Problem Description and Possible Solution
The powertrain control module (PCM) can fail causing stalling, and various engine and transmission drivability concerns.
Average mileage: 120,763 (15,000–255,000)
16 people reported this problem
My 94 Cadillac Deville has been sitting in the shop. Got a call that the pcm was bad. It wouldn't stay running, crazy sounds, just etc. So I got that replaced and ran perfect. Now I'm haven transmission problems. I "suppose" it shifts hard going into second gear and from there it drives perfect. Could it be the Pcm and that they didn't program it right cause I never had this problem until I had one exchanged
It stalled on me one day, then next it worked fine. Took the aircleaner box and filter out, tapped on the pcm and it sarted to shoot all kinds of error messages to my dash. Still trying to fix it.