2022 GMC SIERRA 2500 AT4 BRAKE SERVICE MODE

joeyjan · September 21

I am trying to replace the rear brakes on my 2500 AT4. I have watched every video and read the forums on holding the brake down and the parking brake button, once it flashes on the dash, let go and then press again and it will put the truck in service mode to do the rears.

I cannot get the truck in the service mode doing this. the light in the dash flashes after holding, once i let go and then press the button like everyone says, it just says parking brake released. but it is not in service mode. i bought a topscan scanner to attempt to do it through the app but once again, the option isnt even in there to put the truck in service mode. when i found a service brake mode, it said "not supported".

im at a loss. has anyone with a 2022 2500 AT4 experienced this? or have another method to get the truck in service mode to do the rear brakes?

Xray135 · September 21

I don't have any ideas on how to get into service mode, but I do have a question.

Why are you replacing brakes on a 2-3 year old?

joeyjan · September 22

6 hours ago, Xray135 said:

I don't have any ideas on how to get into service mode, but I do have a question.

Why are you replacing brakes on a 2-3 year old?

Had the good old factory brake squeal from the semi-metallic GM brakes. 22k miles. it was terrible. did the fronts and its about 70% better. There still is some squealing from the rears. figured id knock out the rears as well to eliminate that terrible noise.

StellaTBurse · September 23

On 9/22/2024 at 11:12 AM, joeyjan said:

Had the good old factory brake squeal from the semi-metallic GM brakes. 22k miles. it was terrible. did the fronts and its about 70% better. There still is some squealing from the rears. figured id knock out the rears as well to eliminate that terrible noise. geometry dash deadlocked

I think the 2022 GMC Sierra 2500 AT4 brake maintenance mode highlights the challenges users face when trying to use this feature, it brings up the need for clearer instructions and troubleshooting support.

Edited September 24 by StellaTBurse