Mudding, Towing & Hauling Payload in the GMC Sierra AT4 + Torture Testing a CarbonPro Bed!

[@TruckKing]

Hi folks! We try and go in-depth here on Truck King, sparing no detail, which makes the videos a little long. From now on, we'll include a glossary in the description so you can navigate to a specific test. Here is the glossary for this video: Walkaround - 1:06 In-Depth Look at CarbonPro - 2:22 Sierra AT4 Pricing - 4:16 CarbonPro Easter Egg - 6:07 Payload test - 10:27 Towing test - 15:32 Off-Road test - 22:28

[@skyline5354]

Great video! This is a beaut of a truck! And thanks for including the empty mileage loop. Can’t wait for your next video

[@broboy666]

hey truck king on that empty fuel economy loop I happen to notice you were in Orillia I didn't know you were around this neck of the woods. You'll have to pop by one day and check out my 17 power wagon Laramie some time

[@broboy666]

@@TFT-bp8zk really? you must have alot of time on your hands to say a boring ass comment like that

[@rondail5675]

Steven, more information is better than less. Keep up the good work 😃

[@richardmahoney9415]

Love the reviews I like this guys truck reviews no matter the channel he’s on

[@dannyg5636]

I honestly have almost always preferred the front end on the Sierra over the Silverado.

[@Em_jiggy]

Love them both but kinda lean towards the Silverado. I’d get the AT4 with that duramax though since it’s not offered on the trail boss.

[@brado647]

@@Em_jiggy I agree. But I wish they would offer the diesel on the Trail Boss. It's my hard earned money i using to purchase there products. Why not let the customer decide what version is best for them.

[@2004moneymike]

definitely now i hate the look on the 2020 Silverado i pray that they don't do the same to the gmc

[@jaymoar3561]

Isn’t the Sierra a luxury Silverado?

[@2004moneymike]

​@@jaymoar3561 yes

[@miscellania4263]

That 'Connor's Way' Easter egg is really cool. Kudos to their amazing design team and capable engineers

[@kirk9899]

No spiders were hurt either. I saw him crawling away after the block stopped moving. lol

[@clwade10]

You really nailed this review! Very enjoyable to watch and you covered everything im interested in. Specs, price, cool features, driving feel and impressions under load, EPA economy loaded and unloaded and of course offroading it through the hydro line! Love the channel bud!

[@TruckKing]

Much appreciated!

[@frankmartinez9419]

Honestly, one of the best reviews I’ve seen on a truck. This is the type of stuff real truck drivers like to see and know about. Keep it up!! 💯💯 really love this AT4, have had mine for about 2 weeks and love every single thing about it.

[@TruckKing]

Glad you enjoyed it!

[@lolotus4borderless]

Looking for a truck review by guys who understand it 100%, there are no other place on the internet, thank you truck king!

[@TruckKing]

I appreciate that!

[@DH-mp6fg]

Beautiful truck, love it. Almost 100k for a truck is crazy.

[@Offshore1977]

Loved my Tacoma composite bed. Put in a rubber mat and had amazing grip. Great to see your dad in the videos. It will make great memories. You guys have the same voice.

[@mikefoehr235]

You beat me to it👍

[@TruckKing]

Appreciate the sentiment - but I'm not dead yet. Dad

[@doktordice9219]

My new favourite channel for truck reviews :). You guys do sooo much more than just show the engine and bed and interior . Keep up the amazing work !!!

[@24kgraham]

just bought the same truck a few weeks ago, I'm still learning all of the features and Easter eggs... great video and I can honestly say this is the best vehicle I have ever owned.. and I have owned over 100 vehicles.. including the monster dually in my profile picture. You really get the best of all worlds, great gas mileage, superior comfort and tech, great off road capabilities from the factory, while not compromising the ride.GMC nailed this one!!

[@elonmust7470]

You are cattle. Any truck that puts the SAME SEATS in every vehicle across the line is not anywhere near "superior comfort"....

[@24kgraham]

Cattle? What do you drive fuck stick.. a bad ass f-150..or a super cool Tesla.

[@jermsman18]

Out of all the half tons this is my favorite.

[@Jordan-D26]

I bought a 2020 At4 with the 6.2 in it. Msrp was 68k, has everything but the carbon pro bed. Chose it over a Denali because of the capability and less chrome. The only real difference is the off-road package and the At4 has carbon fiber inserts in the door handholds. Great truck, would highly recommend. Towed a 4200lb car when I moved with it on a car trailer and averaged 14.1mpg on varying grades over 320 miles.

