Rockdawg

I have a 2021 GMC SIERRA 1500 crew cab 4x4 SLT With the factory AT4 LIFT installed by the dealership. Want to know that if I can change out the rear spring blocks from a 2 inch to a 1.25 inch block to make the truck sit level.

Well, finally got the shop foreman to hear the noise. He said it was a shift solenoid in the transmission and that it was normal. He also told me that he had replaced several of them and a lot of times, the new one was louder than the old one. I asked a reputable Transmission mechanic about it and he said that you should not hear a shift solenoid as they are inside the transmission case and submerged in transmission fluid. Can't get a good answer from the dealership. Going back on 09/03 for oil change and tire rotation. Gonna see what I am told by a third person. Will update again later

Shop foreman. Going back next week hopefully. Going to ride the shop foreman around until he hears the click noise. Going to get to the problem some how.

Took it to dealership this week. They cleaned and greased the rear leaf springs and replaced the right front upper control arm. Only 28,000 miles, hmmmmm. Took the sop foreman on a ride to let him hear the clicking noise. We had heavy traffic and he said that he couldn't hear it. Picked up truck today. STILL HAVE CLICK NOISE.

Taking to the dealership hopefully next week. Any suggestions to what the problem might be???

My 2021 Sierra has started doing this also. Everytime when coming to a stop and then again when I start off.