Technical Service Bulletins (TSB)

BUICK — ACADIA, BLAZER, ENCLAVE, EQUINOX, TERRAIN (2019–2020) — 10 vehicle combinations

110000 ELECTRICAL SYSTEM

This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to multiple DTC?s set after a battery discharge, jump start and/or battery replacemen

BUICK — CASCADA (2016–2019) — 8 vehicle combinations

161000 STRUCTURE:FRAME AND MEMBERS

This technical bulletin provides repair information to correct a customer concern of water sloshing in quarter panel area when accelerating or stopping and/or long period of water draining from rear wheel well after vehicle is parked.

BUICK — ATS, CAMARO, CORVETTE, CTS, CTS-V, REGAL, SS (2012–2021) — 38 vehicle combinations

190000 TIRES

This service bulletin provides information on tire cold weather cracking and the proper techniques on taking care of the tires and proper use.

BUICK — ACADIA, ATS, AVEO, BLAZER, BOLT EV, CAMARO, CANYON, CAPRICE, CAPTIVA, CASCADA, CHEYENNE, CITY EXPRESS, COLORADO, CORVETTE, CRUZE, CT4, CT5, CT6, CTS, ELR, ENCLAVE, ENCORE, ENCORE GX, ENVISION, EQUINOX, ESCALADE, ESCALADE ESV, EXPRESS, IMPALA, LACROSSE, MALIBU, N300, N300 MAX, ORLANDO, REGAL, S10, SAVANA, SIERRA 1500, SIERRA 2500, SIERRA DENALI, SILVERADO 1500, SILVERADO 2500, SILVERADO 4500HD, SONIC, SPARK, SPARK EV, SRX, SS, SUBURBAN, TAHOE, TERRAIN, TRAILBLAZER, TRAVERSE, TRAX, VERANO, VOLT, XT4, XT5, XT6, XTS, YUKON, YUKON XL (2015–2021) — 301 vehicle combinations

350000 EQUIPMENT

This warranty administration bulletin provides information on Warranty Administration - Customer Concern Not Duplicated (CCND) Labor Operation Numbers.

BUICK — 3500, 4500 SERIES, 4500HD, 5500HD, 9-3, 9-5, 9-7X, ACADIA, ALERO, ALERO EXPORT, ASTRA, ASTRO, ATS, AURA, AURORA, AVALANCHE, AVALANCHE 1500, AVALANCHE 2500, AVEO, AZTEK, B7, B7 MEDIUM DUTY, BLAZER, BOLT EV, BONNEVILLE, BRAVADA, C SERIES, CAMARO, CANYON, CAPRICE, CAPTIVA, CAPTIVA SPORT, CASCADA, CATERA, CAVALIER, CENTURY, CHEVY VAN, CHEYENNE, CITY EXPRESS, CLASSIC, COBALT, COLORADO, CONVENTIONAL, CORVETTE, CRUZE, CT6, CTS, CTS-V, DEVILLE, DTS, ELDORADO, ELR, ENCLAVE, ENCORE, ENVISION, ENVOY, ENVOY XL, ENVOY XUV, EPICA, EQUINOX, ESCALADE, ESCALADE ESV, ESCALADE EXT, ESCALADE EXT 1500, EXPRESS, F SERIES, FIREBIRD, G SERIES, G VAN BUS, G3, G5, G6, G8, GM, GRAND AM, GRAND PRIX, GTO, H SERIES, H2, H3, HHR, IMPALA, INTRIGUE, ION, JIMMY, JIMMY CLASSIC, L SERIES, L200, L300, LACROSSE, LESABRE, LOW CAB 4500, LOW CAB 5500, LUCERNE, LUMINA, LW200, M SERIES, M VAN, M/L VAN, MALIBU, METRO, MONTANA, MONTANA EXT, MONTE CARLO, N300, N300 MAX, OPTRA, ORLANDO, OUTLOOK, P SERIES, PARK AVENUE, PRIZM, PURSUIT, RAINIER, REGAL, RELAY, RENDEZVOUS, RIVIERA, S10, SAFARI, SAFARI (GMC), SAVANA, SEVILLE, SIERRA 1500, SIERRA 2500, SIERRA DENALI, SILHOUETTE, SILVERADO 1500, SILVERADO 1500 HD, SILVERADO 2500, SILVERADO 2500 HD, SILVERADO 3500, SILVERADO 3500 HD, SKY, SL, SOLSTICE, SONIC, SONOMA, SPARK, SPARK EV, SRX, SS, SSR, STS, SUBURBAN, SUNFIRE, T SERIES, TAHOE, TERRAIN, TERRAZA, TOPKICK, TORRENT, TRACKER, TRAILBLAZER, TRANS SPORT, TRAVERSE, TRAX, UPLANDER, V SERIES, VENTURE, VERANO, VIBE, VOLT, VUE, W SERIES, W-SERIES, XLR, XT5, XTS, YUKON, YUKON DENALI, YUKON DENALI XL, YUKON XL (2000–2018) — 1083 vehicle combinations

