Technical Service Bulletins (TSBs) for the 1999 Envoy 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.

    STEERING:HYDRAULIC POWER ASSIST:PUMP

    • TSB #SB-06-02-32-013B

      Date Announced:
      AUG 01, 2009
      NHTSA ID:
      #10032462

      SAAB/HUMMER/GM: DIAGNOSTIC TIPS/RECOMMENDATIONS WHEN POWER STEERING PUMP REPLACEMENT IS NECESSARY. ANALYSIS OF RETURNED POWER STEERING (PS) PUMPS THAT HAD BEEN REPLACED FOR NOISE, NO POWER ASSIST, NO OR LOW PRESSURE AND LEAKING ... Read More »

    SUSPENSION:FRONT

    • TSB #02015

      Date Announced:
      JAN 01, 2004
      NHTSA ID:
      #10006961

      POP SNAP NOISE IN THE FRONT SUSPENSION WHEN BRAKING. *MR Read More »

    SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DRUM

    • TSB #270901

      Date Announced:
      SEP 27, 2001
      NHTSA ID:
      #626507

      SUBJECT REGARDING NECESSARY RESURFACING OF THE PARK BRAKE DRUM. *JG Read More »

    SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP

    SERVICE BRAKES, AIR:ANTILOCK

    • TSB #020525006A

      Date Announced:
      DEC 01, 2002
      NHTSA ID:
      #10000749

      ANTILOCK BRAKE (ABS) ACTIVATION AT LOW SPEEDS ON VARIOUS MODELS INCLUDING THE 1995 AND 1996 ENVOY. *TT Read More »

    ENGINE AND ENGINE COOLING

    • TSB #040603002

      Date Announced:
      FEB 01, 2004
      NHTSA ID:
      #10012703

      DIAGNOSTIC INFORMATION FOR INTERMITTENT VEHICLE NO CRANK DEAD BATTERY. *EH Read More »

    • TSB #990602012D

      Date Announced:
      APR 01, 2002
      NHTSA ID:
      #634218

      SUBJECT REGARDING RUST IN COOLING SYSTEM, HEATER INOPERATIVE, BLOWS COLD AIR, ENGINE OVERHEATS (FLUSH COOLING SYSTEM). NLM Read More »

    ENGINE AND ENGINE COOLING:EXHAUST SYSTEM

    • TSB #020605002

      Date Announced:
      MAY 01, 2002
      NHTSA ID:
      #634729

      SOME CUSTOMERS MAY COMMENT ON AN EXHAUST BOOM / GROAN NOISE IN THE PASSENGER COMPARTMENT. *TT Read More »

    • TSB #311001

      Date Announced:
      OCT 31, 2001
      NHTSA ID:
      #628070

      SOME VEHICLES MAY EXHIBIT AN EXHAUST NOISE, RATTLE NOISE AT 550 RPM. *TT Read More »

    FUEL SYSTEM, OTHER:STORAGE:FUEL GAUGE SYSTEM

    • TSB #PIT-3046E

      Date Announced:
      AUG 01, 2008
      NHTSA ID:
      #10026704

      GMC: FUEL GAUGE FLUCTUATION IN PARK OR NEUTRAL, CAUSING THE LOW FUEL LIGHT TO ILLUMINATE. *PE Read More »

    • TSB #3046A

      Date Announced:
      NONE PROVIDED
      NHTSA ID:
      #10009382

      FUEL GAUGE FLUCTUATION IN PARK OR NEUTRAL. *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

    • TSB #030730056

      Date Announced:
      NOV 01, 2003
      NHTSA ID:
      #10005566

      4L60-E AUTOMATIC TRANSMISSION OIL PUMP FIRST AND SECOND DESIGN IDENTIFICATION. *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 »

    POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE)

    • TSB #01409

      Date Announced:
      NOV 18, 2003
      NHTSA ID:
      #10004212

      THE NVG 136 ALL WHEEL DRIVE (AWD) TRANSFER CASE AND THE 236 AND 246 NVG SELECTABLE TRANSFER CASE SHUDDER ON TURNS. *TT Read More »

