TripDad

IS there an actual suplementary spring? If so, where does it mount?

GM changed the springs to properly balance the more rearward position of the 5th wheel/Goose Neck mounts.

Just retrieved my 2020 AT4 2500HD from the local GMC service center. My trailer will connect, but then disconnects and reconnects intermittently. I was told everything is working as designed, and my problem is the LED lights. I did try the Curt product mentioned above to no avail. This is my second camper that this happened on. This truck is my first and last GM product. I am working on a workaround. If I am successful I will post back. Aside from this issue, and this is a big issue for me, I like the truck.

Hill descent control work on steep low traction environments often found off pavement. It is useful but also cumbersome at times. IMO, this is like most other driver aids, a more skilled, attentive drive likely will not need them often.

I did pick up a proper tester. The trailer brake issue happened on two trailers (RVs), one of which I had no issues with my 2013 F150. The connection worked with the tester, but the tester has higher resistance the the campers. This is a GM issue by not properly engineering the trailering package. I orders the Curt adapter mentioned in an earlier post to see if this corrects the issue.

I am having the trail brake issue also. Going to the local dealer tomorrow to arrange service. I have a 2500 AT4.

No chains is for certain tire sizes

2500HD AT4 Duramax 11350lb GVWR- 3048 lb payload

Waiting on parts

No. May got to a local canvas shop and have them put one in.

My block heater cord and grill cover were under the back seat.

Apparently some of the early production models have faulty engine block heaters. When I picked up my 2500 I noticed the cord to plug into the wall was missing. I was told the heater had been disabled. Repair parts are slow in coming, strike problems. Not a big deal, just annoying.

Over all the tech, camera, safety packages are very good to have. Worth is up to the individual. The AT4 does not come with adaptive cruise so forward collision alert is less effective. The HUD is a little weird at first, but very handy. I do not care for sunroofs, but that is what many truck get ordered with. Blind spot alert is just another useful tool. The cameras are great for many reasons. The HD camera rearview mirror is great at night. The seat buzzer i find is less annoying the chimes and bells. I am installing the (overly pricey) rear trailer camera on my camper to be able to better protect my stuff from the crappy Colorado drivers. None of these things replace driving well, just more tools to keep these very expensive truck looking good.