AWD vs RWD - What’s More Efficient? I Answer This Age-Old Question Using The 2023 GMC Sierra 1500!

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( www.allTFL.com ) Check out our new spot to find ALL our TFLstudios content, from news to videos and our podcasts! Not only does the 2023 GMC Sierra 1500 sport the half-ton's recent facelift and the luxurious Denali Ultimate trim, but this year also sees the new LZ0 3.0-liter Duramax turbodiesel. We already know its an efficient powertrain, but here's a critical question: Will leaving the truck in AWD mode (4-Auto) kill your MPG versus actually switching the truck into 2WD mode? Andre and Nathan find out!
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#gmc #sierra #duramax

[@TFLtruck]

TFL runs on Sinclair fuel and so should you. Download the Sinclair DINOPAY app and start saving as much as $0.10 or more per gallon on your next fill-up. ( www.sinclairoil.com/customers )

[@leeward6762]

The GMC isn't AWD...its 4Auto...big difference

[@RodVonLongrod]

Nathan: "Hey Andre. Do you know why I love this new 2023 GMC Sierra 1500?" Andre: "Why's that Nathan?" Nathan: "Because it comes with Cruise Control!" Andre: "I'm going home now."

[@gorillaplays8926]

Every car comes with cruise control from the factory

[@foubert45]

It is auto four wheel drive on the GMs. Not AWD. Which only engages at the front when the rear loses traction

[@jamesinsteamboat]

Yeah, 4A is not AWD. That being said, living in CO, I wish these $80k trucks would offer a sophisticated AWD system in lieu of 4WD and 4A.

[@lunamaria1048]

Exactly! 4wd is defined by a vehicle being able to power 4 wheels, on 2 axles, simultaneously. AWD does not do that, as you just describe.☺️

[@NWI_Steel]

Awd has a center diff

[@lunamaria1048]

@@NWI_Steel irrelevant lol

[@NWI_Steel]

@@lunamaria1048 uhh, no

[@AUav8r05]

I can’t wait for my Yukon Denali 3.0! Such a home run engine GM has designed.

[@BillO964]

I have owned both diesel and gas powered trucks and towed larger travel trailers all over the USA. Forget a larger trailer with a 1/2 ton truck. It is awful and unsafe. I had a Duramax 3/4 ton 4x4 for about 12 years. Wonderful for towing but expensive to drive and maintain. I traded that for a new 2019 Ford 3/4 ton Super Duty 2x4 with a rear electronic locking differential. Another awesome truck. It was cheaper to run and less maintenance cost than the diesel. It towed like a dream. Towing off road with just 2 wheel drive and that locker was no problem. I do not miss the 4x4 one little bit. In case you are wondering , I have well over 200,000 miles towing between both trucks traveling in on and off pavement in all weather conditions including mountain snows in the Canadian Rockies. After all of that, I am convienced for the average person 4x4 is probably unnecessary. I really like the power and control of a diesel, but not today. They have goofed up diesels so bad with DEF and all the EGR junk that it makes them all so undesirable , hard to maintain, and too expensive in my book. If you are rally sold on a 4x4 forget the AWD trucks and get something with a true 4x4 , if you can find one. AWD is for on road cars and small SUVs, not real trucks.

[@Dusdaddy]

Agreed on the diesel part. Too many EPA rules. But this baby diesel was designed purely for economy not power like those big ones. It's closer to a Benz or VW diesel car than a big towing diesel.

[@MEFelicia]

I gotta say, I love you guys. I've been watching TFL for some time now but really got into the videos with you two when I started researching my GMC AT4. The info is always in depth and helpful. The humor between the two of you is fun and keeps a smile on my face while I learn about these trucks. Great content that I appreciate. 👍🏾

[@jamespeart9922]

Gm had AWD/full time 4wd in their trucks and SUVs in the 1970s. The used an NP203 transfercase which had high and low range lock/unlocked. Just a few years before the early 2000s trucks mentioned :)

[@Dusdaddy]

Another one is Jeep's Quadra Trac starting in the 70's as well

[@freezinghotshot]

My 1976 K5 Blazer had that system.

[@G-Rated]

This is the only half ton truck I’d spend this kind of money on because it’s worth it. The High Country would be a tough sale at $86k, thankfully it doesn’t costs that either. GM has done a tremendous job and offers the best in value and packaging when it comes to this segment.

