Behind The Scenes: We Couldn't BELIEVE What MPG Our 2020 Chevy Trail Boss Got On Our 66-Mile Loop!

( www.TFLcar.com ) When you buy a V8-powered off-road truck, you expect to make some compromises on fuel economy. But is that true with the 2020 Chevy Silverado 1500 Trail Boss? You may be surprised with the result!
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#Chevy #TrailBoss #MPG

[@timothymclaughlin6860]

Wow! I am impressed. 5.3 V-8, 2-Inch Lift, aggressive off road tires . Yeah that's impressive.

[@JL-ep1rb]

Timothy McLaughlin get the same out of the f150 with the 5.0 and the ecoboost.

[@timothymclaughlin6860]

Yeah probably so . I'll give that to ya . But I am a devoted Chevy Guy . Currently own a 2014 Chevy Silverado High Country 1500. I'll stick with my Chevy trucks . Cost of ownership virtually nothing other than gas and oil changes . If I can get that kind of mileage out of the new 5.3 that would be sweet .

[@timothymclaughlin6860]

Yep probably so . But I am a devoted Chevy truck Guy . For good reason too. My cost of ownership on my trucks is virtually nothing other that gas and oil changes . Reliability is everything to me . If I could get mileage like that out of the new generation 5.3 that would be sweet .

[@jbradley100]

Mines is a 2017 5.3 with 6 speed 2 inch lift and 33 AT Toyo tires and I’m averaging 18 on highway AFM is enabled. New transmission, fuel management, and other weight savings GM implemented seem to be working

[@rickeycooley9139]

jeffrey bradley I’m a Toyota guy , but that boss is super nice ! Really gets 18 mpg? Very very impressed ! I have to say. I like it, a lot!!if any of you guys get one let us know,! I don’t have my glasses on so if I ain’t doing this right all apologies! 🍀🍀🍀

[@nealhayes2077]

My '19 LT Trail Boss with the 5.3L & 8spd averages about 17.5mpg mixed city/hwy. However, I usually have a lead foot. Last week I had a 300mi trip and decided to see what it would do if I kept it under 70mph. 24.2mpg!! Pretty damn good, also had close to 1,000lbs in the bed. This truck impresses me more & more every day.

[@ervcz]

I did a 100 mile fuel economy loop with my 2020 Silverado 1500 crew cab LT. It has the 5.3L V8 with the 8 speed transmission. I live in hills of Massachusetts and the highway I travel the most has a speed limit of 55mph, so I did my test at that speed. My final MPG number was 30.73! I was thrilled when I saw that result!

[@Sweetgums69]

Somehow I’ve been blessed and have gotten 496,000 trouble free miles out of my ‘08 5.3 with AFM

[@AJourneyOfYourSoul]

That is awesome Andrew. I just changed the oil on a 2005 Ford F150 that had 320k miles on the 3v 5.4, but I still would never buy a used 3v.

[@1RoadGarage]

You probably just changed the oil regularly...

[@Sweetgums69]

Snake Plissken it was my dads truck until about 2 years ago. He is a part time farmer, which is where a lot of the miles came from. His day job is a good ways from home and that’s where the bulk of the miles were put on.

[@bobquattrini1787]

Hahaha!!!

[@motorcyclemichael2182]

You just jinxed yourself

[@mariobajac]

I grabbed my 2019 Chevy Silverado rst in October and she's just getting better and better in gas as the engine gets more worked in I'm very impressed with how this truck runs and I'm always lugging around all my tools in the back

[@rickeycooley9139]

What is the mpg, I missed it. The boss is s good looking truck, I’m getting the itch🍀

[@rickeycooley9139]

Oh shit turns off cylinders? Damn!!! No to that , no mono and no🍀

[@seanclifton84]

Good content and info as always guys. Just bought my LT Trail Boss yesterday and your channel helped in the decision making process as well plus all the cash rebates chevy is offering this month too.

[@yosam5184]

Oh man dig the twangy music....I need a beer!!!!

[@1RoadGarage]

Pretty dang good for a good ‘ol Chevy

[@jessejames3261]

Best truck in TFL’s stable!

[@alljackedup408]

Have a 2014 Sierra CC 4x4 leveled and on 33's and it gets in the low 20's during highway commute. Love it.

[@chriscooper8112]

I'm an engine tech at a gm dealer. Afm and dfm engines have no more trouble than any thing else on the road. I'm driving a 07 z71 with 340000km no isusses. And I haven't touched a 19 or 20 for anything. Better than ram hemi and more power. We sell dodge too and the 5.7 hemi has a problem twisting off camshafts

[@mattstuart7297]

got the 8 speed 5.3l in my 2019 sierra 4x4 with the catback exhaust and performance air fliter from general motors and im averaging 20 mix city and highway travel.

