Service ESC, Reduced Steering Assist, Service Parking Brake, and Service 4WD

[GMCSierra99]

This is the second time these waring messages have come on now. Both times it has been wet roads. When you shut the truck off the E-brake will engage and when you try to restart it nothing happens, all lights just turn off when you try to push the start button. I had to disconnect the negative battery post for a few minutes and the error messages clear and it starts and runs like normal. Any body had this happen and what was the fix. I will be calling the dealer today to talk about this. I do have a Pulsar LT installed that I will be removing before I take it in. Not sure if that is the issue or not. I do remember having the service parking brake message come on before I installed the Pulsar. 2019 6.2 AT4 46,000 miles. No misfires and runs smooth while the lights are on. Thanks for any help. 

[20201500At4]

I had all of these come one yesterday then i drove it back home and the truck was rough idling, had it towed. Dealer called me this morning said it had a misfire and they would call me back

[GMCSierra99]

On 4/7/2022 at 12:05 PM, 20201500At4 said:

I had all of these come one yesterday then i drove it back home and the truck was rough idling, had it towed. Dealer called me this morning said it had a misfire and they would call me back

Yours sounds like a lifter issue. That is my guess. Mine is running perfect outside of the errors I already stated. Good luck.

Edited April 11, 2022 by GMCSierra99

[GMCSierra99]

Dealer called and said I have a leaking back window that is leaking onto the control module or whatever is behind the backseat. I hope this fixes the issue. They are going to replace the module and fix the leaking window. They should have it done in a couple days when the part comes in. I will update when I get it back. 

[Wardy1890]

On 4/7/2022 at 1:05 PM, 20201500At4 said:

I had all of these come one yesterday then i drove it back home and the truck was rough idling, had it towed. Dealer called me this morning said it had a misfire and they would call me back

Any update on this I was driving my truck last night the esc,service parking brake,traction,  and check engine light all came on and had very rough idle codes came up as multiple misfire I don’t have appt til Friday at my dealer thanks 

[Diamond817]

On 4/16/2022 at 2:58 PM, Wardy1890 said:

Any update on this I was driving my truck last night the esc,service parking brake,traction,  and check engine light all came on and had very rough idle codes came up as multiple misfire I don’t have appt til Friday at my dealer thanks 

Just happened on my truck, same exact codes/symptoms. Waiting for the tow truck right now. 

 

2021 RST 4x4 w/26,000mls.

 

 

Edit: Dealer just called, lifter failure. 

 

 

 

 

 

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Edited April 19, 2022 by Diamond817

[Jethro71]

I know this is an old thread, but I am only seeing it now for the first time.  This happens to me about 1 or 2 times a month.  Sometimes it's when I start the truck, sometimes I get all those messages while I am driving.  I don't get a rough idle though.  I have to stop, disconnect, then reconnect the negative battery cable.  After that, it resets itself and everything is fine- until it happens again.  I too have the Pulsar LT installed.  I really don't want to get rid of it because I really like disengaging the DFM.  Any other word of what's going on?

[dawg99]

22 hours ago, Jethro71 said:

I know this is an old thread, but I am only seeing it now for the first time.  This happens to me about 1 or 2 times a month.  Sometimes it's when I start the truck, sometimes I get all those messages while I am driving.  I don't get a rough idle though.  I have to stop, disconnect, then reconnect the negative battery cable.  After that, it resets itself and everything is fine- until it happens again.  I too have the Pulsar LT installed.  I really don't want to get rid of it because I really like disengaging the DFM.  Any other word of what's going on?

Mine did this also, I had the Pulsar LT installed also, removed the Pulsar LT and have not had the issue again. It's been removed for about 2 months now with no more service warnings.

[Jethro71]

 

On 6/30/2022 at 7:31 PM, dawg99 said:

Mine did this also, I had the Pulsar LT installed also, removed the Pulsar LT and have not had the issue again. It's been removed for about 2 months now with no more service warnings.

I was afraid the Pulsar LT might be the problem.  I think I'm going to email them and see if they have an update for the Pulsar LT that might fix this issue.  If they don't, I guess I'll just keep must socket set with me and disconnect the battery to reset the computer when it happens because I really don't want to get rid of disabling the DFM.  Now that these trucks and DFM have been out for a few years, are there any other devices or ways to reprogram/ re-tune the computer to get rid of DFM that wasn't available prior to the Pulsar LT?