[@Dulcedan]

Gm absolutely killed it with that 3.0 dmax. I’m getting close to 600 miles in a single tank. Towing my skiff I still see 22mpg.

[@taylordoingstuff]

Completely agree. I have the LM2. 42,000 miles, no issues, amazing economy. The perfect 1/2 ton engine.

[@ericdiekmann2308]

Me too although diesel costs more so it's pretty much a wash

[@mitchsfarm]

Not in Ontario Canada. 25 percent better milage for fuel that costs the same.

[@Dulcedan]

@@taylordoingstuff it really is the perfect engine.

[@MrTesedgar]

I too get 600 miles on my 2.8 colorado and it has a small tank. I would change my colorado for this if they put the timing belt in front like the colorado in the meantime am stick with the colorado. 120000miles on it am hoping for another 200000 mile .

[@jaykanngiesser3454]

Autotrac was introduced in 1998. I think I have had 4 of them here in Alberta. Perfect for winter use. I leave mine in Autotrac all winter unless absolutely dry. Have never had an issue, but always change oils on severe service intervals.

[@TaigaTurf]

AWD is a great addition to fullsize/ heavy duty trucks.. Im always shifting on the fly to 4 Hi on wet, washboard surfaces.. this is a good feature to have

[@jasonpitts8395]

I'm more concerned about the prices. I love all the TFL reviews and the various tests TFL conducts. You guys are the best 👍

[@tjeastcoast4669]

Yeah prices are insane.

[@cup_and_cone]

Prices would not be insane if people stop buying them. They charge that much because people keep buying them, so they can.

[@sunvegeta]

100% agree with you!! This truck that is shown, I won't afford it until it's ten years old and one hundred thousand plus miles in it.

[@tjeastcoast4669]

@@cup_and_cone I agree you don't have to worry about me I'm not buying one 🙂👍🏻

[@MrChadx1]

@The Fast Lane Truck Auto 4wd is not "All Wheel Drive". All wheel drive is designed very different and sends a percentage of the power to both axles at all times and is designed to be on all the time. Auto 4wd, in these trucks, is sending power only to the rear axle. Once a certain amount of slip is detected, it sends some of the power to the front. Also, Auto 4wd is not designed to be left on all the time. If you leave the truck in Auto 4wd all the time, it wears out components needlessly and gives worse gas mileage than 2wd. Some AWD systems can disconnect power from one axle entirely. That is known as "Part-time AWD". Bottom line is AWD is designed differently because it is designed to always be active where Auto 4wd is RWD that auto engages 4wd, with clutch(s), if a certain amount of rear wheel slip is detected.

[@duramaxadventures5832]

FINALLY someoen who understand teh xfer case as a clutch in it and can send a variable amount of power forward based on metrics.

[@dr.rodneyjthornelldds3648]

Love the video, but the Rush T-shirt is amazing. Best band in the world! Thanks for representing.

[@Yob126]

MORE of The Nathan and Andre show please !

[@jonathanhummelman6505]

hey TFL, glad you guys test vehicle towing and mog numbers. however in 4wd auto the front wheels only engage when the computer senses less load on rear wheels due to slippage. therfore it wont really ever be awd through this test. only has a clutch like ready to initiate if the wheels would slip. unless you drove the truck like you stole it, the awd didnt really ever engage.

[@chrisbrook1234]

We have a 2021 GMC Canyon Elevation Duramax 2WD and this is a big part of why we love it; we consistently average about 8L/100km (30mpg) with a 20/80 mix of city/highway, although it can hit the low 7L/100km range (mid-30s) in strict highway driving, with a fuel range of over 1200km per tank. Now that the diesel option is gone from the Canyon, we'll be hanging on to this truck as long as possible.

[@christophercassidy1075]

Excellent video, greatly appreciate content on the GMC Sierra Duramax Truck! I will be purchasing one soon! I can’t wait! Have a great day!! God Bless!

[@markmonroe7330]

Since DEF is required along with the more expensive diesel fuel, how about showing what the cost and usage of it is as well. $85k'ish for a 1/2 ton truck is just nuts. Even nuts for a 3/4.

[@chadmark88]

The diesel price at their station was exactly the same price as premium - which is recommended for the "other" 6.2 engine that is common in these trucks and SUV's.

[@OBS4ever16]

A basic half ton similar to tfl's ram classic cost around 12000 in 1995 which would be around 25000 today.

