crowag2010

Hate to raise this thread from the dead, but my 2021 1500 AT4 is leaking through the bluetooth module. I have an apt with the dealership for warranty coverage, but damn, this is ridiculous for how much money we pay for these things. That and the seat headrest rattle in the backseat makes me want to turn this thing in for something else...

93 Octane 100% of the time

So...is it the harmonic balancer or the alternator pulley? Or both?

I feel like I'm going in circles looking for lighting options for this truck. The wife and I frequent the Texas Hill Country and lighting out there gets EXTREMELY important with how much wildlife gets onto the highways and backroads. Unfortunately, I can't seem to find specific lighting kits for this year's model, but I'm open to doing some modding if need be, but would like to see who else has done the same, and if you have any photos/tips/products used. TIA!

They've come up with a fix for it (see below). Can't say I would know because I'm looking to install LEDs on my '21 AT4 as well and I have no clue where to start since most websites say "This item will not fit your vehicle". Its so frustrating! LED Wind Diffuser

Just bought a '21 AT4 with the 6.2 in January. Have about 2200 miles on it now, and I'm having the same issue. My truck came from the dealer with an upgraded exhaust and a K&N intake. It sounds like birds chirping/belt squealing. I really notice it when I'm coasting/slowing down and the truck downshifts around the 15mph mark. I can replicate it 95% of the time I would say. Very disappointed to hear this has been an issue that hasn't been addressed by GM!