MTU Alum

The 2024 camera is different than 2020 to 2023 camera. They are not compatible. #iworkforGM

Oshawa only builds crew cab standard box Chevy. Flint builds everything else including what Oshawa builds. Both plants are good. Oshawa has been struggling getting things shipped due to train and truck shortages. #iworkforGM

The frames are the same from a structure standpoint. Flint can only handle 15 different frames. The only difference on one of the 2500 frames is they cost save a few fasteners out of it that are used for 3500 unique leaf springs. #iworkforGM

The ride is the same between Z85 and Z71. There are two packages that increase the FGAWR and front torsion bar size: F60 Heavy Front Suspension / Camper Pkg and VYU Snow plow prep / Camper Pkg. If you are ordering a diesel 4wd, both of these packages will give you the same 6000 lb fgawr and same torsion bar increase. Neither of these will increase your payload. The only benefit you may see is less pitch when stopping or starting. Your unload ride would be worse. I personally don't think F60 or VYU is really necessary in that weight range for fifth wheel. #iworkforGM

Both Flint and Oshawa have changed over to 2024s. Flint has been shipping 2024s for a few weeks. Oshawa just started shipping 2024s late last week. #iworkforGM

The towing sticker can be off some due to the way SAE calculates vehicles with over 8600 lb GVW. The towing calculation for that MODEL is based on base vehicle mass. For vehicles under 8600 lbs, the towing calculation for that MODEL uses EPA mass which means you include every option with over 33% take rate into the vehicle mass. For GM's towing sticker, the payload and curb mass are VIN specific. The towing numbers are MODEL specific based on SAE calculation. For HD trucks, the conventional towing number is usually accurate because it's usually restricted by handling or due to 2.5 hitch and isn't restricted by mass calculations. The GN numbers can be off by a few thousand pounds due to them being mass constrained. The issue with the High County is it has a curb mass significantly higher than work truck mass and with the SAE the High County is GVW restricted while the work truck is GCW. This means the High County loses 6.67 pounds on gooseneck trailering per pound increase in curb mass. For HD segment, the SAE cal uses base vehicle mass (work truck mass) + 300lbs passengers + 100 lbs cargo + 120 lbs hitch equipment + 15% pin ( raise trailer weight until you hit gvw, gcw, or rgawr). So, if your passengers weigh more, you haul more cargo, you have heavy ass slider hitch, and/or have pin over 15% the sticker wouldn't be able to haul what is on the sticker if GM used the curb mass of the truck. The only weigh to be accurate is to use app. On the app, you can put the curb weight in, passenger weight, cargo weight, hitch weight and it will output the max trailer weight. As a rule of thumb, I generally tell people if you are hauling GN or fifth wheels when you get 70 to 75% you should consider moving up to next higher capable model. There is nothing new for this trailer label for 2024. The trucks from 2020 all have the similar issue. If you compare similarly equipped F250, Ram 2500, GM 2500 you will see similar drops in GN towing. #iworkforGM

The issue is due to the trailer information module (TIM) not sensing enough resistance to supply power to the lighting circuits. The most likely issue is a poor ground on the trailer. If the trailer wiring is a flat four way, it uses the trailer ball as the ground. You should have a white wire going to trailer frame. I would clean that mounting surface and add star washer. You need a good consistent ground from trailer frame to the truck frame. I would look to see how rusty your trailer ball or trailer coupler are. You could put steel wool on top of your ball and clamp your trailer over top. Driving with steel wool will help cleanup the surfaces and get a better ground. I don't love how the system works, but ultimately it's a ground issue causing your issue. #iworkforGM

If it's only at cold ambients and after sitting for a while, I would look at fan clutch. #iworkforGM

I will try to explain the trailer label better to help with confusion here. The only numbers on the trailer label that are VIN specific are payload, GVW, RGAWR, curb weight, and GCW. The rest of the trailering numbers are MODEL specific and may not represent what your truck can actually haul because your curb weight could be significantly higher. The hitches are rated to the following maximum numbers 20,000 lbs conventional, 32,000 lbs fifth wheel, and 36,000 lbs GN. So, if you don't exceed 2000 tongue load or 15% of FW or GN numbers you will be fine assuming you don't exceed GVW, RGAWR, and GCW. The trailering numbers are based SAE J2807 calculation. For trucks with GVW over 8600 lbs, the calculation uses base model mass + 300lbs passengers + 100lbs cargo + hitch weight (70GN, 120conv, 250FW lbs) + 10% conv or 15% GN/FW until you hit GVW, RGAWR, or GCW. This is the maximum weight you could potentially haul if the trailer combination meets all the performance targets like handling, acceleration, braking, etc. The maximum tongue/pin weight are just what the numbers need to meet SAE calculation not the max of the hitch itself. As far as WDH, GM for heavy duty tests both cases. For Sway, it's worst case to test without WDH. For understeer, it's worst case to test with WDH. If we past both tests, we say WDH not required. I personally would recommend a WDH if you have any issues with sway. Cranking up the bars, adds friction and reduces sway. #iworkforGM

Shackles has one of the biggest influence on lateral stiffness in rear suspension. These aftermarket shackles have lower rates than production so they ride great but the tradeoff is steering performance and handling when unloaded. The steering gets heavier and more vague on center.

It's a pretty nice system. It doesn't wait for rear wheels to slip for it to engage the front. The transfer of torque is based on driver and vehicle behavior to prevent clunky engagement. It tries to predict when slip would occur and transfer torque before it occurs. #iworkforGM

Torque change is diesel only. #iworkforGM

AAM #iworkforGM

10 speed is standard on everything.

You will see more information later in the week.