[@pechmichaelchristina2640]

I must have a heavy foot in averaging 14 city lol

[@Kristian_Saile]

Our ‘18 z71 crew can 4wd gets 23-24 pretty regularly. Street biased Wranglers and stock ride height along with chin spoiler. Really impressed by it and still can tow our 29’ camper without issue. Great motor

[@josephkraft5640]

Impressive. I’m about to buy one of these.

[@k.r.v.4219]

Hello, again Andre’ and once again good job. I'll have to say just over 20 mpg in that Trail Boss at 70 mph is very nice We all know speed is the ultimate factor in mileage! In my 2019 Colorado Crew Cab 4x4,V6, I get what I consider very decent mileage. From an absolute high of just over 30 mpg! Yes 30! But that's only at 45 mph on a flat road with very little traffic, very late at night on The Overseas Highway in The Florida Keys, running between Islamorada to Big Pine Key, an unplanned has run of 48 miles from one gas station to another. I had topped off after a late dinner, heading back to our campsite to hook up an leave in the morning with the travel trailer. After about an hour at 45 mph with the Cruise Control set I noticed the computer telling me 32 mpg!! So I had to pull in at the next gas station I came to, to top off again and do the math. After I added 1.6 gals after the 48 miles I saw the math, 30 mpg! Ok so there’s the high. Later on an every other time at 70 mph on the flat roads with the Cruise Control set at 70, at 1,700 rpm the computer says 24 mph! But at 65 it will say 25, that I must say is the sweet spot. While towing our 4,000 travel trailer we gat as little as 8-10 in The Mountains, on flattish highways as high as 15. I’m totally satisfied with the gas powered Colorado. A friend of mine has an Ext cab 4x4, 2.5 four cyl gas 2018 Colorado, he uses for his small lawn service towing his single axle flatbed landscaping trailer and Tela’s be he gets 18 daily on the job without effort, just cruising with traffic. Seeing as how he has the trailer hitch I asked him what he though of trying to tow my travel trailer? We were both surprised at how well it actually did! Sure not as much power an ease as my V6, but still got it done. But we were in Central Florida where it’s not all the hilly. But the gas gauge did say 12 mpg! On a nice 55 mph road.

[@barrysoetoro3488]

Beautiful truck

[@sleeper5815]

2017 Silverado LTZ Z71 5.3 8 speed getting 20 to 21 MPG in NH lots of hills... love it...lol

[@Jeep2Honda]

I had a 2000 Silverado Ext. Cab Z-71 with 3.73 gears and the 5.3 and a 4-speed (!) auto. I got in the 19-20 MPG range. Love the new Silverado's looks, especially the Trail Boss. That interior tho.

[@pryme2013]

No

[@lc2557]

yes

[@pryme2013]

@@lc2557 down hill with tail wind, yes.

[@nightmare_zl1]

@falchulk I have an 03 SS an if I grandpa it can average 17 to 19mpg no lie, but I will say 3-5 full throttle pulls will bring it down to 14.5 to 16.5 range quick!

[@anantdabholkar685]

Last Summer vacation, I rented a GMC Yukon XL (SLT) 4WD with the 5.3 V8 and 6 speed automatic (355 hp, 383 ft.lbs tq) and put close to 3,000 miles on it. Most of it was between 65 and 75 mph, and I was surprised to get well over 21 mpg! We also did some driving up and down the mountains in Colorado and the 4WD dirt road (old fall river road) in RMNP. The cylinder deactivation does yield major benefits in mpg. I had budgeted 15 mpg and got 21+, nice surprise.

[@camaromustangmods3327]

Just picked up a 2020 lt 4 wd with Z71 package. 8 speed with the l84 5.3 engine. 21.5 mpg average. 22-25mpg highway. Went from a 2017 LT Z71 with the rally 2 package 6 speed. That one got around 19.7 avg mpg 40,000 miles averaged. Set the trip when I bought it new. Just found out the new 2020 has been running in sport mode which inhibits the cylinder shutdown of the L84. Swapped it back to standard mode. Pretty impressive for a full size truck.

[@philllsxga.7737]

I have a 14 Silverado Z71 5.3. on long trips I have averarged 24.2 to 24.6 multiple times with the cruise control set at 76 MPH!!

[@AnthonyJ350]

Nice to see a classic push rod design with modern engineering still able to compete in real world application.

[@nickhearn7585]

I had a 2014 GMC Sierra 4.3L v6. I could get 8.7 L/100kms. Now I have a 2020 2500 HD GMC AT4 Duramax and I can get 9.7 L/100kms. Fuel mileage is getting insanely good on theses trucks. Can’t wait to see what the future brings!

[@jessejames3261]

Congrats TFL! I sense the Rebel is long forgotten now!

[@TheBigBorkowski]

I had a 2016 chevy 1500 with the 5.3l, I went from Denver to Bakersfield with a dirtbike in the back and a lot of weight in tools and race gear and the round trip average was 24mpg

[@williamoverton7265]

Andre does the best videos

[@velasco1100]

That's very impressive.