[@tnargdonald]

Everyone tried to bring DEF usage into a cost. My 2018 SRW 1ton ram gets 975-1200mpg of Def. It’s $3 at the pump. It’s negligible.

[@SuperSnakePlissken]

I bought a 2012 GMC sierra Dooley 3500 Duramax diesel brand new for $46,000 fully loaded. That was very expensive during that time hard to believe a truck is now over $100,000. Bidenflation is real.

[@chrismassey5865]

I have spent $20 on def in my 22 LM2 over the last 16k miles.

[@Veterans-e2c]

Still love these guys been watching you guys since the beginning

[@danielwilliams4473]

I've been a long time chevy/gmc owner. I just bought a new Ford f150 3.5 limited powerboost hybrid last year. Ford blue cruse can be used with a trailer. There's also 2 different "blue cruse". The light color blue cruise is when you're in towns or on hwy, where there are on coming ramps. Those sections, the truck tells you to touch the steering wheel often. When you're on the main interstate, the dark color blue Cruise will show. That's when you're 100% hands/foot free. It will also slow down or speed up to the different changing speed limit signs. It will adapt to every changing situation.

[@jonmessler7067]

Got my 2023 RST 3.0 in January and have put 12k miles on it, best engine I’ve ever had, u real fuel economy. It would be amazing if GM came out with a hybrid-diesel variant of this. I feel as thought 8-10k miles it was broken in, MPG got a little better and DDF consumption decreased.

[@christopherguzzi1316]

From my understanding, you don't really see mpg gains with a hybrid diesel as electric makes tons of torque just like diesel does so it is sort of redundant technology.

[@secretsquirrel6257]

I would like to see this test with a "true" RWD vs Auto-4WD. The front axel drive and transfer case add 100-150 pounds (?) to the truck.

[@ldotmurray]

I thought that was the framework for the test. I was wondering how the extra weight and access heat from friction impacted fuel consumption with a "true" RWD.

[@Dyrtir1k]

With the prices of new trucks I would appreciate more base truck testing

[@pernell4351]

Wow nice number my brother have first generation with Z 71 Silverado he loves it he’s getting around 35 in town going back-and-forth to work doing 55 miles an hour sometimes is averaging 38. That was a shocker for him.

[@jamesmancuso3666]

31.2!! I have a 2016 4dr 5spd manual (including manual windows and locks)with a tiny 4cyl that gets 35+ avg. Amazing that a full size 4dr loaded truck can get anywhere near 30 much less more on average.

[@jaimeguajardo2294]

I really want to see if the Autostart/Autostop feature on GM trucks really helps. In stop and go traffic, I feel like the restart cost on fuel is greater tnan the savings provided by the shutoff. Unless I'm stopping at traffic lights for more than a minute, I don't think there's a benifit to the shutoff. I would love a video on this.

[@mindbonker]

2:50 if you don't have time for 30 seconds, you can grab the bed and shake the air up the spout and add the couple gallons extra... works like a charm

[@duramaxadventures5832]

the 3.0 is Very sensitive to load, so i do believe these results are accurate. that's why at 67mph a 2021 AT4 will avg 34 mpg but at 75 its ONLY 28

[@gunsandgranola7262]

My Trail Boss 3.0 is the same. Above 75 and she drinks heavy. (By heavy I mean under 28mpg) Below 75, it’s awesome.

[@lorainejenson1724]

nice . I drive my Yukon XL 4wd from northern to southern California on I5 and my best mpg so far is 32.9

[@FarrellMcGovern]

Great episode made even better with the Rush t-Shirt!

[@gadgetmantwincities]

The mpg is great however a gallon of diesel costs more plus def fluid. So it would be nice if you could compare the best gas powered version of the same truck and come up with a cost to run chart on all trucks🤠

[@jaysson1151]

The did do a cost per mile comparison about a year ago. Comparing the cost between an electric F150, a hybrid, V8, and a diesel.

[@ColeSpolaric]

Compared to what engine? The 6.2 recommends premium, the turbo 4 requires it I believe, the 5.3 takes regular but you'll probably get like 20 to 22mpg.

[@Dusdaddy]

@@ColeSpolaric GM recommends 87 for the 2.7L. What's more important is the consistent difference in price of diesel to gas in your area.

