Technical Service Bulletins (TSBs) for the 1991 DeVille are official communications between Cadillac & their dealerships that describe processes for troubleshooting or fixing certain common problems. All vehicle manufacturers are required by U.S. law to make their TSBs available to the public.

    ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)

    • TSB #130089009

      Date Announced:
      SEP 01, 2013
      NHTSA ID:
      #10246631

      Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules Read More »

    POWER TRAIN:AUTOMATIC TRANSMISSION

    • TSB #577106A

      Date Announced:
      DEC 01, 1996
      NHTSA ID:
      #50571

      COLD START RATTLE NOISE. *TW Read More »

    • TSB #577106

      Date Announced:
      FEB 01, 1995
      NHTSA ID:
      #39308

      COLD START RATTLE NOISE. *TW Read More »

    POWER TRAIN:DRIVELINE:DRIVESHAFT

    • TSB #577106A

      Date Announced:
      FEB 01, 1997
      NHTSA ID:
      #51497

      COLD START RATTLE NOISE (DIAGNOSIS/SERVICE PROCEDURE). *TW Read More »