[@JL-ep1rb]

Luis velasco dame as the Ford

[@andybub45]

The 5.3 is a great engine. Especially the older ones from the early 2000s. Sure, when AFM started these were nightmares but the newer ones are better. Its nice to see that GM has stuck to the tried and true pushrod V8!

[@omnipresentvideo7686]

The new ones have their ups and downs. Our shop is seeing lots of timing cover and oil pan leaks. 15 hours of labor for the timing cover.

[@Jksnk101]

@@omnipresentvideo7686 I have an 07 new body style. Mine is leaking bad and before that was eating about a quart between oil changes. Looks like head gaskets and possibly the pan too which I didn'tknow about until seeingyour comment. Not looking forward to taking it to the shop.

[@MBailey1977]

Had to put a new oil pan gasket on my 05 that has a little over 100k.

[@Gbus85302]

I have 2014 with 5.3 with 82,000 miles on it. Only thing i notice is it uses about quart & half between oil changes & that was from day 1. Zero issues so far mechanically. I was a bit shocked that this engine takes 8.5quarts of oil compared to bigger engines that only take 6 quarts. Best milage was 25 hwy on Cruise control at 65mph.

[@EverydayJ1786]

@@omnipresentvideo7686 I agree with you . My 2015 5.3L L83 had the upper oil pan resealed twice under warranty , and then I went through 3 oil pumps within 4 months . I asked the dealer if gm had a fix for this known issue , they straight out said No . I traded it off after that . Was very unhappy with GM's long term reliability .

[@BeanoNoir]

With the cylinder deactivation engines, a lower numeric ratio (higher physical) final drive actually becomes a hindrance. The ECM will detect higher loading, preventing deactivation from happening as often. This is mostly as it pertains to the highway, since all cylinders will be firing under acceleration. The same is theoretically true for turbo charged engines with electronic wastegates. I once had a previous gen GMC Sierra that had the 4.3l ecotec but with the 3.42 rear end. I regularly saw 26 mpg on the highway, and as high as 29. In the city it was a different story, as it was regularly about 17 mpg. My current truck is an F-150 2.7 with a 3.73. if I keep it under 70 mph, and no head or cross wind, it regularly pulls 25 mpg. As soon as I cross 70, it dips fast as the highly aggressive program demands a lot of boost even if the engine is only turning at 1800 rpm. I wish that Ford would have simply programmed it to drop a gear or two and keep the wastegates open like VW does on its ea888 gen 3 and later engines. It's more efficient to spin a smaller displacement pump moderately near stoichiometric than a large displacement pump at the lowest mechanical speed with a rich fuel table to cool the turbos/ exhaust manifold.

[@BarDownBoys]

Great comment

[@regsparkes6507]

That's good,..but I had a 2014 SIlverado with the 6 speed and that 5.3 engine,..it was impressive for me too. That 5.3 is just a great engine,..good job General Motors!

[@philllsxga.7737]

I have a 14 Silverado Z71 5.3. I've gotten 24.2 to 24.6 AVERARGE multiple times at 76 MPH!!

[@jaysson1151]

PhillLsx Ga. you are one of the very few people that actually states how fast they’re cruising when giving their hwy mpg! 24mpg in a V8 4WD going 76 mph is phenomenal!

[@philllsxga.7737]

@@jaysson1151 my buddy averargers around 25 with his. Same truck as mine.

[@regsparkes6507]

@@philllsxga.7737 Actually, I have gotten that with an empty ( just driver no cargo ) truck but I drive at our posted limit of 60 mph. It can be done folks!

[@jaysson1151]

PhillLsx Ga. That’s pretty sick! I’ve seen so many ridiculous claims, mostly from diesel owners, of getting 23-26 mpg “on the hwy”.... I’ll ask how fast were they cruising, they say something between 60-65 mph..... 🤦‍♂️ Is the 5.3 pretty peppy in your Z71? I currently own a 2012 F150 4x4 with the 3.5 Ecoboost, love the power and effortless acceleration but the mpg leaves much to be desired. I’ve driven a 2018 Suburban with the 5.3 but it felt like a dog. Of course the 3.08 gear ratio didn’t help. I’m looking at the upcoming Yukon XL AT4 as a potential buy!

[@Sparkystacoma]

When you put an exhaust on it you should do a mileage run right before and after and se if it actually helps any. That's almost science

[@rsdokc]

I'm a new Ford 150 5.0 4x4 owner and for highway mpg I avg about 21.8. Which surprised me. That's driving 75 to 80 in Texas. And the 5.0 has a little more power. Love your videos

[@Bryan-Hensley]

Then you'd get about 15 MPG in East Tennessee.

