JonathanGMC

I just got a GMC Sierra AT4 (2020), and was considering installing the upfitter switches. However, they're hard to find in stock. I was wondering if anyone has re-purposed any of these switches, like the auto start/stop button or the lane keep assist. I'd be happy to exchange these both being permanently OFF for a nice looking switch for an air compressor and firetruck horn ?. Has anyone done anything similar? If not, how are you all powering/controlling accessories in your trucks? [Not my photo, found it on Google, but points to the row of switches I am thinking of]

I have a 2020 GMC Sierra AT4 w/ CarbonPro. First truck, first time installing a Tonneau Cover. I purchased this WeatherTech one and it is excellent. https://www.weathertech.com/gmc/2020/sierra-1500/roll-up-truck-bed-cover/sierra-box-size-4th/short-box-69/bedside-storage-box-4/no/gm-carbonpro-bed/yes/ Install was easy (had to watch their video a couple times) and you only drill into some crappy plastic cover, not the actual beautiful carbon fiber. Was skeptical about watertightness but it has survived 3 months of Florida downpours without a darn drop inside!!

Hello, new poster here, I found this thread and have a similar thing with my 2020 Sierra AT4. Under hard braking as I get to 15 mph to zero, I have a really painful grinding sound. It's a deep grinding sound, not like metal-on-metal train car sounds. What is very odd is that (I think) it doesn't happen with Auto Stop/Start disabled... which makes no sense to me (I thought it was the brakes making the sound), but so far in my testing it seems to be the case. It's difficult to reproduce the problem though.