    • TSB #990421003

      Date Announced:
      JUN 01, 1999
      NHTSA ID:
      #606091

      SOME OWNERS MAY COMMENT ABOUT A SLIPPING TYPE CONDITION AT THE FRONT WHEELS WHILE THE VEHICLE IS IN FOUR WHEEL DRIVE (4WD). *TT Read More »

    • TSB #3012B

      Date Announced:
      NONE PROVIDED
      NHTSA ID:
      #10008806

      THE NVG 136 ALL WHEEL DRIVE (AWD) TRANSFER CASE AND THE 236 AND 246 NVG SELECTABLE TRANSFER CASES OPERATING IN THE AUTO MODE MAY EXHIBIT A CONDITION OF A VIBRATION/SHUDDER DURING LOW SPEED TURNS SUCH AS A PARKING LOT MANEUVER, UP TO ... Read More »

    • TSB #3349

      Date Announced:
      NONE PROVIDED
      NHTSA ID:
      #10014809

      4WD INOPERATIVE AND DIAGNOSTIC TROUBLE CODE (DTC) U1026 ATC FUSE OPEN. *TT Read More »

    • TSB #3424

      Date Announced:
      NONE PROVIDED
      NHTSA ID:
      #10017299

      ELECTRONIC TRANSFER CASE UNABLE TO COMPLETE SHIFT. *TT Read More »

    POWER TRAIN:DRIVELINE

    • TSB #3300

      Date Announced:
      NONE PROVIDED
      NHTSA ID:
      #10013572

      4WD MODELS WITH NOISE, VIBRATION ON DRY PAVEMENT. *EH Read More »

    POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT

    • TSB #990421003C

      Date Announced:
      AUG 01, 2003
      NHTSA ID:
      #10004401

      FRONT WHEELS SLIPPING WITH VEHICLE IN FOUR WHEEL DRIVE. *TT Read More »

    • TSB #990421003B

      Date Announced:
      APR 01, 2001
      NHTSA ID:
      #619378

      SOME OWNERS MAY COMMENT ON A SLIPPING TYPE CONDITION AT THE FRONT WHEELS WHILE THE VEHICLE IS IN FOUR WHEEL DRIVE (4WD). *TT Read More »

    ELECTRICAL SYSTEM

    • TSB #02038

      Date Announced:
      JAN 01, 2004
      NHTSA ID:
      #10006946

      DIAGNOSTIC TROUBLE CODE B1000. *MR Read More »

    • TSB #01642

      Date Announced:
      JAN 01, 2004
      NHTSA ID:
      #10007235

      IPC (INSTRUMENT PANEL CLUSTER) GAUGE FLUCTUATION AFTER KEY-OFF. *TT Read More »

    • TSB #02010

      Date Announced:
      JAN 01, 2004
      NHTSA ID:
      #10007296

      IPC (INSTRUMENT PANEL CLUSTER) INTERIOR HEAD LAMPS FLICKER ON 99-04 CHEVROLET, GMC AND CADILLAC FULL SIZE TRUCKS AND UTILITIES AS WELL AS OTHER MODELS. *TT Read More »

    • TSB #3170B

      Date Announced:
      NONE PROVIDED
      NHTSA ID:
      #10017165

      INSTRUMENT PANEL CLUSTER INTERIOR AND/OR HEAD LAMPS FLICKER. *TT Read More »

    EXTERIOR LIGHTING

    • TSB #00502B

      Date Announced:
      JAN 01, 2004
      NHTSA ID:
      #10007905

      DAYTIME RUNNING LAMPS (DRLS) TURN OFF TEMPORARILY WHILE THE TURN SIGNALS ARE ACTIVATED. *TT Read More »

    EXTERIOR LIGHTING:HEADLIGHTS

    • TSB #050842003

      Date Announced:
      MAR 01, 2005
      NHTSA ID:
      #10015013

      HIGH INTENSITY DISCHARGE (HID) HEADLAMPS - DISPOSAL INSTRUCTIONS. *TTT Read More »

    • TSB #3170C

      Date Announced:
      NONE PROVIDED
      NHTSA ID:
      #10010168

      INSTRUMENT PANEL CLUSTER (IPC) INTERIOR AND/OR HEAD LAMPS FLICKER. *TC Read More »

