MTU Alum

Even with the system completely off, driveline protection is still active so you will have some brake invention if side to side or front to rear wheels are not spinning together.

An one push of traction control switch disables engine traction control but brake traction and stabilitrak are still on, press and hold for 10 secs disables traction control and stabilitrak. Stabilitrak turns back on for speeds above 35 mph. This is the case for all 4wd modes except 4low. The cycling noise you here is the ABS module building and/or dumping pressures to the needed brake corner for stability or traction control. #iworkforGM

F60 - heavy duty front suspension raises the torsion bar and front GAWR to the next size up. On the majority of 4wd diesels, heavy front and snow plow prep (VYU) are the same front suspension with raising front GAWR from 5600 to 6000 lbs. On majority of 4wd gas, heavy front goes up one torsion bar whereas snow plow prep goes up two or three sizes. On gas trucks, you do get a different front shock with more force in it. Most 4wd gas with go from 4800 Front GAWR to 5200 with heavy front. The ride hit is relatively small on both gas and diesel trucks with heavy front. Most of the change is in your rolling isolation where the higher spring rate reads the road more. #iworkforGM

If the pull direction swapped you may need a new front tire to repair.

Technically only right front is out of spec. 45lbs at 60 psi, 50 lbs at 70 psi. Glad to see them replacing tires at lower specs to help fix these trucks.

The deadban on center sounds normal. You need some deadban to help make the steering be not to quick when loaded. The deadban decreases with load and could lead to trailer sway and vehicle stability issues with steering that is too quick.

I would be equally disappointed if I had to take my new truck to the dealer multiple times to fix the same issue. Dealers should be putting picoscope on these trucks to confirm the issue is tire related. These HD tires can be hard to balance due their high weight, large offsets, and large pilot opening. There is special equipment that is needed for hunter machines to ensure the tire asm is mounted to the machine before road force.

Road force balance will not determine a pull issue with a tire. Dealers are supposed to swap the tires from side to side to determine if there is a tire issue with belt angle. #iworkforGM

The VPM, video processing module, is located behind the passengers seat back(second row seat on double and crew). You have to remove the seat back to access it. #iworkforGM

There is two issues: one where the steering wheel shakes after hitting a bump and your more typical tire uniformity shake. The steering calibration fixes the first issue. Tire flat spotting, uniformity, balance are causes of second. These tires are difficult to balance and I'm not sure if they all have the correct equipment. A proper balance would include driving the truck for 15 minutes to remove flat spots and then road force balance. #iworkforGM

I calibrated these systems in the past. I would be really looking at longitudinal and lateral acceleration sensors. I believe these are contained in the air bag module (SDM). I would probably see if these signals could be zero'd or recalibrated. I would look at the mounting of the module and make sure it is sitting flush (seen issues before where welding flash on a stud made module not sit flush when torqued up). With you having a hill start issue (using long acceleration to determine grade) and issues with torque reduction in corner (looking at lateral acceleration sensor), I would start there. #iworkforGM

Are you correcting for your miles driven based on your odometer not being correct? You are driving more distance per rev than the vehicle thinks you are.

You have the 360 deg system (uvs). The other poster has the 270 deg (uvi) system. The 270 deg system has more limited functionality. No transparent view, no turn signal bias, no turn bias, and no Camara views for longer than 8 sec above 10 mph. #iworkforGM

There are two systems that accept trailer cams. Do you have cams in mirrors and front grill?

Which system are you referring to? 270 or 360 deg?

I believe with the uvi system you can only get 8 secs of viewing behind the trailer when above 10 mph. If you stay below 10 mph the trailer cam will stay up.

There are two systems that you can plug trailer cams into: 270 deg (UVI) and 360 deg (UVS). Only the 360 deg (UVS) has the ability to do transparent trailer. #iworkforGM

I'm glad it worked. I wished it did not work that way. #iworkforGM

It will correct itself. No hardware issues just one of those software oddities.

You typically will get a black screen with trailer camera views.

I usually backup to trailer and get aligned to trailer hookup, shut truck off, hook up trailer and chains, then plug in electrical, and finally camera. These cameras don't like a hot hookup where the truck is running or communications bus is alive.

Do you have the seven way trailer plugged in when checking the trailer cams? I know you will not get power without 7 way plugged in. Also, I recommend having the truck completely asleep before plugging trailer cams. The truck is usually asleep after the green OnStar light goes out. #iworkforGM

Do you get the steering shake after hitting a bump or does it constantly happen over a speed range? #iworkforGM

You usually have to have a trailer seven way attached to truck for the camera to work. In addition, the trailer cameras do not like a "hot" plug in. This means the truck needs to be off and gone to sleep before plugging in. 2020 has two different trailer camera systems: 270 deg (UVI) and 360 deg (UVS). You may not get the same results between 2019 and 2020.

In order to calibrate, you need to drive in straight line from 10 to 30 mph. If you have a v nosed trailer you probably need to adjust your center of ball to front of trailer measurement. The measurement should be from center of ball to if the trailer had a flat front. So measurement should be center of ball to where the v starts on the trailer. The transparent image works by stitching four camera views together: tailgate, outside mirrors, and trailer cam. #iworkforGM