Technical Service Bulletins (TSB)

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

050000 PARKING BRAKE

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

BUICK — CANYON, COLORADO, ENVISION, EQUINOX, TERRAIN (2015–2020) — 21 vehicle combinations

030000 BRAKES (PWS)

This preliminary information discusses potential for a code C0010.5A to store in the brake controller which appears to be setting falsely or is induced by the customer.

BUICK — ACADIA, BLAZER, CRUZE, ENCLAVE, ENVISION, EQUINOX, LACROSSE, MALIBU, REGAL, TERRAIN, TRAVERSE, XT4, XT5, XT6 (2017–2020) — 34 vehicle combinations

100000 POWER TRAIN

This Preliminary information communicates a possible BCM concern if DTC P0747 sets during engine cranking when the transmission is in park.

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

110100 ELECTRICAL SYSTEM:HORN

This technical bulletin provides a procedure to replace the right side low note horn assembly to fix a frequency that will cause distorted noise when reflecting off of the original horn assembly bracket.

BUICK — ATS, CTS, REGAL, TERRAIN, XTS (2018–2019) — 8 vehicle combinations

350000 EQUIPMENT

This technical bulletin provides repair information to correct a customer concern of Connected Navigation and Live Traffic Services Inoperative.

BUICK — ENVISION (2019)

110000 ELECTRICAL SYSTEM

This preliminary information discusses potential for a rough idle concern caused by electrical interference from the generator. Engineering is working on a field fix.

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

070000 FUEL SYSTEM, GASOLINE

This Preliminary information communicates noise condition that has been identified and the repair that is in process.

BUICK — ACADIA, ATS, CT6, CTS, ENCLAVE, ENVISION, EQUINOX, LACROSSE, TERRAIN, TRAVERSE, XT4, XT5, XTS (2015–2020) — 50 vehicle combinations

270000 LANE DEPARTURE

This Preliminary Information communicates to the technician that some customers may comment on the operation of their haptic seat during a Lane Keep Assist event. Lane Keep Assist works differently than Lane Departure Warning. The Lane Keep

BUICK — CAMARO, CASCADA, CORVETTE, G6, XLR (2004–2020) — 41 vehicle combinations

162900 STRUCTURE:BODY:ROOF AND PILLARS

This Preliminary Information communicates helpful information on diagnosing general customer concerns related to a power folding top.

BUICK — 9-7X, ACADIA, ASTRA, ATS, AURA, AVALANCHE, AVALANCHE 1500, AVALANCHE 2500, AVEO, BLAZER, BOLT EV, C SERIES, CAMARO, CANYON, CAPRICE, CAPTIVA, CASCADA, CITY EXPRESS, CLASSIC, COBALT, COLORADO, CORVETTE, CRUZE, CT4, CT5, CT6, CTS, DTS, ELR, ENCLAVE, ENCORE, ENVISION, ENVOY, ENVOY XL, EQUINOX, ESCALADE, ESCALADE ESV, ESCALADE EXT, ESCALADE EXT 1500, EXPRESS, G3, G5, G6, G8, GRAND PRIX, GTO, H2, H3, HHR, IMPALA, ION, LACROSSE, LESABRE, LUCERNE, MALIBU, MONTANA, MONTE CARLO, OUTLOOK, PURSUIT, RAINIER, REGAL, RELAY, RENDEZVOUS, SAVANA, SIERRA, SIERRA 1500, SIERRA 2500, SIERRA DENALI, SILVERADO, SILVERADO 1500, SILVERADO 2500, SILVERADO 4500HD, SKY, SOLSTICE, SONIC, SPARK, SPARK EV, SRX, SS, SSR, STS, SUBURBAN, T SERIES, TAHOE, TERRAIN, TERRAZA, TOPKICK, TORRENT, TRAILBLAZER, TRAVERSE, TRAX, UPLANDER, VERANO, VIBE, VOLT, VUE, XLR, XT4, XT5, XT6, XTS, YUKON, YUKON DENALI, YUKON DENALI XL, YUKON XL (2006–2020) — 677 vehicle combinations

350000 EQUIPMENT

This preliminary information bulletin provides information om Service Programming System (SPS) Error Codes (E4398, E4399, E4403, M4404, M4413, M6954, M6955, E4414, E4423, E4491 or E6961).

BUICK — ACADIA, ENCLAVE, TRAVERSE (2013–2017) — 30 vehicle combinations

060000 ENGINE (PWS)

This technical bulletin provides repair information to correct a customer concern of potential reduced engine power message displayed and/or engine stall with DTCs P1682 and/or P0689 Set.