    • TSB #3170E

      Date Announced:
      NONE PROVIDED
      NHTSA ID:
      #10019186

      IPC, INTERIOR LIGHTS AND/OR HEADLAMPS FLICKER. *AK FB2 Read More »

    VISIBILITY:POWER WINDOW DEVICES AND CONTROLS

    • TSB #151200

      Date Announced:
      DEC 15, 2000
      NHTSA ID:
      #617784

      CUSTOMER MAY COMMENT THAT THE REARVIEW MIRRORS, POWER DOOR LOCKS AND REAR HATCH DO NOT OPERATE. *TT Read More »

    VISIBILITY:REARVIEW MIRRORS/DEVICES:EXTERIOR

    • TSB #250101

      Date Announced:
      JAN 25, 2001
      NHTSA ID:
      #618204

      BRIEF INFORMATION CONCERNING THE OUTSIDE REARVIEW MIRRORS FOLDING RANDOMLY. *TT Read More »

    STRUCTURE

    • TSB #300800

      Date Announced:
      AUG 30, 2000
      NHTSA ID:
      #619027

      SUBJECT REGARDING THE NEW RECLINCER ASSEMBLY. *TT Read More »

    STRUCTURE:FRAME AND MEMBERS:UNDERBODY SHIELDS

    STRUCTURE:BODY

    • TSB #57

      Date Announced:
      JUL 01, 2003
      NHTSA ID:
      #10016473

      WATER LEAK IN FRONT FLOOR CARPET AREA. GM TECH LINK. *TT Read More »

    • TSB #4114

      Date Announced:
      NONE PROVIDED
      NHTSA ID:
      #10020462

      CLUNK NOISE FELT THROUGH THE FLOOR PAN. *KB Read More »

    STRUCTURE:BODY:DOOR

    • TSB #00100

      Date Announced:
      APR 30, 2001
      NHTSA ID:
      #619401

      ON CERTAIN VEHICLES, THE CONSOLE COVER / ARMREST CAM LATCH COULD RELEASE AT LESS THAN THE 10 G VERTICAL LOAD REQUIREMENT OF THE STANDARD. *TT Read More »

    INTERIOR LIGHTING

    • TSB #2010

      Date Announced:
      JAN 01, 2004
      NHTSA ID:
      #10009641

      INSTRUMENT PANEL CLUSTER (IPC) INTERIOR HEAD LAMPS FLICKER. *TT Read More »

    • TSB #3170E

      Date Announced:
      NONE PROVIDED
      NHTSA ID:
      #10019186

      IPC, INTERIOR LIGHTS AND/OR HEADLAMPS FLICKER. *AK FB2 Read More »

    EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.

    • TSB #16NA260

      Date Announced:
      AUG 26, 2016
      NHTSA ID:
      #10082506

      THIS TECHNICAL BULLETIN PROVIDES A PROCEDURE TO REPROGRAM THE MEDIA DISC PLAYER WITH THE LATEST CALIBRATIONS TO CORRECT A CONDITION OF THE REAR ENTERTAINMENT SYSTEM NOT OPERATING AS INTENDED IN COLDER AMBIENT TEMPERATURE AREAS DUE TO ... Read More »

    • TSB #990844002

      Date Announced:
      APR 01, 1999
      NHTSA ID:
      #605958

      SOME CUSTOMERS MAY COMMENT THAT THE CD CHANGER WILL NOT RELEASE WHEN DEPRESSING THE EJECT BUTTON. *TT Read More »

    EQUIPMENT:APPLIANCE:AIR CONDITIONER

    • TSB #3176A

      Date Announced:
      JAN 01, 2004
      NHTSA ID:
      #10010270

      HEAT COMING FROM VENTS WITH HVAC OFF. *TT Read More »

    UNKNOWN OR OTHER

    • TSB #060601

      Date Announced:
      JUN 06, 2001
      NHTSA ID:
      #623792

      INFORMATION REGARDING IMPROVED BUS SEAT DECLINER ASSEMBLIES, THE HANDLE ON THE RECLINER ASSEMBLY IS ATTACHED WITH A NUMBER 20 TORQUE WITH A SHANK LENGTH OF 20 MILLIMETERS. *SLC Read More »