[@j.a.vzlaib1170]

Jordan DiSano that’s a real review. Nice fuel economy considering the big (brilliant) engine

[@Em_jiggy]

Damn that’s really good bro. My 5.3 with 20x12’s gets 15mpg highway at best

[@Jordan-D26]

Yeah, I was actually pretty surprised. I think obviously the 10 speed helps out quite a bit.

[@truckingoover]

Nice to hear from a real buyer....to many people whining about price....will never own one anyways

[@Jordan-D26]

Probably should mention that MSRP was 68K, I took the 6K off instead of the 72 months zero APR because I"m planning on paying it off early and I had a supplier discount that brought it down to 56K. I think every review I've seen of this truck misses the driving modes. Obviously the trailering mode, its great you can customize what your towing and save the presets. There's also three selectable modes, Normal, Sport and Off-road. There's very noticeable differences between the three.

[@BeanoNoir]

Also a Suggestion with these half tons is to start using the travel trailer as a test bench. Most people buying half tons are towing high profile trailers like travel trailers, and that would give them a more realistic expectation of fuel economy towing with wind resistance. Flatbeds are easy to load for weight, but they really don't have any resistance other than rolling. You could also get a better idea for how the trucks handle sway, as TTs are notoriously easy to get swaying, as well as to improperly load.

[@sportshot2789]

Frontal area for trailers creates a lot of drag. That’s why semi tractor trailers have aerodynamic packages

[@doc.christopherthompson324]

. Yes, & it's The wind resistance, that's bad for gas mileage. HA.HA.HA

[@ricwestdoesitwork]

Great review of the Sierra AT4. The Sierra is an awesome looking Truck and that carbon fiber bed is really nice. Thanks to you and your Dad for the review.

[@andysmith5220]

I've had my white one since December and love it every day. Consistency get mid 20's to 26mpg city 31 highway. Has more options than I'll ever use too

[@poppyneese1811]

Them Canadian Duke boys is running shine again,,,,,,,,,, yeehoo!!!

[@glenmacdonald2044]

to you Americans it is yeehoo EH

[@jeffthomson1777]

Love my At4 carbon pro and the 6.2L engine great truck so far

[@bennyb6071]

still happy with the truck? seriously thinking about the same truck

[@cl3410]

Me too. Had mine for a year now. Choose it over a Raptor and Tundra TRD Pro.

[@bigmando78]

Happy with my carbon pro with 6.2 also

[@jofoto612]

love this channel and the reviews. I’m so glad you don’t compare every truck to a “Raptor” like the other channel

[@TruckKing]

I appreciate that!

[@ricardopelo6385]

I would like to see reviews towing a 7000lb camper. How much of a factor wind resistance and sway affect the towing experience vs a flat trailer with the same weight.

[@SelmerVidz1]

TTs are a great towing test, and we're going to do some more coming up. The flat decks and concrete are here to stay, but we'll try and mix it up a bit.

[@jasonb8769]

I have a 2019 AT4. I tow a 28 foot 6,800lbs Jayco. That's without all my gear. With gear I estimate about another 500 lbs. The Truck does really well 60 mph and slower. Above that I get some sway. I do have a tow hitch that helps with weight and sway.

[@88mtb88]

Your content is getting better. Keep it up

[@TruckKing]

Appreciate it!

[@ryanrobertson5457]

I live in British Columbia and have the same truck, minus the Carbon Pro. It is amazing!

[@getlosttoday4045]

Always love the hydro line off road! Great job 👏 👍

[@Brigade73]

Liked the vid! The AT4 has been on my radar for the past 2 months. The RAM 1500 Laramie has been my #1 pick, but the AT4 is slowly becoming my fav!!

[@user-Kdaddy]

Blows my mind how far technology has come.

[@MP_-ek8ij]

“No concrete blocks were hurt “ lol good one 👍🏼

[@SquareGoated]

Something I have realized on ram truck is when you tow a heavy trailer it sort of makes the whole truck sit lower even in the front although it’s is still lower in the back because of the weight

[@irvingv4177]

I was sad to see you go on tfl but I’m sooo happy to see you keep doing what you love keeping us informed with quality content

[@TruckKing]

I appreciate that

[@kevinblock2307]

Love these reviews - great job guys

[@M-.-Jones]

Although I'm Canadian I'd be inclined to do everything in US units, add metric in afterwards. Ultimately the US is where the bulk of your views will eventually come from.

[@bennyb6071]

@Tsang Tsung you put fuel in Litres, and drive in Kilometers, grow up

[@MidniteLiquid]

This is the same truck I have, but mine is finished in Summit White. I LOVE this truck!