[@poppyneese1811]

Well done GM! I’m a Ford guy, but have to say GM has always been able to tweak a lil more mpg’s out of their V8’s than the other manufacturers. I get honest 23 highway out of a 2.7 Ecoboost, but that’s babying it. You spin up them turbos and it falls fast.

[@gpaje]

Sure, but the same with the V8, you push that throttle and the mpg falls fast. Also, your 2.7L will smoke that 5.3L.

[@JHuffPhoto]

I had a 16 F150 XLT SuperCrew Cab, 2.7eb with 6 speed, 3.55s and 4WD. Over the life of my time with the vehicle (about 37K mi) I averaged 19.4 MPG (I tracked every fill up). That was probably about 60% hwy and 40% city. I was pretty impressed with that combo. I never really towed or hauled anything with it so that result was pretty much empty but not babying it either. Really 20-21 MPG highway for a full size pickup is pretty damn good. I had a 2009 RAM with the 5.7 Hemi and I struggled to get 16mpg on the highway.

[@gpaje]

@@JHuffPhoto Yup, same experience with my 2015 F150 2.7L, loved that truck. Also love my current truck, which is a 2019 Rebel 5.7L. I can squeeze almost 19 mpg all highway if I take it really easy, but 33" tires and 3.92 axle ratio isn't doing mpg any favors.

[@kdavid123186able]

Ur number is pretty good. I had 4x4 3.7rear 2.7eco with 6speed. 15mpg. I never babied it for mpg but was expecting more

[@poppyneese1811]

gpage it will fly, hard to believe how strong quiet and economical these tiny engines are 44k and not a single problem

[@UltraSS-nj8kd]

Very nice i bet it will get better later on. My sierra 6.2L got slightly worse after air intake. Exhaust got me up to 21 but i have to pay for premium fuels so I'm spending more ... plus the engine cost. But i have had tons of 5.3L so i was ready for a change. Really like the new one though it definitely no slouch.

[@dilsher12]

You don't have to run premium with the 6.2 it is recommended but not necessary, you might loose 10 hp at the most

[@JN0777]

I drive many different trucks. My daily is a 16 duramax that gets 18-22mpg depending on how i drive or where i am. Right now I'm driving a 19 ram classic and I surprisingly get 20/21 consistently. I've driven the new chevy but never really drove long enough to get accurate mpg reading.

[@brokenspokes6731]

I have a 2007 silverado with the 5.3 engine and I get 20+ on the highway.. Similar setup with tires too.

[@Localdriver1990]

I have the 2020 Silverado RST 5.3 it’s a great Truck!!!!

[@terrencejones9817]

My 19 8 speed Trail Boss averages 18-19 mpg with 70/30 highway city driving. My previous 2014 F150 5.0 with a level and 33s got 17mpg in the same conditions.

[@lewiswatchorn7239]

Since the Trail Boss isn’t available with the 3.0, you should run the fuel mileage loop while towing the same trailer with the AT4 3.0 you’ve been testing. It returned a little over 18mpg towing a Polaris but an apples to apples comparison of the 5.3 with 10spd and 3.0 with 10spd would show exactly the comparison between the two motors.

[@rkalla]

No good truck review is complete without 80s porn music at 400% volume.

[@leoderosia9279]

Haha

[@kevina2052]

Yeah, it's horrible.

[@explorervango880]

My 2019 2.7 F-150 crew cab didn’t get better than 21 highway for a full tank when it was new. Now after 10k I can get 24 easy and that 600 mile range tests my bladder. Another thing besides putting some miles on the engine that helps is experience with the various drive modes. Eco mode is not the best on the highway. Regular on flat roads. Mountains and areas with higher limits I’ve had the best luck with sport mode easy on the gas coasting down the road.

[@leonardrice1500]

I've had 2 5.3 engines..an 08 and now an 18..never given me trouble..sold the 08 to a friend and it's still on the road, its wheel wells are looking rusty but not the frame.

[@poppyneese1811]

Leonard Rice friend bought a Silverado to house, 280,000 showing, asked if I’d buy it, nope to many miles, probably 7 years ago and he’s still driving it every day!

[@PETERLINNAH]

I've been telling people this same thing for a couple years now. The GM 5.3 V8 is outstanding when it comes to fuel efficiency. I have a 2017 Suburban, 5.3 with 6-speed transmission. Our last 2200 mile trip out in the Western states gave us 23.4 MPG. That's door-to-door (garage door that is). That's all kinds of driving -- some highway, back roads, up and down mountains, through small towns, construction delays, cruising through National Parks, etc. And this is the with the older fuel management system which just cuts down to V4 at times. The new updated version should be even better, especially with the 8 or 10 speed transmission. This is a three-ton vehicle with all the comforts you could want. My wife and I sleep in back when camping. It's smooth, quiet, and a joy to drive.

