Okay I've finally done it. lots of research and testing/trouble shooting. so here it is;
*list of parts you need:
GNTX-657 (the mirror I used, keeps it OEM with onstar)
2 inter connects gm part#175265-1 I got them from...
Just heads up.
This for a 2008 CTS.
I was getting engine code 128.
I figure it most likely the Thermostat.
Went down and picked one up for $19.00 no big deal.
After getting the car apart it has a bad Thermostat housing.
The part number on the housing not matching up to anything.
My car has been what I would call shutting around 1500 rpm/ 40mph but there is no check engine light and if you move on it seems to clear up. The ca has new plugs, coil packs and i only use premium fuel. Less than 50k miles. Anyone else seen this?
Have a 2008 CTS. Car was running great. Got OnStar report saying all is well. All of sudden I couldn't get the car to start. Lots of flashing lights when trying to start. But no go... Then when I got out doors all locked and I had to use the key to get in.
Clock still keeping time. Earliest...