Technical Service Bulletins (TSB)

BUICK — CORVETTE, CT4, CT5, ENVISION, ESCALADE ESV, SUBURBAN, TAHOE, YUKON XL (2020–2022) — 18 vehicle combinations

117100 ELECTRICAL SYSTEM:INSTRUMENT PANEL:SPEEDOMETER/ODOMETER

This Preliminary information communicates an issues with the odometer being incorrect after a programming event and how the dealership can resolve the issue.

BUICK — ACADIA, BLAZER, ENCLAVE, TRAVERSE, XT5, XT6 (2019–2022) — 21 vehicle combinations

100000 POWER TRAIN

This Preliminary information communicates to perform a transmission fluid drain and fill to correct a TCC shudder concern.

BUICK — ACADIA, BLAZER, ENCLAVE, TRAVERSE, XT5, XT6 (2019–2022) — 20 vehicle combinations

100000 POWER TRAIN

This Preliminary information communicates to perform a transmission fluid drain and fill to correct a TCC shudder concern.

BUICK — ENCORE GX, MALIBU, TRAILBLAZER (2019–2021) — 7 vehicle combinations

100000 POWER TRAIN

This Preliminary information communicates inspection and/or needed repairs for DTC P2714 on a VT40 CVT transmission

BUICK — ACADIA, BLAZER, ENCLAVE, SIERRA 1500, SIERRA 2500, SIERRA 3500, SILVERADO 1500, SILVERADO 2500, SILVERADO 3500, TRAVERSE, XT5, XT6 (2017–2022) — 102 vehicle combinations

050000 PARKING BRAKE

This Preliminary information communicates information to diagnose DTC C056D or C056E.

BUICK — ACADIA, BLAZER, BOLT EV, CT6, ENCLAVE, ENCORE GX, EQUINOX, LACROSSE, SIERRA 1500, SILVERADO 1500, TERRAIN, TRAVERSE, XT4, XT5, XT6 (2019–2021) — 74 vehicle combinations

110000 ELECTRICAL SYSTEM

This Preliminary information communicates a condition where the Video Processing Control Module is not able to be programmed to the vehicle. This PI offeres a couple workarounds while Engineering evaluates the concern.

BUICK — ACADIA, ALERO, ALLURE, ASTRO, ATS, AURA, AURORA, AVALANCHE, AVALANCHE 1500, AZTEK, BLAZER, BOLT EV, BONNEVILLE, BRAVADA, CAMARO, CANYON, CAPRICE, CAPTIVA, CAPTIVA SPORT, CASCADA, CAVALIER, CENTURY, CITY EXPRESS, COBALT, COLORADO, CORVETTE, CRUZE, CT4, CT5, CT6, CTS, DEVILLE, DTS, ELDORADO, ELR, ENCLAVE, ENCORE, ENVISION, ENVOY, EQUINOX, ESCALADE, ESCALADE ESV, EXPRESS, EXPRESS 1500, EXPRESS 2500, EXPRESS 3500, EXPRESS 4500, FIREBIRD, G3, G4, G5, G6, GRAND AM, GRAND PRIX, H2, H3, HHR, IMPALA, INTRIGUE, ION, JIMMY, JIMMY CLASSIC, LACROSSE, LESABRE, LUCERNE, LUMINA, MALIBU, METRO, MONTANA, MONTE CARLO, OUTLOOK, P SERIES, PARK AVENUE, PRIZM, RAINIER, REGAL, RELAY, RENDEZVOUS, S10, SAFARI, SAVANA, SAVANA 2500, SAVANA 3500, SEVILLE, SIERRA 1500, SIERRA 2500, SIERRA 3500, SILHOUETTE, SILVERADO 1500, SILVERADO 2500, SILVERADO 3500, SKY, SOLSTICE, SONIC, SONOMA, SPARK, SRX, SS, SSR, STS, SUBURBAN, SUNFIRE, TAHOE, TERRAIN, TERRAZA, TORRENT, TRACKER, TRAILBLAZER, TRAVERSE, TRAX, UPLANDER, VENTURE, VERANO, VIBE, VOLT, VUE, XLR, XT4, XT5, XT6, XTS, YUKON (2000–2022) — 1010 vehicle combinations

