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Stabilitrak / Traction Control / Service Brakes DIC warnings Solution

dwhitton

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dwhitton Enthusiast

dwhitton

Posted
Posted

2009 GMC Sierra 2WD, Z71 5.3L AFM 6 spd Trans.

 

Had Stabilitrak Disabled warning with chime and Engine Light start happening every 4 trips or so back in August.

 

It started to add Traction Control Disabled along with it about a month later. (both stating to service the systems)

 

It then started to add "Service Brakes" about 3 months after that, (just after I did new braks all around)

 

OnStar said error was "Steering Position Sensor" when I called them. I picked up a new sensor and had it installed. Light came on with road test at dealer.

 

Returned truck for a diagnosis session, where they found a Service Bulletin for the Steering Position Sensor requiring a "shim" and some dielectric grease on the connections. Road test was OK but 20 min after I drove it away they all came on again.

 

There was nothing specific that would cause the warning to come on (heat/cold/vibration/speed/wet/dry/ moving/stopped) Nothing.

 

Went to dealer today to try more diagnosis. They may have found the problem (ill let you know if the light stays off but it has so far) The Brake System Computer is located, get this, under the truck, drivers side, attached to the inside of the frame member. This computer has a 38 pin connector that plugs into it coming from the fuse box and behind the firewall. This is connected with a standard plastic connector and not protected from the elements at all. The connector's ($89 here in Canada) lock latch looks like it was hit by a flying rock or something, causing the connector to loosen, thereby causing the intermittent connection to the computer, hence the warnings.

 

They "tie-wrapped" the connector to the computer and the lights have not come on yet after 1.5 hrs of wet bumpy driving.

 

Not impressed by this set up, maybe looking to try and protect the connection from further damage some way.

 

Just wondering if anyone else has had issues with their Stabilitrac/Traction Control dropping off line mid trip. Maybe you should have a look underneath your truck. (took GM 4.5 hrs to find the problem)

  • 2 months later...
unioncoug Enthusiast

unioncoug

Posted
Posted

i've been having this same problem with my 2007 GMC YUKON the service stabilitraks comes on then shortly after the traction control turns off and every once in awhile the engine light comes on. Then its good for awhile it seems to start with slowing down and hitting bumps at the same time othere times it comes on when just crusing down the Highway. been buggin me for over a year. I pulled the code it said it was the o2 sensor too rich on bank 2 I replaced it and it seemed to fix it but lately I have noticed it coming on more. I will check that connection and see hopefully it fixes it.

  • 2 weeks later...
PH-Wolf Enthusiast

PH-Wolf

Posted
Posted

I had this issue a week ago with my 2011 Chevrolet Silverado 1500, I have the 4.3L V6 with 0ver 52,000 miles. I had the "Service Stabilitrak", "Service Traction Control", "Engine Power Is Reduced" messages, also had both SES and Low traction warning lights on. Top speed of 40 mph, ran rough at idle and trans shifted really hard. Limped it to the Chevy dealer and the paperwork Stated two codes P2153 and P0121. They Found that my Throttle Postion Sensor had failed. They replaced the sensor with a new Updated sensor Gm has, reprogrammed the ECU and reset the Idle. I put about 500 miles on my truck since the repair and so far no issues.

PH-Wolf Enthusiast

PH-Wolf

Posted
Posted

PH-Wolf,

 

Glad to hear that you concern seems to have been resolved. Let me know if you need anything in the future.

 

Tricia, GM Customer Service.

Thanks I will. It happened on my way From S.E Wisconsin to Springfield, IL and Friendly Chevrolet in Sprinfield, IL took care of me. I couldn't of asked for better service, they fixed it while I waited and I was back on the road in less then two hours. I was about 5 hours from home and poped in unexpected and they jumped on it right away.

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