060000 ENGINE AND ENGINE COOLING

This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308 and/or P050D

BUICK — ACADIA, ATS, BLAZER, BOLT EV, CT6, CTS, ENCLAVE, EQUINOX, ESCALADE, ESCALADE ESV, MALIBU, SIERRA 1500, SIERRA 2500, SILVERADO 1500, SILVERADO 2500, SUBURBAN, TAHOE, TERRAIN, TRAVERSE, VOLT, XT4, XT5, XTS, YUKON DENALI, YUKON XL (2013–2021) — 98 vehicle combinations

260000 FORWARD COLLISION AVOIDANCE

This Preliminary information communicates a "Forward Collision System Reduced" message displayed on the DIC when the Forward Automatic Braking has been set to the "Alert" setting. This is normal when the FAB has been set to "Alert".

BUICK — ENCORE GX, TRAILBLAZER (2020–2021) — 2 vehicle combinations

063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR

Emission Recall - General Motors has decided to conduct a voluntary emission recall on certain vehicles with a 1.2L engine (RPO LIH). These vehicles may have received incorrect catalytic converter parts that do not meet all emission system

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

060000 ENGINE AND ENGINE COOLING

This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to loss of and/or reduced propulsion and multiple DTCs set.

BUICK — ENCLAVE, TRAVERSE (2018–2020) — 6 vehicle combinations

060000 ENGINE AND ENGINE COOLING

This Preliminary information communicates a poor weld or low weld adhesion for the bracket on the Bank 2 front exhaust pipe causing multiple possible concerns and the recommended repairs. Added 2020 MY.

BUICK — ENCORE GX, TRAILBLAZER (2020–2021) — 2 vehicle combinations

063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR

Emission Recall - General Motors has decided to conduct a voluntary emission recall on certain vehicles with a 1.2L engine (RPO LIH). These vehicles may have received incorrect catalytic converter parts that do not meet all emission system

BUICK — 3500, 4500HD, 5500HD, ACADIA, ATS, AVALANCHE, AVEO, BLAZER, BOLT EV, CAMARO, CANYON, CAPRICE, CAPTIVA, CAPTIVA SPORT, CASCADA, CITY EXPRESS, COLORADO, CORVETTE, CRUZE, CT4, CT5, CT6, CTS, CTS-V, ELR, ENCLAVE, ENCORE, ENCORE GX, ENVISION, EQUINOX, ESCALADE, ESCALADE ESV, ESCALADE EXT, EXPRESS, IMPALA, LACROSSE, LOW CAB 4500, LOW CAB 5500, LOW CAB FORWARD 6500, LUCERNE, MALIBU, N300, N300 MAX, REGAL, SAVANA, SIERRA 1500, SIERRA 2500, SIERRA DENALI, SILVERADO 1500, SILVERADO 2500, SILVERADO 3500, SILVERADO 4500HD, SONIC, SPARK, SPARK EV, SRX, SS, SUBURBAN, SUBURBAN 1500, TAHOE, TERRAIN, TRAILBLAZER, TRAVERSE, TRAX, VERANO, VOLT, XT4, XT5, XT6, XTS, YUKON, YUKON DENALI, YUKON DENALI XL, YUKON XL (2012–2021) — 415 vehicle combinations

355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

This Warranty Administration bulletin provides information on Dealer Empowerment for Goodwill, Customer Enthusiasm and Policy (U.S. Only).

