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I use tow/haul mode every time I'm towing heavy. Starts you off in 1st gear and changes the shift points to keep the RPM's up. If pulling a light trailer, I wouldn't even bother, as it's just going to hurt your fuel economy without providing much benefit. The exhaust brake only really shines when going down some long steep grades, like in the mountains. I've made it a habit to turn it on whenever I'm putting it in tow/haul mode and just leave it on. It doesn't hurt anything to leave it on, as it only works when necessary.

I've been wondering the same thing. My '14 had the USB plugs right under the lid, which was quite handy. For now I've been using a 12v USB adapter to take care of the passengers charging needs. I tried using the 2nd front USB (USB C) port, but that just ends up taking over Carplay functionality and it was easier to get a 12v adapter than find a power only USB cable.

Speed is the killer of MPG when towing. I've found that if I don't try keeping up with traffic I average 12-14 mpg on the highway towing my travel trailer of about the same weight. The worst mileage I've had was towing through the mountains and that was still 10-11 mpg. If you are relying upon your truck's display for MPG average, you might try hand calculating to see if it's just too far off. Something else to consider is how you have your rig setup. The travel trailer should set level as possible while towing. Check tire pressures on truck and trailer, low pressure can lead to poor MPG. Tire or suspension modifications definitely, such as a lift/level can set you back too. I remember replacing my truck tires with a lot more aggressive tread and I dropped about 1 MPG.

I would doubt that Chevy would handicap themselves like that. Out of curiosity I read the owners manual on a 2022 Ford F-250 and it states “The trailer tongue weight should never exceed 10% of the maximum towing capacity when towing a conventional trailer, and should never exceed 15% of the maximum towing capacity when towing a fifth-wheel or gooseneck trailer.”. Looks like Chevy is just doing us a favor by putting it on the sticker.

From what I can see the conventional max tongue weight is 10% of the max towing capacity and 15% for the gooseneck max tongue weight that you see on your sticker. My truck is a '21 CCSB Duramax, 18,500 max towing = 1850 conventional max tongue and 2775 gooseneck max tongue weight. Gas has a bit lower towing capacity and so those numbers are lower. I don't know how the other brands figure their numbers, but would be curious if they are more than the 10%/15% numbers I'm seeing for our trucks.

These trucks have the aerodynamics of a brick, weigh 3+ tons, and most upgrades/mods people do on these forums only increase drag/weight. The window stickers didn't even include fuel economy numbers when we purchased our trucks. That being said, I'm mostly just burying my head in the sand ... like fueling up at 1/2 a tank to pretend it's not going to cost over $100 to fill up.

Definitely an issue with the build software on their website. I tried to build my same truck (2021) using the 2022 model year and every time I pick 20" wheels/tires it forces me to choose the lowered 10k gvwr. Follow those exact same steps when building a 2021 and asks you to chose between the lowered 10k gvwr and 11,350 gvwr.

There are 2 different IOR radios, the one that comes standard on the WT/Custom and the one that comes on the LT. They are the same radio, but the LT's is 8" instead of 7". So if you are just looking for the bigger screen, you'd probably save money and time by getting the bigger screen IOR radio. No matter what you do, you'll have to replace the bezel, as the 8" screen won't fit. Looking at the interiors on chevy's website and the button layouts look different, so not sure what that would mean for getting the right bezel.

Seems like a neat setup and I like how it integrates with the radio. Sadly not something I'd be able to use since my radio is an IOR. Guess I'll have to stick with my usual method ... a wife with a two-way radio in hand. Not ideal, but she'll do.

I don't have my build sheet, so I dug out my window sticker and it indeed has the snow plow prep/camper package listed. So you are right, I'm just an idiot and overlooked/forgot it was on there. I lookup and keep a spreadsheet of all the RPO codes of my vehicles I own and that's what I was referencing to see if I had the snow plow package. My truck does not have the "VYU - PROVISIONS-SNOW PLOW PREP" or the "WMI - SHUTTERS-FRONT GRILLE, ACTIVE, UPR AND LWR" RPO codes which is why I was mistaken.

Now I'm a little curious myself. I have a '21 2500hd LT without snowplow prep package and I do not have active aero shutters. Curious what's change for 2021 or if they decided they weren't worth the trouble after only having them on the HD trucks for 1 year.

For the OEM the convex mirrors are manual adjustment. There might be a 3rd party mirror option that includes electronic adjustment of the convex mirrors, but it's not something I've looked into. I'd honestly love to have a fully electronic mirror with electronic controlled top mirror, convex, and extend, but I make do with what I have.

Pictures are showing up correctly now. Seems like a good use of space, since the scoop is just for show on the gas trucks. Not usually a big fan of cutting into a vehicle like that, but your install is clean which makes it look good.

There doesn't seem to be any rhyme or reason for how they add LED lights to these trucks. Custom gets LED tail lights and LT can get LED headlights if you get the right package. If you want front and rear you have to go up to at least the LTZ trim. Maybe that's the point, it gets people to consider spending more for the higher trims/packages.

I got the Chevy all weather mats with my truck and so far they've done really well. I liked them for the same reason, they cover the middle hump, which is nice when it's muddy out and I have one of my kids sitting in the middle. We tend to do a lot of outdoor activities that can get messy and it's nice being able to just pull out the mats, hose them off, and put them back in. They don't necessarily come out super easy due to the odd shape, I move the seats back to make it easier. The fitment of the mats is surprisingly well, they don't slide around, and have done well containing all the dirt and sand. Not sure about longevity on these mats, since I haven't had them even a year yet, but only time will tell. Not sure what other options are out there, since I liked the Chevy mats.

Same warning doesn't show up in the 2020 user manual, so I'm guessing it's a problem discovered before releasing the 2021's.

I must have skipped over that part when I was looking through my manual, but it's really in there. If I were to hazard a guess, it's probably related to the variable steering on the higher level trims. Pressing the brake and throttle at the same time probably is a confusing thing for a system that trying to adjust based upon how you're driving.

I've not found a use for it except maybe using it to update the radio firmware. Honestly not sure why it's even an option since updates are extremely rare and you can normally do them utilizing a USB flash drive.

Do exactly what bird_dog0347 suggested. It definitely makes for a big improvement on brake feel and I've pretty much forgotten that it was an issue since I performed those steps myself a few weeks ago. Not sure why it works, but it does.

Oh I agree, I miss having that basic feature. I was like you and had assumed it would be there since I had the 8" radio with the DIC, but the more I looked into it I learned it isn't available on my truck with the radio I have.

I don't have the option either in my '21 2500 LT. If I'm not mistaken, I believe you have to have the upgraded radio in order to have that option. The standard 8" LT radio (IOR) isn't really much more than the radio that comes in the WT models, just with a larger screen. I believe you need to have their HD radio (IOS) at a minimum to get it and I'm certain their premium radio (IOT) has it.

This is what I need to do one of these days, I really don't like the look of having the halogens with the LED fogs.

Very much depends on trim and/or what packages are added. Example, the LT trim Allstar and Texas edition packages come with the LED fog lights, but do not upgrade the headlights to LED.

There's a 13" difference between the two. Your current bed should be 5'8" and the 2500 is 6'9".

Checked out Vertex's website and they state the covers don't effect the normal operation of seat heaters. I hadn't considered getting covers in the past since they tend fit bad, but I'm reconsidering after seeing your covers. Thanks for the info.