[@giermob11]

What about the spider? Was it hurt? 😆 🤣

[@TruckKing]

We never saw the spider till the edit. He was booking it though...

[@craigquann]

My 17 sierra is rated for 1890lbs payload.... I've had a cubic yard of 2" round river rock. And 3 adults. (3000lb of rock and 600 of people. Still wasn't down to the bump stops. Payload is wwwaaaayyyy underrated on these trucks. (P-rated tires are the Achilles heal on most)

[@woffordsoverlandjourneys8618]

Love when you get sound up going offroad "!! Beautiful future journalist you have there"!!!

[@TruckKing]

Thank you kindly!

[@jredd801]

A guy can really appreciate that work bench tailgate

[@9663mu]

Nice one bud. Hoping to see some F150s being tested as well. Keep up the great work

[@TramaineleDay5655]

Always like how indepth you went into the reviews even when you were with TFL. Somewhat better knowledge of the vehicles! Still like TFL, but have to give it to Truck King

[@TruckKing]

More to come!

[@Dm-dw3tr]

I come for the off-road and capability testing. Not just a walk around.

[@TramaineleDay5655]

Definitely capabilities testing

[@stout_tossme7541]

So, I love your dad's approach. No BS. Direct. My kids say I am the same way. Lol.

[@boscoyeaux22]

Got my at4 duramax ordered. Can’t wait. Thanks for the video

[@Rob.Brown13]

Just placed my order for my 2021 Sierra at4 but I just got the preferred package and technology package. The carbon bed just seems to expensive for what it is. Plus I got mine at $68k with discounts due to truck month! Can't wait to get it and thanks for the great review!

[@melanieg567]

Rob - do you love the truck?

[@PWlangford1]

Thats a beauty. Love GMC. 🇨🇦

[@bearatts]

I have a feeling that those beds aren't going to look too good in the future when the truck is 10+ years old. I know not many people care about that, but I'm a guy who likes to hold on to his vehicles for a while. I've had my 16 year old dodge ram for 10 years.

[@jface3806]

Current own and love a Duramax Canyon AT. But this truck is going to be real tempting in a couple years....thanks for the review!

[@achap6376]

Really enjoy your channel, great review. Thanks for taking the time.

[@TruckKing]

Thanks for watching!

[@jaymoar3561]

Isn’t this the guy from TFL?

[@TruckKing]

Yep! But not anymore. Just reviewing trucks and off-road gear here on Truck King now.

[@jaymoar3561]

Truck King cool doing your own thing.

[@fredwalker839]

Thanks for the videos on the New 3.0L Duramax! Am retiring this summer(72) had many new 6.6 Duramax GM’s! Time to downscale back to 1500 1/2 ton.Want …. don’t need a diesel. but want one! Thanks to your vids. I’m in! Base model for me! Don’t need all bells & whistle @ this time of my life! Have allways had a new pick up ! Why change now,,, I get it from the “ get go!” Again thanks,, helped with my choice!

[@TruckKing]

Good luck!

[@damiangutierrez9103]

Slippery is good to sly in sheets of drywall because drywall could break easley if you try to sly it on a bed that has spread in bedliner. In your older video with TFL you first said your not a big fan of the multi tailgate.

[@lambertsaldi1550]

You two are great folks 👍👍 What too hell 🤣🤣👍 Keep up the Great Stuff guys! The Vermonter

[@1badpete999]

Try the concrete block drop when the bed is frozen at -30 lol in average canadian day winters

[@TruckKing]

If we get a chance we will

[@EverydayJ1786]

That wax coated frame is already rusting .... That's honestly a Deal breaker

[@thesuppcollector]

Every gm truck since at least the 90s. The real pain in the ass is if you want to use POR or most other non oil coatings, you have to strip all that wax off the frame. Talk about a huge effing PITA

[@jaymoar3561]

Evan Barnett No you don’t, on Fluid Film or Krown you can just spray over that stuff and it’ll soften the rubberized undercoating and seep thru the bare metal. Also it’ll weaken the coating and eventually come off itself. Happened in my vehicles and you can look it up also.

[@ShaftDrive]

This is the only GM product that would steer me away from my BMW X5 diesel. The in-line engines are great. 9.5 l/100 are what immer getting in city 7/100 highway. This is great for a full size truck.

[@zdziskurek6245]

In such professional review I would show pricing not like reading newspaper but rather like at least scanned to pdf file shown on the screen.