[@Lunker74]

Have this truck. Just under 3000 miles 50/50 city highway. 80 mph on hwy. Averaging 21.4 mpg so far

[@generaldrz]

I have a 14 Sierra double cab 4x4 work truck with a cap and a lot of tools with a 4.3 and 100,000 and get 17 mpg, was thinking about getting v8 on the new truck for pulling trailer but v6 does really well

[@rocketj7449]

I averaged 8.8 mpg towing from Weed, over the Siskiyou's into Medford, Or. The MPG on this truck is no joke. I easily avg 22-23 highway empty. Coming from Fords and Toyotas, I am slowing becoming a Chevy believer.

[@LightningRich00]

And this is why you get the 6.2l engine. It actually has some cahoonas. TFL truck did very similar tests on the 6.2 max tow 8 speed truck with a trailer weighing 2k lbs more (9k lbs) and driving 75mph, not 70mph....Truck got 19mpg empty and 7.55mpg loaded on their 100 mile loop they used to do.

[@REZhomie]

They need to change the name of the Trail Boss to the "Get 'R' Done" edition lol

[@Inferno45]

Ryan D ? Whats that supposed to mean??

[@rickeycooley9139]

It’s a stupid take off on the cable guy bull shit ,any time some one uses it, sounds more and more Childress and STUPID. When someone at work says that to me I allways tell them to take that 15 yr old old minded floolish shit to other side of plant with the other children🍀

[@conduit242]

@@rickeycooley9139 🤣🤣🤣 rekt

[@tylernewton9538]

20.7 now tune it to 91-93 octane and turn off the cylinder deactivation keeping it in v-8 mode at all time and the mpg will go up. I get 22-25 out of mine v-8 only with the old 6L80 trans so a 10 speed should do the same or better

[@ze3bar]

You guys should note how windy it is that day when you do these tests. In my Silverado, there’s a huge difference in mpg when there’s an 8 kph wind and a 24 kph wind.

[@jamesbeaman6337]

Peter Abou Gharib these guys are running a loop so wind shouldn’t matter. Are you seeing a big difference running a loop?

[@ze3bar]

James Beaman I drive 300 km in one direction

[@james4wd236]

I used one this weekend towing a 20ft. car hauler with an engine and transmission on it I got 14.5. Empty driving around town its showing 19 on the IPC. Not bad little truck and they're starting to go down in price.

[@gregoryfuller1136]

That was a great looking watch. Which specific Invicta model is it?

[@johndeeretractorguy.9855]

I have a 1997 Dodge Dakota with the 5.2 v8. Towing it gets 8 mpg same as the new truck. However not towing it gets 12-14 mpg on a good day.

[@j.m.1259]

Best MPG I’ve had on my 2018 5.3 crew cab 4x4 according to the computer was 21.5 on a 500 mile trip. It pales in comparison to that Duramax.

[@cmiller8006]

Just bought one. Last 50 mile average was 29.2. GMC sierra

[@MrRGiller]

@@cmiller8006 In a 4X4 and what was your average speed? You probably have the 3.21 rear end ratio?

[@j.m.1259]

Average of about 75 mph with a 3.43.

[@cmiller8006]

@@MrRGiller yes 4or with x31 package. That was a mix. Some 65 mph and a small amount of city. Seems the truck does about 27 at 70.

[@MrRGiller]

@@cmiller8006 My Silverado 4X4, double cab with the 3.42 rear end ratio will only get around 21 on the highway

[@ronmac1832]

Good MPG is a nice trait, but you will only save $134/year if you get 20 vs 18 mpg in 12,000 miles @ $2/gallon. Buy the truck that will be the most reliable and hold its value the best and don't worry about mpg.

[@frankdawe5156]

Those Trail Bosses are some of the best looking trucks on the road today. And with impressive fuel economy, they are looking more attractive all the time.

[@charlesrogers1471]

Yeah, it's the only Chevy trim I am willing to consider currently.

[@raymondkloberdanz6155]

I've got the 5.3 afm with the 6 speed. I'm averaging 15.5 mpg with average high way speed 78. 55 mile loop. I'm really curious what I can get on longer highway trips

[@jnmaher1967]

With Truck expenses being high, would you suggest skipping 1/2 ton and just getting 3/4 ton or 1 ton? Do you find people who buy 1/2 ton going back to get a larger truck in the end?

[@nightstalker824]

Very impressive! Really, it is. That said, I just couldn't bring myself to purchase one after my 2017 f150 5.0 burned me. It was in the shop for warranty work 4 times before I had enough. The GM cylinder deactivation would always have me second guessing reliability in the long run. I went with a 2019 tundra. Yes, the fuel economy makes a dent in my wallet, but piece of mind makes up for it.

[@bhampresson]

I did the same, got 2018 Tundra XSP after my 2002 F-150 finally died on me.

[@MrAbword]

I’m a gm Tech. Never had a truck come in for engine issues.

