This seems to be a popular subject. So just chiming in with my problem.
So far I have noticed that these lights come on when I am in slow traffic or stopping at many stop lights. First starts as a misfire, then "service ECM and traction control lights come on. If I gently accelerate, the misfire stops until I slow or stop again. Not a constant misfire, but like an intermittent hiccup. Whenever I get to turn it off and restart, the lights always turn off. This problem may not reoccur for days or weeks, but when it does, its always in stop and go traffic, and when the engine is warm. Has never happened above 20 MPH.
My therory is that the misfire starts everything. slight bucking of the car then sets off the ECM / TC sensors of some kind.
This seems to be such a problem. I'm leaning towards the "terminal fretting corrosion" as the culprit.
I dont trust my local dealer, in Westminster, Md. they have a bad rap and tried to rip me off on a previous car I took to them. Hope that GM will come up with a fix and service bullitin to solve this once and for all.
Just my 2 cents........
So far I have noticed that these lights come on when I am in slow traffic or stopping at many stop lights. First starts as a misfire, then "service ECM and traction control lights come on. If I gently accelerate, the misfire stops until I slow or stop again. Not a constant misfire, but like an intermittent hiccup. Whenever I get to turn it off and restart, the lights always turn off. This problem may not reoccur for days or weeks, but when it does, its always in stop and go traffic, and when the engine is warm. Has never happened above 20 MPH.
My therory is that the misfire starts everything. slight bucking of the car then sets off the ECM / TC sensors of some kind.
This seems to be such a problem. I'm leaning towards the "terminal fretting corrosion" as the culprit.
I dont trust my local dealer, in Westminster, Md. they have a bad rap and tried to rip me off on a previous car I took to them. Hope that GM will come up with a fix and service bullitin to solve this once and for all.
Just my 2 cents........