2008 Silverado LTZ 4x4 5.3L 4 door super short box. While driving and slowing down to a stop light, stabilatrack dings at me and message board says Stabilatrack off. Once awhile Service traction control comes up as well. The message dis-appears after a few seconds. It's happening more and more as of late. 8 out of 10 times immediately after this message comes on when accelerating from the stop it shifts extremely hard from first to second. Neck wrenching bang clunk shift.
That have I done so far.... Local dealership re-flashed the computer $220, I installed a new throttle position sensor. I haven't check the codes recently.
Any words of advice? Only has 120,000km on it

 

without codes its just a guessing game

 

Cleared these codes tonight
P0172 and p0175
Banks 1 and 2 systems too rich
This brought up the check engine light but how are they related to the stabilatrack system???

 

I’m sorry to hear about the codes that you recently encountered, oldveedub. Are you planning on heading into a certified Chevrolet dealership for an official diagnosis? I would be more than happy to contact them on your behalf if so. We’re available via private message and I’d only need your VIN, mileage, contact information, and preferred dealership. Keep us in the loop regarding this situation and have a great day!

Jasmine
Chevrolet Customer Care

 

Having the same problem with lights coming on and hard shifting. I have the 6 litre engine and replaced the throttle body 9 months ago. The lights are coming on when sitting, not moving and then they go away. Any ideas ?