[@philipjohnson882]

Most of the time where I'm at diesel is same price as regular gas. This year for several months it was about 1 dollar more which compared to the 5.3 using regular equals pretty much same cost of operation including the def

[@Dusdaddy]

@@philipjohnson882 around here it's a solid $.90-1.00 more so not a great deal. Using the calculator on the EPA site shows about a $250 savings per year with the miles I drive and 5.3 or the same cost for the 2.7.

[@Georgejoseph74]

Our VW 2.0 3.5T diesel van does max 32mpg on a good run..Txs again for another fantastic video..by the way I’m pretty sure I counted more than 4 Toyota trucks pass u guys lol..

[@jetdust]

So many variables that can tweak those numbers up and down going either direction.

[@MidwayGuy]

Here's an idea. It's very nerdy, but it might make for an interesting series. "Max MPG." These are the rules: cruising speed of 60. No cruise. As we see at 15:00 your tires are under inflated which is not good for fuel consumption. They should be at max on the tire sidewall (my guess is 40-50 in this case) on all tires. Tonneau cover? Where possible. Then do a 100 mile loop and see what fuel mileage is compared to EPA and what you get running around at 75. I bet this truck could get 40 if driven with a light foot and topped off tire air pressure and tonneau.

[@JCreole]

That’s what EPA does….

[@gill998]

Why the sidewall pressure? If you put an e rated tire on a 1500 and fill it to 80psi, it'll never see the load required for that pressure and you'll end up with a worn center of the tread with lots of tread left at the sides. Always follow the door sticker. I've seen it and done it. Even my 2500 is currently sitting at 60psi rear when it calls for 80 on the door, I'll fill them up soon before the trailer goes on it this spring.

[@streetmuscle215]

I hope you get the same results as I did I have an elevation diesel and weather I'm in 2wd or awd I get the same about 28mpg and I reset my trip every time I fill up

[@shaunstuck3079]

You need to do a longer loop to get conclusive results

[@nlken7175]

This 3.0L is the best engine on the 1/2 ton market.

[@danielwilliams4473]

Fords 3.5 powerboost hybrid is the best 1/2 ton. I've always been a chevy/gmc guy until they kept making crapy vehicles. Now I have a 21 3.5 limited powerboost hybrid. Nothing out does that.

[@kaseyschaffer7692]

My 3.5 power boost is a complete lemon. Worst truck I’ve ever owned. Also, Ford leads the market in recalls. That’s probably why.

[@danielwilliams4473]

@Kasey Schaffer sorry to hear about your ford. Yes, all brand of vehicles will have problems. Chevy/gmc 5.3, 6.2 and I think, others, has a big problem with their lifters and some other problems.

[@samiaziz2665]

@@kaseyschaffer7692same here I made the mistake of buying a used one, since Jan 2020 I have added my repair costs from the twin turbo, fan air blower, infotainments screen it about $14,580 in just the past 2 1/2 years

[@danielwilliams4473]

@@samiaziz2665 was it under warranty?

[@nathannepple6221]

you guys should do the same thing with a 3.5l ecoboost

[@juicemac78]

What about regen? What if regen the second test session and not the first?

[@ericparker2816]

Love your content, just wanna put it out there that if the truck went into regen during the second run that could easily account for the mpg difference.

[@Jay-me7gw]

Good point. 5 mpg seems like an extreme amount to me. My 2014 F150 with 4Auto does not see anything close to that, not even a full 1 MPG running in 4Auto.

[@gill998]

You're probably right. My 2500 dmax avg over 100km is 10-11 L/100km highway, but rises way up to 18ish when it does a regen. And it's always in auto4wd. I don't see any difference when in 2wd

[@kylewren5756]

I own a King Ranch with Bluecruise and I was very interested in your comments in this video about Supercruise. Please tell me you are planning a detailed video demonstrating the Supercruise while you have this GMC? Thanks!

[@Jassman3536]

On the second run did you take into account if the truck went through a regen cycle??? Great vid guys

[@AkioWasRight]

Do they normally take into account regen? Nope.

[@dieseldrax]

It's unlikely they would've even noticed it going through regen, they're fairly hard to notice unless you know what to look/listen for.

[@AkioWasRight]

@@dieseldrax It's not difficult. You would see your instant MPG drop. Of course, the best way is by using an EGT gauge or a digital engine monitor.

[@8bajwa8]

@@dieseldrax you would know truck sound and smell different.

[@luke9020]

​@@8bajwa8 no it doesn't this isn't the age of old diesel. Without a gauge or monitor you wouldn't even know

[@MegaGeorge1948]

@ 31.2 MPG x 22 gallon tank capacity = 686.4 mile range until empty.

