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2022 GMC SIERRA 2500 AT4 BRAKE SERVICE MODE

joeyjan
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joeyjan New Member

joeyjan

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Posted (edited)

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?

 

 

Edited by joeyjan
misspelling
newdude Senior Enthusiast

newdude

Posted
Posted (edited)
On 9/21/2024 at 2:50 PM, joeyjan said:

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?

 

 

 

 

That procedure is for the 1500s.  NOT the 2500/3500s.  

 

1500s have the parking brake integral to the rear caliper which requires entering service mode.

 

2500/3500s, the parking brake is electronically actuated but it still uses the shoes on the inside of the rotor like every truck before it 1999-2019 HD.  

Edited by newdude
joeyjan New Member

joeyjan

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Posted
On 9/23/2024 at 10:21 AM, newdude said:

 

 

That procedure is for the 1500s.  NOT the 2500/3500s.  

 

1500s have the parking brake integral to the rear caliper which requires entering service mode.

 

2500/3500s, the parking brake is electronically actuated but it still uses the shoes on the inside of the rotor like every truck before it 1999-2019 HD.  

So i can just proceed with the brakes as normal then and not worry about it? maybe disconnect the battery to be safe it doesnt actuate and replace them?

newdude Senior Enthusiast

newdude

Posted
Posted
22 hours ago, joeyjan said:

So i can just proceed with the brakes as normal then and not worry about it? maybe disconnect the battery to be safe it doesnt actuate and replace them?

 

 

Proceed as normal.  

  • 4 months later...
Mike 343 New Member

Mike 343

Posted
Posted

joeyjan:  How did your repair go?  I am planning on replacing my rear pads on a 3500 AT4.  Do I need to worry about putting it into service mode?  Thanks.  

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