[@nightstalker824]

@@MrAbword please send this comment to Guinness world records..

[@MrAbword]

night stalker I’m just saying 😂😂😂. Let me rephrase that..... Their engines don’t fail from faulty engineering, always ones coming in believing in the 10k+ mile oil changes. Now their transmissions on the other hand.... well that’s a different story.... Piss poor torque converters grenade the trans

[@toofastnobrakes]

Could you guys do a towing and mpg test of two of the same HD truck, but with different axle ratios? Like 3.55 or 3.73 vs 4.10 or 4.30? I really want to SEE what difference there is in towing time and fuel consumption. Both with and without a trailer 👍🙏

[@rocketj7449]

I could tell you the difference between a 3.42 and 4.56 Chevy rear end.

[@toofastnobrakes]

Rocket John it’s more about seeing the difference. I’ve heard it all. But I want to see the actual number

[@tcarmody123]

With most vehicles going to a 10 speed axle ratio matters very little.

[@joeraptor1]

That's really good fuel mileage. I have a 2019 Sierra 4X4 double cab with the 4.3 V6. I'm lucky to see 14 mpg in the city. The 5.3 on my old 2010 Sierra got almost the same. I think that the big hood and bulkiness of the truck creates too much wind resistance thus leading to declining fuel economy.

[@jamescundiff3264]

no. it's the 4.3 working extra hard to move a 6,000lb truck. The 5.3 does it a lot easier

[@joeraptor1]

@@jamescundiff3264 I will have to respectfully disagree. The same 4.3 V6 configuration in a 2018 Sierra (Old style) gets a rating of 17 mpg/city and 22/highway. The new 19 design gets a rating of 15 mpg/city and 20 mpg/highway. These numbers are down quite significantly from the old style even though the new style is lighter. When I drive my 19 Sierra, I've never felt the motor lacking power. The truck moves very easily and is very responsive. It doesn't feel all that much different than my 5.3 on my old 2010 Sierra. Eliminating all of these variables leads me to believe that the bulkiness and excessive large hood is creating excessive wind resistance. Here's an explanation: gmauthority.com/blog/2018/09/2019-silverado-fuel-economy-why-the-numbers-barely-moved/

[@TheACCHRM]

How about this. I am a dealer so I get to drive a lot of trucks and cars, I drove a 2020 Silverado RST 3.0 Duramax (non Trail Boss), did about 55 miles of highway and average of about 75 mph. My AVERAGE was 34.5 with cruise control!

[@Bill1993YT]

I wonder if someone will sell an auxiliary tank add on that would take advantage of the extra fill hole in that gas door eventually

[@nightmare_zl1]

Do it make money!!

[@cfltitan]

Not really surprising seeing as how the GM 5.3 has always been a VERY fuel efficient truck motor. My well worn in 2014 Silverado with "only" the six speed auto and V8/V4 modes got 22.8mpg on a road trip and regularly gets 18-19mpg in mixed driving (about 60/40 highway/city). Also my Silverado has a leveling kit and I removed that hideous HUGE plastic air dam under the front bumper so I don't even have as good as factory aerodynamics. Mine is a double cab 4wd with the Z71 package.

[@mikeschafer2474]

Curious if it has a trailer mode you can put it in? I know in the past trucks have had a trailer mode to help keep the RPMs from jumping around and the truck shifting in and out of overdrive/hi gear as it was doing in your trailer segment.

[@BigFrogs4x4]

Drive even farther and that should go up. The more fuel you use between fill up the light the truck will be since you have less fuel in the tank. Probably see 22mpg if you drove 500 miles then filled.

[@Murderbation]

My Silverado 5.3 at 60mph, computer says I'm averaging 22mpg but I'll probably have to do this test to see how that adds up

[@cmcconn100]

That pretty decent mileage for a full-size pickup. MY '19 Taco would get probably get about 23 MPG. I'm not sure as I live at sea level. I drove the 5.3 and 6.2 recently, it'd be hard to pass up the 6.2 as it had so much better acceleration. I was laughing about your MPG figures, my motorhome gets around 7-8 MPG NOT towing, although towing 5000 lbs, it's maximum tow rating has almost zero effect.

[@misohoney4656]

Mr Truck always aims for the dirty hole. LMAO!!

[@Kawika997]

The 5.3 didn't have enough torque for me and it seemed like it struggled to get up to speed and just seemed like it was constantly trying to find the right gear I wasn't impressed. Went with the hemi in my rebel!

[@hdfsfjhfkalsjfhlsaj]

24.3 is the best MPG I got over 400 miles for a 2018 with the 6 speed from Castle Rock and Longmont repeatedly.