[@Jay-me7gw]

I dont see nearly that much of a decrease on my 2014 F150 Lariat. I see maybe a few tenths of an MPG. But I also have 35's so maybe I just have so much rolling resistance already that the front drivetrain is just a drop in the bucket.

[@MrJockoDundee]

I have the same drivetrain in my AT4. Mileage is accurate. I'd love to know why my 2.8L Canyon diesel sips DEF at about a 1:4 ratio as compared to the 3.0 L Sierra.

[@jkelley199]

Nathan, the Rush t-shirt is awesome!

[@aaronstanton3525]

I used to have an 02 4Runner that had RWD, AWD, traditional 4x4 high and low. There was not difference between running in RWD vs. AWD. I had a very consistent drive style and path and ran it over several tanks of fuel in both drive settings. I eventually just left it is AWD Because it got better traction. I want that transfer case back.

[@geoffmooregm]

My Sequoia does the same. It sucks Toyora went to the pickup truck transfer case in the new one. They should have put the Sequoia transfer case in the pickups. They struggle more with traction in the reain and snow.

[@gregferris9378]

My 1989 Jeep Cherokee limited had 4 wheel drive auto. We tried it out on Daytona Beach and the front tires dug in from the start.

[@Redsr5]

I just bought a 23 sle refresh with x31 and the 10speed with a 5.3

[@LyionsMountain]

Really happy with my Ltz lz0 I’ve gotten 16 towing a car as well

[@christophermcmichael880]

I would like to see a comparison to a strictly 2wd. In comparison to a 4wd in 2wd. Curious to know if the fuel milage would be different between the two 🤔 As far as the self driving part. I don't blame Nathan for hovering his hands over the wheel. I have all I can do to trust cruise control. LOL

[@lamarzimmermanmennonitefar5269]

Who remembers the Auto 4x4 that the old suburbans had? I'm wondering if this is the same idea? Different from a front wheel drive/ AWD, and Different from center diff AWD , like the Landcruiser 80 and 105 had.

[@charlesboetel1324]

Jeep had it in pickups with full time 4wd in the 70s. Gm and Ford and Dodge had it from the late 60s? Up when equipped with the np203 t case.

[@xiong2moua]

I own the 2020 gmc denali 2500HD and 2021 Chevy Z71 2500HD Diesel. Both started having issues when they got over 60k miles. Factory warranty sucks and GM don't want to cough up. Paid over $70k plus for each of them. DEF meter going out of wack...Tired of seeing coolant low light coming on...squeeking breaks...side camera went out of alignment, radio sometime has the blue screen, steering wheel knocking when driving in the mountains, coolant evaporating somewhere, etc. The only good thing is the large fuel tank and long distance capabilities.

[@joeperez583]

Pretty much RWD (Rear Wheel Drive) both times, just having different variables in both trips as far as wind direction, drag, stopping/slowing down and accelerating at different rates and places between the 2 trips. AWD is different than 4 Auto. 4 Auto simply is, when the truck detects slippage in traction i.e., the rear wheels just spinning because of being stuck or slipping on wet surfaces in general, it engages the 4WD (4 Wheel Drive) system, then turns it back off when traction is regained. 4 Auto may or may not have engaged when it was active for the second trip. AWD (All Wheel Drive) is a system in which a car's engine sends power to move all four wheels ALL THE TIME. AWD sends power to each wheel to help keep your vehicle driving better than a vehicle with just front-wheel drive or just rear-wheel drive only. AWD is active all the time, there is no turning it off or back on. Awesome video as always, guys. Keep up the good work. Love all the channels.

[@charlesboetel1324]

Audi found slight mpg improvement with it's awd system over standard front wheel drive. Most current awd/2wd/ 4wd systems spin all the drivetrain parts reguardless of which drive mode selected.

[@markcollins457]

I understand 4wd AWD and all variations are the must have in some parts of the country, but i think powering all 4 wheels and draging all that hardware down the highway I necessarily the best across the board. I have been calling some upsold over optioned cars/trucks "Mall Terran " vehicles for a reason. Give us a MPG 2wd versus 4wd engaged vs disengaged.

