TomatoSoup- It's funny you brought that up, I actually am questioning if the FCM I purchased could be the culprit. The website "Gates" says it is compatible, but I do know the light came on after I installed that FCM (as did my cooling fans as well- no issues on that front). Everything else works though, the fan is spinning, my car is at 199º. P0691 will not go away. Does anyone know what the original brand FCM in the vehicle is? Possibly ACdelco?
The Gates FCM:
Tonight I will plug in my old FCM and see if the service engine soon light goes off (even though my fans wont run). This will tell me if it's a gates issue.
The Gates website confirms the correct part number FCM106:
I'm not sure where to get an OEM FCM. there does not seem to be any indication of brand type on the existing.
Thank you for reaching out in trying to solve this matter.
Last edited by jworks; 06-17-2019 at 08:44 AM.