[@Gennadiy475]

I wish they made this carbon pro for the heavy duty trucks. Would be nice

[@filup7419]

At 3:42 you say that you don't lose any functionality with the Carbon Pro bed but I disagree. With the sloped transition from the bed sides to the bottom of the bed rails, you cannot mount a camper shell because there is no where to put the clamps. You can get creative and use one of the tie down hooks to secure the shell to the bed but then you would be losing "functionality" of a bed anchor point. Aside from this one oversight, good review. I have a 2020 Chevy 3.0 4x4 and love it.

[@BeanoNoir]

Carbon fill PA6. It's Nylon with carbon fiber impregnated. Very durable stuff though. As strong as Aluminum, but much lighter, so you can lay it on thick. Even though plastic is usually cheap, this is about as expensive as stamped steel, due to the fiber fill tearing up the molds much faster.

[@thinkingape7655]

I appreciate the review and the mpg conversion. Many thanks 🙏

[@TruckKing]

No problem 👍

[@wipatriot510]

Nice truck, I have the 2020 3500 HD AT4 version...All in all, despite capacity/power differences they're comparable... Having my truck since 5/11/2020, IF I could could have just one "techie" item, it'd be that rear view mirror camera, that is my favorite... Tires, mine came with Goodyear Trailrunner AT, which were not the caliber of tire that belongs on this caliber of truck, so I had them replaced with(with less than 3000 miles) Bridgestone Dueler Revo 3, which are more commensurate to the truck of this caliber...I have been running Bridgestone Dueler AT Revo's for the last 18yrs, starting with the original Duelers, going into the Revo 2, and now the Revo 3, the 3rd iteration of that tire line...

[@tewksburydriver8624]

60k is just too much money for most people. Buy a 40-45k truck and you will be fine.

[@johnnynguyen9449]

Honestly I think a serria slt 4x4 with your own 2 in lift and offroad tires is gonna be the same as the at4 but cheaper

[@craigquann]

base model v6 engine is plenty of power too. Can save a whole bunch of cash there too.

[@james2042]

@@craigquann 2.7 turbo is cheaper than the v6 by about 1k

[@craigquann]

@@james2042 uh... cheaper than the diesel straight 6 yes. Base 4.3L v6 is cheaper and only available on lower trims

[@james2042]

@@craigquann they updated the pricing but the 2.7 turbo is still cheaper than the 4.3 v6 by a few hundred dollars, it produces more power and torque, will be able to officially tow 9k in 2021 models and is available in all lower end trims of the silverado and sierra with the exception of the custom trailboss. This includes the base trims as the marketed absolute starting price for both silverado and sierra are a rwd 2.7t truck

[@justinfowler2857]

According to GM: All our vehicles are safe. We'd never put faulty parts to save 50 cents.

[@paulpowell9595]

I'd rather have a Ford, yes I've heard they have transmission issues but I'd rather have transmission issues than fake parts

[@lanceripplinger8352]

RIP tailgate if you forget you have a hitch on the truck.

[@thomplatt8945]

How could you be standing at the tailgate and forget you have a hitch on? Lol

[@doc.christopherthompson324]

@@thomplatt8945 . Just like y would any person, vote Biden & Harris. HA.HA.HA

[@chipchiptalks365]

Put a tow hitch in with the tow ball and then open the tollgate like you did at 9 minutes and 30 seconds

[@doug2445]

Almost hurt that Spider , You at least disturbed his home..LOL 7:21

[@awesome2268]

Can you do an F-150 with the FX4 package?

[@noaheh8840]

I love the canadian content!🇨🇦 even better that its in ontario👍👍

[@bcoats316]

You almost killed that spider 🤣🤣

[@TruckKing]

Oh he's fine...just a little spooked!

[@BenMarar]

Great job guys! I am getting this truck in red!

[@TruckKing]

Good luck!

[@kane6106]

Great review!

[@rustyredram7197]

I do like the tailgate but I wish that Ram would have included the pop up load extender, that would have made Ram favorite tailgate.

[@andrewjackson8409]

Love your reviews! I'd really like to hear more of the engine sounds in your future videos.

[@TruckKing]

Noted!

[@jacobivy2854]

I just subscribed; are you still doing work with the TFL guys? I always loved the off reading you did in Canada. It actually looks a lot closer to the muddy off roading you tend to find here in the southeastern US than anything I’ve seen them run out west.

[@TruckKing]

Truck King is my family channel here in Canada. Finished with TFL - all Truck King now.

[@Cbat124]

Great video!

[@youarerightboss]

Great job, Steve. Another 👍

[@someonethatwatchesyoutube2953]

I’m seriously considering getting one of these and would buy the Duramax over the 6.2 in a heartbeat if it didn’t have all the complicated and expensive emissions equipment attached to it.