[@cbruno12180]

You guys really need to test a Chevy 1500 lt 2wd diesel they are getting 35 mpg at 72mph and can be bought for 55k loaded up pretty nicely

[@patmanz28]

That price is crazy

[@samhill3496]

Color, Dark Ash Metallic? Gota love that motor, needs a big tank for long distance, Alaska, Canada, other places. Maybe in and out in one tank. 15 to 20% different mileage. 32 vs 27, 5 mpg

[@ScottHBrown]

Funny, my 2001 Suburban LT had auto 4wd. Which engaged the front axle, and only sent power to the front axle when it sensed slip at the rear. Which, if I had to guess, is the same way the new system works.

[@Jay-me7gw]

Its not the same. The current GM and Ford 4Auto systems are an active AWD system and will send power to the front axle proactively. Slipping is not required.

[@machfive916]

Excellent video. Love the dynamic between Andre and Nathan as they really do complement one another. "We need more Nathan", just like the SNL parody of Blue Oyster Cult's Don't Fear the Reaper stated, "We need more cow bell." Let's let Nathan "explore the studio space. LOL

[@davedave2525]

I disagree, that Nathan cat seems like he or she would be a better fit being on a Bud light can!!! Now Andre is super cool and very enjoyable to watch. Another one that's hard to stomach is that so called Mr. Truck guy. They should to leave him on the side of the road and find another one more like Andre!!!

[@prestondeters5093]

GM has had automatic 4wd for years. Our 2005 with the 5.3 also had a noticeable drop in highway mileage with it engaged vs running in 2wd. Granted, the numbers were much lower than this diesel is able to achieve. It would maybe drop from 18 mpg down to 17 mpg. It engages the front hubs and all of that extra rotational drag on the system makes a difference. Not only are you getting drag from the CV axles spinning, but also the front diff and it's fluid.

[@streetmuscle215]

I think it's too short of a test cause I reset mine every time there's no diff between awd and 2wd could be the case there being an air bubble in the tank or the pump clicking off faster idk I fill mine when it gets to 1/4

[@krane15]

Did that pump say $3.59 and $4.29 per gal.? I can't remember when there was a 3 at the beginning of the price for gas. Here in soCAL its like $5.50-6.50 at Shell.

[@rvingmylifeaway8295]

The most I've got is 38mpg on my 2020gmc sierra 1500 3.0l duramax diesel

[@RobCabreraCh]

I drive my RAM mostly in RWD. I really dislike the sensation of driving on 4WD Auto. The front tires kick in on turns and everytime I get on the gas, and it just feels off. The truck just understeers a lot more, and by consequence, it just feels heavier. I can't carry as much speed on corners either, not that I carry too much speed on corners, but there is a noticeable difference. Because of this, I keep my truck in RWD, even when it is raining. I only put it in 4WD Auto when we get extremelh heavy rain, and the truck wants to spin everywhere.

[@svpracer98]

Not exactly groud braking stuff... I have the auto 4wd system in my v6 canyon, and I usually lose 3 to 5 mpg in the winter with it engaged. After getting all terrain tires last summer, I had plenty of traction to only really need auto 4wd on the really icy/ snowy days.

[@andrewmartin8130]

So while using super cruise and there is an obstacle in the road such as a pallet, road kill or a blow out tire will it change lanes to avoid hitting it?

[@jnk26]

The 4A setting set the axle locks on but has a clutch that disingages the output from the front of the transfer case. So there are loses on the front axle always engaged to the wheels. For the added conveince its not worth it to me, the cost and added complexity then repair after warranty, is a no thanks for me. I'll keep the regluar 4wd system that are complicated enough(Electronic shifting)

[@duramaxadventures5832]

the non auto GM unit still has teh front drive clutch only raptor (and that one tremor trim) have an old school lock

[@kickflipdemon]

1:31 the gas pump portion is in mono

[@Oc3anMaster]

Every GM dealer that I've been to has said that the Super Cruise is nearly impossible to get on any new trucks right now due to the chip shortage.

[@duramaxadventures5832]

on 1500 it has a front drive clutch pack in teh transfer case that can send between 0 and 50% power to the front depending on teh condition. THUS AWD. it can and does do 30:70

[@michaeltaulbee1996]

So does the fuel gauge account for that difference that the computer is reading than the mpg you’re actually getting

[@guamazolopez6456]

first time i see a truck under estimate the mpg it’s getting by that much

[@TheCarCrazyGuy]

Are you sure you didn’t have a regen during the second run?

[@gorillaplays8926]

Wheres the shifter at..I don't see a column shifter..or is it a rotary shifter like Ram

[@secondcreekworkshop3908]

Gm should make the diesel available on all configurations of the Silverado and Sierra.

