Technical Service Bulletins (TSBs) for the 1994 Sierra are official communications between GMC & 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.

    SUSPENSION:REAR

    • TSB #01570

      Date Announced:
      JAN 01, 2004
      NHTSA ID:
      #10005412

      SPRING SLAP NOISE FROM THE REAR OF THE GMT 400 SERIES TRUCK. *MN Read More »

    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 »

    FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM

    • TSB #04-06-04-051F

      Date Announced:
      MAR 22, 2022
      NHTSA ID:
      #10209734

      This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive. Read More »

    FUEL SYSTEM, OTHER

    • TSB #3325

      Date Announced:
      NONE PROVIDED
      NHTSA ID:
      #10017191

      SUPPLEMENT TO BULLETIN 99-06-04-047A FOR FUEL SYSTEM CLEANING. *TT Read More »

    POWER TRAIN

    • TSB #990730016A

      Date Announced:
      OCT 01, 2002
      NHTSA ID:
      #10007838

      DIAGNOSTIC INFORMATION FOR INTERMITTENT TRANSMISSION DOWNSHIFT, SLIP, BUSY/CYCLING TCC OR NOISY COOLING FAN. *TT Read More »

    POWER TRAIN:AUTOMATIC TRANSMISSION:LEVER AND LINKAGE:COLUMN SHIFT

    • TSB #020730024A

      Date Announced:
      AUG 01, 2005
      NHTSA ID:
      #634999

      DIAGNOSIS OF CRACKED OR BROKEN TRANSMISSION CASE. *TT 2006 AND PRIOR CARS AND LIGHT DUTY TRUCKS. *TT Read More »

    VISIBILITY:WINDSHIELD WIPER/WASHER

    • TSB #02054

      Date Announced:
      FEB 21, 2003
      NHTSA ID:
      #10002567

      WINDSHIELD WIPER FAILURE DUE TO CRACKED BOULDER JOINTS ON THE CONTROLLER CIRCUIT BOARD. THIS SPECIAL POLICY COVERS THE CONDITION FOR A PERIOD OF SEVEN YEARS OR 70,000 MILES, WHICHEVER OCCURS FIRST FROM THE DATE THE VEHICLE WAS ORIGINALLY ... Read More »

    VISIBILITY:WINDSHIELD WIPER/WASHER:MOTOR

    • TSB #02054

      Date Announced:
      FEB 01, 2003
      NHTSA ID:
      #10001125

      SPECIAL POLICY ADJUSTMENT - WINDSHIELD WIPER MOTOR FAILURES. *TT Read More »

    • TSB #98043

      Date Announced:
      SEP 01, 1998
      NHTSA ID:
      #615106

      PRODUCT RECALL CAMPAIGN INVOLVING WINDSHIELD WIPER MOTOR REPLACEMENT. *TT Read More »

    EQUIPMENT:MECHANICAL

    • TSB #04-06-04-051F

      Date Announced:
      MAR 22, 2022
      NHTSA ID:
      #10209734

      This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive. Read More »