[@ludah99]

hdfsfjhfkalsjfhlsaj I got a 2014 Sierra with 5.3 and 6 speed and I have also 24 mpg on longer trips

[@outoftheboxwoodworks7560]

same here, 2017 5.3 327 , 305 gears???, very tall gearing but i get over 25 mpg on highway with heavy load in long bed, regular cab LS, love that truck, i run 87 octane, any higher it kills mpg for some reason and I prefer cheveron fuel and sometimes 76... truck has 20k miles

[@racingfortheson]

Y'all should do the Ford before and after the chin spoiler

[@onebdcuda]

06 1500 5.3L silverado with 235000 miles and still getting 19.5 mpg.

[@XBEAST2023]

Andrew is the best of TFL! Keep up the good work!

[@josephdenver1612]

2018 Silverado 4x4 with a 4.3 got me 24 mpg @75 mph average. I would gladly trade a few mpg's for some guts. This thing can't get out of its own way

[@alexg4324]

I like the 1500s I wish they had a bigger fuel tank tho

[@Vin3Man]

Is this the same engine yranny combo that will be in the new Tahoe, Yukon, with the new cylinder deactivation? Skip fire?

[@TFLtruck]

Yep. It is the same.

[@nathanmcdonald610]

21 mpg inst all that impressive. I get that out of 2011 F-150 5.0L FX4, I'd expect a 9 year newer truck with 4 more forward ratio's to do better.

[@kirtzombie8148]

Did you do the 6.2L or 3.L yet?

[@thewrench324]

Change the oil more often then it says on the dash or the lifter trays wear out and kablooie

[@awsdws7727]

20.68

[@glaze9951]

With this music I'm expecting a dude to come out with a 70's mustache saying "Who wants a mustache ride" lol!

[@paas624]

My 2018 Silverado get 19.5 in the city and 24.2 on the highway

[@bbtjdonnelly14]

8.2 is pathetic for a 10 speed modernized truck. My 85 f250 with a 460 and a 5 speed gets that towing twice the weight. That said, love what you guys do for us keyboard warriors, thanks for the content!

[@hochhaul]

460? Awesome engine but that thing is doing good if 800 yards per gallon. You can literally watch the needle on the fuel gauge move.

[@cinder9950]

Pssssss, I got a 454 with dual Holley double pumpers and hot shot pull 31,000 lbs across the Rockies and get 27 mpg all day long brother

[@4vinylsound]

24 gal that's it that is a deal-breaker my friend

[@lambertsaldi1550]

Not bad 👍👍🇺🇸

[@ec6933]

21mpg!?!? That's insane!?!

[@philtripe]

insane that its the same as the F150 with the 5.0

[@tewksburydriver8624]

@@philtripe … I agree but the trail boss does not have road tires, has a 2"lift and no air displacement on the front end. 21 mpg for the Trail boss is impressive.

[@ze3bar]

I have the 2018 5.3 V8 and it does 23 highway with AFM disabled

[@tewksburydriver8624]

Peter Abou Gharib .. how did you disable it?

[@ebels3]

@@tewksburydriver8624 tuner?

[@nthewalk]

Never ever top off your tank!!!! It will flood the remaining area meant for evaporation and you will kill the evap system!! It will eventually throw codes ..........P0446 I learned the hard way on both of my vehicles 96 Chevy 3500 dually and a 07 Trailblazer SS

[@ironsaber2]

Funny contrast between ra. Mpg loop and silverado mpg loop

[@cwyoming7004]

It sure puts your old Rebel to shame. Thanks for the videos

[@gpaje]

Rebel had 33" tires and a higher axle ratio and Hemi V8, that's going to kill mpg compared to the smaller tired Trail Boss and axle ratio and 5.3L.

[@EGGINFOOLS]

@@gpaje smaller by .2 inches. Not really smaller

[@gpaje]

@@EGGINFOOLS Nope, you forced me to check. The Rebel's tires are 33.2" tall, the Trail Boss's is 32.1. The difference is 1.1 inch, which will typically lower the mpg by at least 1 mpg. Factor in the higher axle ratio on the RAM's more powerful motor 395 hp/410 ft-lbs vs. the 5.3L 355hp/383 ft-lbs and I'm actually surprised the difference in mpg isn't greater. I mean the RAM has 1" larger tires, 3.92 axle and 40 more hp and 27 ft-lbs of torque, what do you expect?

[@EGGINFOOLS]

@@gpaje hmmm. I thought they were 32.8. nevermind then..

[@gpaje]

@@EGGINFOOLS I think they are for the Canadian spec trucks if that's your neck of the woods. US spec trucks like the one's TFL is testing are indeed 32".

[@RJZJR1]

would it be any better with premium fuel 93+ octane. if money was not a factor.? thanks guys keep up the great work.

[@MrChadx1]

Premium is a waste of money in the 5.3 as it was designed for low octane. But in the 6.2, which was designed for premium, it's the only way to get the rated hp and mpg. So not only pay for the engine upcharge, but an extra 30 cents a gallon for the life of the truck. No thanks on engines that need premium. Glad the 5.3 is made for low octane.