BUICK — ACADIA, BLAZER, ENCLAVE, TRAVERSE, XT5, XT6 (2017–2021) — 22 vehicle combinations

130000 VISIBILITY

This Preliminary information communicates that a customer may come to the dealer with a complaint of a hum, drone or pulsing type noise at times. On investigation the dealer may discover that this concern only occurs when the customer is d

BUICK — ENCORE GX, TRAILBLAZER (2020–2021) — 2 vehicle combinations

060000 ENGINE (PWS)

This Preliminary Information communication advises the technician that the engine exchange program on vehicles equipped with engine Regular Production Option Code LIH has ended. This engine can now be ordered through the regular General Mot

BUICK — ENVISION (2021)

110000 ELECTRICAL SYSTEM

This preliminary information discusses that Customer will see Service Headlamp message on DIC. Adaptive Forward Lighting (AFL) will set DTC C103D.11 sending it into failsafe state. Technician should reprogram AFL module to repair concern.

BUICK — ACADIA, ATS, BLAZER, CAMARO, CANYON, COLORADO, CTS, ENVISION, EQUINOX, IMPALA, MALIBU, REGAL, TERRAIN, TRAVERSE (2013–2020) — 140 vehicle combinations

060000 ENGINE (PWS)

This preliminary informational (PI) provides diagnosis and repair information regarding bearing damage or when an engine will not rotate.

BUICK — ACADIA, BLAZER, CAMARO, ENCLAVE, ENCORE GX, SIERRA 1500, SIERRA 2500, SIERRA 3500, SILVERADO 1500, SILVERADO 2500, SILVERADO 3500, TRAILBLAZER, TRAVERSE, XT4, XT5, XT6 (2020) — 133 vehicle combinations

118000 ELECTRICAL SYSTEM:SOFTWARE

This technical bulletin provides programming information for Radio Software Version U150 Update to correct software issues on infotainment systems IOS, IOT or IOU.

BUICK — ENCORE GX, TRAILBLAZER (2020–2021) — 3 vehicle combinations

110000 ELECTRICAL SYSTEM

Service Update - Certain vehicles may have condition that a MIL illuminates on the dash and technicians may find one or more following DTC(s) sets: P2B95, P2B08, P2B09, P2B0A, P2B96, P2B00, P2B01, or P2B02. Dealers are required to reprogra

BUICK — ENCORE GX, TRAILBLAZER (2020–2021) — 2 vehicle combinations

060000 ENGINE AND ENGINE COOLING

This Preliminary Information communication advises the technician that the engine exchange program on vehicles equipped with engine Regular Production Option Code L3T has ended. This engine can now be ordered through the regular General Mot

BUICK — ENCORE GX, TRAILBLAZER (2020–2021) — 2 vehicle combinations

060000 ENGINE AND ENGINE COOLING

Stop Delivery. Incorrect emission parts may have been installed on these vehicles.

BUICK — ACADIA, BLAZER, ENCLAVE, SIERRA 1500, SILVERADO 1500, TRAVERSE, XT5 (2017–2019) — 13 vehicle combinations

030000 BRAKES (PWS)

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

BUICK — ENCORE GX (2020–2021) — 2 vehicle combinations

040000 SERVICE BRAKES, AIR

Service Update Bulletin. On certain Buick Encore GX vehicles, the brake system control module may incorrectly calculate the brake pad life percentage values in the pad wear sensor transition areas, causing a ?Replace Soon? or ?Replace Now?

BUICK — ENVISION (2019–2020) — 4 vehicle combinations

270000 LANE DEPARTURE

This technical bulletin provides repair information to correct a customer concern of Lane Keep Assist Unintentionally Moves Vehicle Slightly Left or Right.

BUICK — ACADIA, ATS, BLAZER, CAMARO, CT6, CTS, LACROSSE, REGAL, XT5, XT6 (2016–2021) — 40 vehicle combinations

060000 ENGINE AND ENGINE COOLING

This informational bulletin provides information on the new oil filter UPF63R to be used on the HFV6 Engines.

BUICK — ACADIA, BLAZER, CANYON, COLORADO, CT5, ENCORE GX, ESCALADE, MALIBU, SIERRA 1500, SIERRA 2500, SILVERADO 1500, SILVERADO 2500, SUBURBAN, TAHOE, XT4, XT5, XT6, YUKON, YUKON XL (2021) — 31 vehicle combinations

110000 ELECTRICAL SYSTEM

This informational bulletin provides information for dealers/technicians on Normal Characteristic - Wireless Phone Projection Audio Cuts Out Every 10 Seconds on New/Unsold Vehicles.

BUICK — CASCADA (2016)

060000 ENGINE AND ENGINE COOLING

Special Coverage Adjustment - certain vehicles, equipped with a 1.6L engine, may have a condition where cracks can develop in the diaphragm of the Positive Crankcase Ventilation (PCV) pressure regulator valve. This valve is a part of the en