[@foxbodyguyeightyeight3672]

Warranty my friend

[@SSBARBEL]

Great Review - Well Done! Thank you!

[@TruckKing]

Glad it was helpful!

[@mannyb4959]

Great video. At 19:10 the truck wheels look like they are going in reverse. The trailer wheels look like they are going forward..... Isn't science fun?

[@uh60ce1]

Love the tailgate. Wish they had put one like it on the Zr2. But hey can't always get what you want. I'll take the front locker over the tailgate any day.

[@nowayoutstp4]

The z71 sport comes with noisy tires too I believe.

[@glenmacdonald2044]

The AT4 is basically a Z71 with a lift kit

[@andyh8239]

a 3100lb pallet of concrete in the bed. Can you expect to make rounds without permanent damage in this 1500?

[@toddbunnett640]

Well, I’m sold.

[@aroundthegroundlandscaping7107]

Why not hook up your camper and test fuel milage?

[@SelmerVidz1]

The camper you see in the video doesn't belong to us. We let a family friend store it there, and I wouldn't risk any damage using it. We've got some more travel trailer towing videos coming though, so stay tuned.

[@savann.sun1980]

i want one. my heart is pumping hard just watching that truck.

[@mikerobbins5049]

My next truck for sure... Maybe a 2022...

[@letsbehonest6311]

Another great review! There’s a couple at4s in my neighborhood and they’re a head turner....or maybe it’s just me lol.

[@caseyschmidt6532]

I lease a 2016 Ram Bighorn. 25k miles. I can buy it out for 26k. I’ve been looking at new trucks. God the AT4 and the elevation are soooo nice. Oh my. But so much money. Even the Rams have went up since they messed with the suspension. Ram used to be a great deal. Now a Rebel is the same price as a AT4. I don’t know what to do. I don’t feel like spending and extra 35k. My big horn has EVERYTHING. I think it’ll last me another 5 years

[@REBooner30]

Just stumbled across your awesome channel. Awesome review! Sounds like the new diesel and AT4 are a winning combo and incentives are $8-$10k off until early January. A 2500HD Duramax is overkill for my needs so this might be the answer.

[@TruckKing]

Welcome aboard!

[@gregoryf9299]

Definitely an awesome truck. But I’m worried the CarbonPro can limit what you can attach. I’ve seen some tonneau covers that are compatible but haven’t seen any caps or racks get fitted.

[@gregoryf9299]

It looks like clamps would work but hard to tell from these vids.

[@evilcnil]

Good truck, still the timing belt on the backside of the engine bothers me.

[@ibuiltmineo1oo]

The next gen motor has over 300hp. I'm curious to see what you guys think of the upgrade.

[@eliteaviators]

Great content

[@robertsmith1768]

I’m very clumsy. That multifunction tailgate would cause me too many injuries. Lol

[@kaisato-franks8908]

Great vid!

[@tony47862]

That diesels not even broken in yet, Mpg’s will improve. I’ve gotten my 3.0 duramax at4 down to 7.1L/100 km on highway driving.

[@iggy-pg6gq]

How are you liking the at4 and duramax configuration? I'm considering getting one once I ditch my gas guzzling Tundra

[@T7J2003]

My wife/accounts payable dept gave me the purchase approval!

[@ricardog8206]

I have a Sierra I was going to add those wheels and tires, which tires would you recommend instead of the duratrac. I’d like the off road performance but less road noise.

[@JohnSmith-ev1sm]

Why is there a 2 second difference between the 2 diesels? 0 - 50 is 3.6 in the one and 5.3 in the other, yet both have identical 0 - 100. Something seems off there.

[@geezusmeatball1328]

maybe gearing options

[@kurtbakalar3974]

Better than the 5.3or 6.2 with the push rod issues and lifter issues the last thing you want on your new 65.000 +truck is problems or getting stuck, broke down !

[@TheRooSkittler]

No concrete blocks where hurt but that spider looked pretty freaked out

[@Hayabusa-or2yo]

That spider said, "what the hell".

[@joseperezpaz9986]

Amazing looking trucks! If only they made them reliable 😏

[@dlhailey636]

You actually do loose functionality with carbon pro bed It does not have the pop op ports on the side of the bed That would allow to you run wiring neatly through the bed

[@JHoll84]

Would you be able to test the off-road chops of the gm single speed transfer case with the 2.7l turbo engine in GMC or chevy? Would love to see the limitations! Keep up the great content. Stay safe.

[@TruckKing]

We will test whatever we can get our hands on. Who knows?