[@blainekenndy2366]

And just so you know whenever you have it in two wheel drive there's only one tire pushing and that's on the passenger side it has to slip one complete revolution in order for the other Tire to kick in limited slip differential

[@quincycuthbert5408]

I am looking to buy a truck next year but I keep hearing the diesel engines started having bad issues after 3 years. Is there any truth to that?

[@jordanalexander615]

My truck has 4wd but the shafts turn regardless if it's engaged which kills the fuel economy. Apparently there's a conversion kit to change this though.

[@yashveersingh1795]

Loved the video 🤓😍

[@marklacombe2671]

Personally a luxury truck makes sense or something close. My family refuses to fly so road trips to see family east coast and west coast are the only option. With how often we do it a smaller travel trailer for cooking and sleeping offsets the cost of hotels. While a comfortable quiet truck would make 1000 miles a day go by easily.

[@robinpaglomutan9316]

Andre's face at 8:56 made me laugh 🤣

[@alwaysawn9110]

I would be curious if you repeated this in full time 4 high and if you could do some kind of city test for these.

[@dieseldrax]

Hi TFL. FWIW, 4Auto here is full-time 4WD and not AWD. There are distinct differences between the two, the biggest of which is whether or not the vehicle has a dual-speed transfer case and the ability to lock the t-case into 4H or 4L. AWD has a single speed and no way to lock the front and rear outputs together. 2H = 2WD 4Auto = Full-time 4WD 4H = Part-time 4WD high-range 4L = Part-time 4WD low-range Love the 4Auto in my Canyon, it's awesome in the winter. Thanks for the time an effort you all put into the content!

[@paulcorazza3282]

You will need to be careful running it in auto mode for long periods because you’ll need to replace the front transfercase. I drove our 16 Nissan pathfinder in auto all year round and had to replace the front case, but we got great gas mileage

[@KRuslan1000]

My ecodiesel at 70k gets 17mpg Highway. They get good MPG when they're new. After that EGR and DPF gets clogged

[@Silverback_GMT410]

I find it interesting that on the new Ford Ranger, Ford labels the lesser drive system as 4x4 and the upgraded drive system as 4WD on the tailgate.

[@xiong2moua]

What happens if the a tire blows without holding on to the steering wheel on super cruise?

[@wd9581]

8:53 😂it's massaging my butt.. I love it😅

[@mycvil]

They are certain it wasn't doing a regen during any part of the "test"? - I wouldn't expect a 10% difference because of the front driveshaft spinning. - And a true test should be 4 runs back to back 2 - AUTO - AUTO - 2 - Averaging it all to accommodate the temp/weather changes as they go. You can hardly get a good comparison with only 2 gallons or less of usage.

[@gregbrammer336]

Does this truck have tow haul My 2023 trail boss doesn’t have tow haul mode

[@VTXHobbit]

I thought 2-HI was the default driving and AUTO for slick roads or gravel. Of course the fuel mileage would be best in 2-HI

[@tomcardale5596]

All wheel drive really isn't new at all. Land Rover have been doing it since the 80s in commercial vehicles (70s in the Range Rover). Mitsubishi have had it for decades in the Triton/L200 too. I think it's a big safety boost and I hate the handling of my Landie when the front is disconnected. It's also a big bonus having access to low range without the centre locked. But yes, nuts to not have full time 4x4 engaged all the time IMO, I don't see the point in even having the 2wd setting unless you can select front and rear axles separately.

[@pruitt3507]

1999/2000 had Auto 4wd, high and low in the chevy k1500’s

[@scottyellis3442]

Like these MPG test, they're interesting. But anyone that can afford one of these trucks i really don't think they're worried about 4 or 5 miles difference.

[@jonathans4503]

I can afford it but still worried about the difference. Money doesn't grow on trees, even if you have a lot. You still worked hard for it.

[@gonzaloquinones5388]

To explain a little better awd will always consume more fuel do to more power distribuation to all four wheels witch means more power lose in drivetrain instead of going just to 2 wheels now it goes to 4 but thats why you can disengage it for fuel economy

[@rec3d582]

By my calculations 66.0 divide by 2.051 = 32.179 mpg

[@dawudgt]

Great Video, Thanks 🙏🏻 Please the same test with the 2500 HD 👍🏻👍🏻👍🏻👍🏻