350000 EQUIPMENT

This Preliminary Information communication provides information to the technician about installing General Motors Accessory parts/kits. Technicians should refer to Service Information for information regarding most accessories. Technician

BUICK — ACADIA, BLAZER, BOLT EV, CT6, ENCLAVE, ENCORE GX, EQUINOX, LACROSSE, SIERRA 1500, SILVERADO 1500, TERRAIN, TRAVERSE, XT4, XT5, XT6 (2019–2021) — 37 vehicle combinations

110000 ELECTRICAL SYSTEM

This Preliminary information communicates a condition where the Video Processing Control Module is not able to be programmed to the vehicle. This PI offeres a couple workarounds while Engineering evaluates the concern.

BUICK — CT6, LACROSSE, MALIBU (2016–2020) — 13 vehicle combinations

110000 ELECTRICAL SYSTEM

This Preliminary information communicates that a vehicle may exhibit a Adaptive Cruise Control Unavailable and/or Lane Keep Assist Unavailable message. The technician may attempt to program the Active Safety Control Module (ASCM) and encoun

BUICK — CRUZE, ENCORE, EQUINOX, MALIBU, TERRAIN, TRAX (2018–2021) — 18 vehicle combinations

116610 ELECTRICAL SYSTEM:IGNITION:COIL:HIGH TENSION/SPARK PLUG WIRES

This Preliminary information communicates the possibility of a misfire occuring due to a broken center insulator on the spark plug.

BUICK — ACADIA, BLAZER, ENVISION, EQUINOX, IMPALA, TERRAIN (2019–2020) — 36 vehicle combinations

100000 POWER TRAIN

This Preliminary information communicates to the technician the vehicle concern of starter flex plate having broken teeth. This can create a noise during starting or may even have the starter spin but not crank over the engine. The documen

BUICK — ENCORE GX, TRAILBLAZER (2021) — 2 vehicle combinations

110000 ELECTRICAL SYSTEM

This Preliminary information communicates to the dealer that if the front wipers only work on high speed and fall between the build dates listed to replace the X50A Fuse Block-Underhood.

BUICK — CORVETTE, CT4, CT5, ENVISION, ESCALADE, SUBURBAN, TAHOE, YUKON (2020–2021) — 44 vehicle combinations

110000 ELECTRICAL SYSTEM

This Preliminary information communicates a parts restriction is in place for the Body Control Module on 2020 Cadillac CT4, CT5, Chevrolet Corvette, Suburban, Tahoe and GMC Yukon.

BUICK — 3500, 4500HD, 5500HD, 9-3, 9-5, 9-7X, ACADIA, ASTRA, ATS, AURA, AVALANCHE, AVEO, BLAZER, BOLT EV, C SERIES, CAMARO, CANYON, CAPRICE, CAPTIVA, CAPTIVA SPORT, CASCADA, CHEYENNE, CITY EXPRESS, COBALT, COLORADO, CORVETTE, CRUZE, CT4, CT5, CT6, CTS, CTS-V, DTS, ELR, ENCLAVE, ENCORE, ENVISION, ENVOY, EQUINOX, ESCALADE, ESCALADE ESV, ESCALADE EXT, EXPRESS, EXPRESS 1500, EXPRESS 2500, EXPRESS 3500, EXPRESS 4500, G3, G5, G6, G8, GRAND PRIX, GTO, H SERIES, H2, H3, HHR, IMPALA, ION, LACROSSE, LUCERNE, MALIBU, MONTANA, MONTE CARLO, N300, N300 MAX, OPTRA, ORLANDO, OUTLOOK, PURSUIT, RAINIER, REGAL, RELAY, RENDEZVOUS, S10, SAVANA, SAVANA 2500, SAVANA 3500, SIERRA 1500, SIERRA 2500, SIERRA 3500, SIERRA DENALI, SILVERADO 1500, SILVERADO 2500, SILVERADO 3500, SKY, SOLSTICE, SONIC, SPARK, SPARK EV, SRX, SS, STS, SUBURBAN, T SERIES, TAHOE, TERRAIN, TERRAZA, TOPKICK, TORRENT, TRAILBLAZER, TRAVERSE, TRAX, UPLANDER, VERANO, VIBE, VOLT, VUE, W-SERIES, XLR, XT4, XT5, XT6, XTS, YUKON, YUKON DENALI, YUKON DENALI XL, YUKON XL (2007–2022) — 1800 vehicle combinations

