1991 Cadillac DeVille Service and Repair Manual
This 1991 Cadillac DeVille factory service and repair manual is built around the 4.9L V8 (VIN B) and the exact trim and body style it came in, so the specifications and procedures inside are the ones GM published for your car, not a substitute pulled from a different DeVille year.
Engines covered
- 4.9L V8 (300 cu in) — OHV, naturally aspirated, gasoline
Body styles covered
- 4-door sedan
- 2-door coupe
Trims covered
- Base
- Spring Edition
- Touring
Known issues on the 1991 DeVille. One recall is on federal record for this model year, covering the upper transaxle oil cooler hose: it can pull out of its crimped coupling at the transaxle end of the line assembly, and a resulting oil leak exposed to an ignition source could cause an engine compartment fire. Owners have filed 100 complaints for the year, and no technical service bulletins are logged. The factory diagnostic and repair procedures behind that system are here.
From a transaxle cooler line inspection to routine V8 service, it keeps you on the OEM procedure and the correct specification for your specific 1991 DeVille.
THE UPPER TRANSAXLE OIL COOLER HOSE CAN PULL OUT OF THE CRIMPED COUPLING AT THE TRANSAXLE END OF THE LINE ASSEMBLY.
IN THE EVENT OF SEPARATION OF THE COUPLING, AN OIL LEAK CAN OCCUR WHICH, WHEN EXPOSED TO AN IGNITION
DEALERS WILL INSTALL A NEW UPPER TRANSAXLE OIL COOLER LINE TO THE TRANSAXLE.
Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules
COLD START RATTLE NOISE (DIAGNOSIS/SERVICE PROCEDURE). *TW
COLD START RATTLE NOISE. *TW
COLD START RATTLE NOISE. *TW
DRIVING AT APPROXIMATELY 45MPH CONSUMER REARENDED ANOTHER VEHICLE, DRIVER'S SIDE AIRBAG DID NOT DEPLOY WHICH COULD HAVE CAUSED INJURIES. DEALER CLAIMED THAT THE BUMPER WENT UNDERNEATH VEHICLE THAT WA
CAR WAS AT COMPLETE STOP: ACCELERATOR PEDAL GOES TO FLOOR AND TAKES OFF ON ITS OWN.
NO DEPLOYMENT OF AIR BAG IN ACCIDENT, RESULTING IN INJURY.
VEHICLE WAS INVOLVED IN A COLLISON WHEN ANOTHER VEHICLE BACKED INTO VEHICLE. AIRBAG DID NOT DEPLOY. *AK *SLC
WHEN THE BRAKES WERE APPLIED THE PEDAL WENT TO THE FLOOR , RESULTING IN EXTENDED STOPPING DISTANCE, CAUSING THE VEHICLE TO COLLIDE. THE DEALER AND THE MANUFACTURER HAD BEEN NOTIFIED. *AK
Showing the 5 most serious of 105 complaints filed with NHTSA.