[@williamoverton7265]

Have you done tested the F450 like this?

[@rockycadieux4642]

I wonder if Mr. Truck likes to know what gear the truck is in? 😂

[@jimparker7778]

While gasing up the Chevy, Mr Truck actually asked Andre "which hole do you use". No wonder nobody wants to ride anywhere with that guy.

[@sweetcoolluvaboy]

Just bought 2019 LT TB 5.3 Calculating 13 mpg, even on highway. Why so low?

[@craigg4246]

That’s the same mileage I get with my F150 4x4 5.0 V8 that has much more power than the 5.3 Chevy and doesn’t need to turn its cylinders off to do it!

[@terrencejones9817]

My F150 5.0L could never beat 17mpg. Mostly highway too. And maybe on paper the 5.0L has more power. Where you do 90% of driving the 5.3L makes better low end torque.

[@35RSkyline]

My 94 5.7L TBI engine gets 18mpg. Towing or not towing if it's a light load it gets 18 putting a trailer with 6000lbs on it I got 14 but that's been the worst. Don't get me wrong 21MPG for a truck isn't that bad but that's only 3 MPG better than a truck from 26 years ago only getting 3mpg worse. I would think in 26 years we would have gained more but it's still respectable. Yes the 5.3 does make more power it does have bigger tires so I would bet the normal Silverado would get better MPG.

[@Bryan-Hensley]

I got between 11 and 14 pulling a 28 foot camper with a 1999 5.7 Chevy express 2500 HD van running 70 plus MPH with 3 dirt bikes inside the van. That's in the east coast mountains too. The biggest difference is the 5.7 maximum torque is at 1800 RPM. The new 6.0 maximum torque is at 3500 RPM. It has to rev higher to pull

[@Bosha92]

You forget that it’s gone up 3 mpg while the trucks themselves have gotten much larger, which effects aerodynamics. In addition they have much more technology in it (which adds a weight) considering this and that they tow what 3/4 ton did 26 years ago it is quite impressive!

[@Bryan-Hensley]

@@Bosha92 I didn't notice they said they are 1 mile high in elevation when I mentioned my mileage. I don't even know how to compare with this test. It kinda makes it worthless to the majority of us who live below 5200 feet.

[@mbiker345]

the way they are able to do that is with that system shutting down half the cylinders alternately. Downside of that is that it has no longevity at all. I have had two friends with that same 5.3 and lost their valve train at around 70k miles. so you get good fuel economy but it wont reach 100k. btw the repairs were 6 and 7 grand respectively. They have both switched to tundras since then.

[@andybub45]

That was the older AFM, and while I agree cylinder deactivation is stupid, the new DFM is supposed to be better. Nevertheless, an easy way to avoid issues is to buy a delete chip which is being worked on right now.

[@texcc789us]

lol My brother (16' - 130k), dad (18' - 25k) and myself (14' -168k & 19' - 16k) have the 5.3 silverado's with both AFM and DFM. We tow boats, trailers and loaded beds pretty often and the trucks that we own have been bullet proof. Had some recalls on the 2014 but nothing with the Block or trans, so I am not sure where you are getting this "wont reach 100k" from. FYI If you're driving around in a Tundra, you might as well be in Honda ridgeline, dont @me lol

[@pryme2013]

@@texcc789us the tundra 5.7 way back in 2007 shits all over the current 5.3 2020 power numbers so if it's a ridgeline what does that make a Silverado lmao

[@pryme2013]

@@andybub45 lol I've been hearing gm and ford fans say just what you said for 30 years. "Oh that was the older model" so in 2023 you will all be saying oh that was a problem back in 2020 lmao it's a never ending cycle.

[@Bryan-Hensley]

@@pryme2013 if you can afford the oil for them. And transmission bearings. I make good money working on Toyota. Oh yeah, timing chain tensioner. Water pumps, door handles, door locks, window motors, suspension parts. They do have great interior though but the door hinges fail quite often.. oops I forget climate fans. I keep updating, I forgot the headlight issues

[@trevorjurges3430]

I have a 17 Sierra 1500, 6.2 and the 8 speed and get 21 to 23ish running at 70 on the freeway. It has a 2 inch lift. GM V8s are the best

[@derekenz4185]

Hows that 8 speed transmission?

[@trevorjurges3430]

@@derekenz4185 good, it gets a bad rap probably because there is sometimes a hard shift between 1st and 2nd grear right after a cold start. The dealership and my research online say it's a normal thing for this transmission to do. Good gear ratios for towing 7-10k a few times a year.

[@RockinRack]

Just got the 2020 high country with the 6.2 Only about 60 miles on it but so far just driving in town i get about 11mpg lol Hopefully she breaks in a little better. I was expecting 14 but 11 is pretty terrible

[@purplejwhayes]

Nice video.