100000 POWER TRAIN

This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble

BUICK — ACADIA, ATS, BLAZER, BOLT EV, CAMARO, CANYON, CAPRICE, CAPTIVA, CASCADA, CITY EXPRESS, COLORADO, CORVETTE, CRUZE, CT4, CT5, CT6, CTS, ELR, ENCLAVE, ENCORE, ENVISION, EQUINOX, ESCALADE, ESCALADE ESV, EXPRESS, EXPRESS 1500, EXPRESS 2500, EXPRESS 3500, EXPRESS 4500, IMPALA, LACROSSE, MALIBU, REGAL, SAVANA, SIERRA 1500, SIERRA 2500, SILVERADO 1500, SILVERADO 2500, SILVERADO 3500, SONIC, SPARK, SRX, SS, SUBURBAN, TAHOE, TERRAIN, TRAILBLAZER, TRAVERSE, TRAX, VERANO, VOLT, XT4, XT5, XT6, XTS, YUKON (2014–2022) — 317 vehicle combinations

118420 ELECTRICAL SYSTEM:ADAS:BLINDSPOT:SENSORS

This Preliminary information communicates additional information on how a LIN bus operates and diagnostic tips when working on a LIN bus.

BUICK — CRUZE, ENCORE, EQUINOX, MALIBU, TERRAIN, TRAX (2018–2021) — 54 vehicle combinations

060000 ENGINE (PWS)

This Preliminary information communicates the possibility of a misfire occuring due to a broken center insulator on the spark plug.

BUICK — ENCORE GX, TRAILBLAZER (2021) — 4 vehicle combinations

110000 ELECTRICAL SYSTEM

This Preliminary information communicates to the dealer that if the front wipers only work on high speed and fall between the build dates listed to replace the X50A Fuse Block-Underhood.

BUICK — ACADIA, BLAZER, ENCLAVE, EQUINOX, LACROSSE, REGAL, TERRAIN, TRAVERSE, XT4, XT5, XT6 (2018–2021) — 140 vehicle combinations

110000 ELECTRICAL SYSTEM

This Preliminary information communicates that there some service parts released to dealers missing software.

BUICK — ENCLAVE, TRAVERSE (2021) — 4 vehicle combinations

062000 ENGINE AND ENGINE COOLING:COOLING SYSTEM

This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the A/C not cooling the vehicle cabin and/or the A/C air is not cold coming

BUICK — ACADIA, BLAZER, CANYON, COLORADO, ENCLAVE, TRAVERSE, XT5, XT6 (2020–2021) — 40 vehicle combinations

034520 SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:PADS

This technical bulletin provides repair information to correct a customer concern of hearing front brake grind/groan noise after sitting overnight.

BUICK — CORVETTE, CT4, CT5, ENVISION, ESCALADE, SUBURBAN, TAHOE, YUKON (2020–2021) — 11 vehicle combinations

110000 ELECTRICAL SYSTEM

This Preliminary information communicates a parts restriction is in place for the Body Control Module on 2020 Cadillac CT4, CT5, Chevrolet Corvette, Suburban, Tahoe and GMC Yukon.

BUICK — LACROSSE, SIERRA 1500, SILVERADO 1500 (2016–2019) — 20 vehicle combinations

110000 ELECTRICAL SYSTEM

This service bulletin provides information on High Voltage Battery Module Replacement.

BUICK — ENVISION (2021) — 4 vehicle combinations

026000 TRACTION CONTROL SYSTEM

This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the Traction Control System and/or Electronic Stability Control message illu

BUICK — ACADIA, BLAZER, ENCLAVE, TRAVERSE, XT5, XT6 (2019–2021) — 15 vehicle combinations

100000 POWER TRAIN

This Preliminary information communicates to perform a transmission fluid drain and fill to correct a TCC shudder concern.

BUICK — ENCORE GX, TRAILBLAZER (2021) — 6 vehicle combinations

060000 ENGINE (PWS)

Service Update. Certain vehicles equipped with a 1.3L gasoline engine (RPO L3T), have cylinder head outer bolts which were not tightened. Dealers are to retighten the cylinder head outer bolts.