BUICK — BRAVADA, ENVOY, ENVOY XL, ENVOY XL 370, ENVOY XUV, RAINIER, TRAILBLAZER, TRAILBLAZER EXT, TRAILBLAZER EXT 370 (2002–2009) — 36 vehicle combinations

060000 ENGINE AND ENGINE COOLING

This Preliminary information communicates diagnostic information for a front noise.

BUICK — CANYON, COLORADO, ENVISION, EQUINOX, TERRAIN (2018–2020) — 15 vehicle combinations

030000 BRAKES (PWS)

This preliminary information discusses potential for a code C0010.5A to store in the brake controller which appears to be setting falsely or is induced by the customer.

BUICK — ACADIA, BLAZER, CAMARO, CT6, ENCLAVE, ENCORE, SIERRA 1500, SIERRA 2500, SILVERADO 1500, SILVERADO 2500, SILVERADO 3500, TRAVERSE, XT4, XT5, XT6 (2020) — 40 vehicle combinations

118000 ELECTRICAL SYSTEM:SOFTWARE

This Technical bulletin provides a service procedure for dealers/technicians on installation of Radio Software Version U148 Over-the-Air Update.

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

185000 VEHICLE SPEED CONTROL:CRUISE CONTROL

N192272470 - Service Update. Customers may experience an error message stating: ?Lane Keep Assist Unavailable?, ?Adaptive Cruise Temporarily Unavailable?, or ?Forward Collision System Unavailable?. Lane Keep Assist (LKA), Adaptive Cruise

BUICK — 88, 98, ACHIEVA, ALERO, ASTRO, AURORA, AZTEK, BONNEVILLE, CAMARO, CAPRICE, CAVALIER, CENTURY, CORVETTE, CUTLASS, EV1, EXPRESS, FIREBIRD, FLEETWOOD, G VAN, GMC TRUCK, GRAND AM, GRAND PRIX, IMPALA, INTRIGUE, LESABRE, LS, LUMINA, LUMINA APV, LW200, MALIBU, METRO, MONTE CARLO, P, P SERIES, PARK AVENUE, PICKUP, PRIZM, REGAL, RIVIERA, ROADMASTER, S/T PICKUP, SAFARI, SAVANA, SC, SKYLARK, SL, SUBURBAN, SUNFIRE, SW, TAHOE, TRACKER, TRANS SPORT, YUKON (1994–2002) — 406 vehicle combinations

110000 ELECTRICAL SYSTEM

This informational bulletin provides information for dealers/technicians on Procedures to Unlock Delco Radio with Theftlock.

BUICK — ENCORE, TRAX (2017–2020) — 8 vehicle combinations

130000 VISIBILITY

This technical bulletin provides a procedure to correct a condition of wiper blades streaky, Do Not Clean and/or Noisy.

BUICK — 3500, 4500HD, 5500HD, 9-7X, ACADIA, ALERO, ASTRA, ASTRO, ATS, AURA, AURORA, AVALANCHE, AVALANCHE 1500, AVALANCHE 2500, AVEO, AZTEK, BLAZER, BOLT EV, BONNEVILLE, BRAVADA, C SERIES, CAMARO, CANYON, CAPRICE, CAPTIVA, CASCADA, CAVALIER, CENTURY, CITY EXPRESS, CLASSIC, COBALT, COLORADO, CONVENTIONAL, CORVETTE, CRUZE, CT4, CT5, CT6, CTS, DEVILLE, DTS, ELDORADO, ELR, ENCLAVE, ENCORE, ENVISION, ENVOY, ENVOY XL, ENVOY XUV, EQUINOX, ESCALADE, ESCALADE ESV, ESCALADE EXT, ESCALADE EXT 1500, EXPRESS, FIREBIRD, G SERIES, G VAN BUS, G3, G5, G6, G8, GM, GRAND AM, GRAND PRIX, GTO, H2, H3, HHR, IMPALA, INTRIGUE, ION, JIMMY, JIMMY CLASSIC, L SERIES, L200, L300, LACROSSE, LESABRE, LOW CAB 4500, LOW CAB 5500, LOW CAB FORWARD 6500, LUCERNE, LW200, M SERIES, MALIBU, MONTANA, MONTANA EXT, MONTE CARLO, OUTLOOK, PARK AVENUE, PRIZM, PURSUIT, RAINIER, REGAL, RELAY, RENDEZVOUS, S10, SAFARI, SAVANA, SEVILLE, SIERRA, SIERRA 1500, SIERRA 2500, SIERRA 3500, SIERRA DENALI, SILHOUETTE, SILVERADO, SILVERADO 1500, SILVERADO 1500 HD, SILVERADO 2500, SILVERADO 2500 HD, SILVERADO 3500, SILVERADO 4500HD, SILVERADO 5500HD, SILVERADO 6500HD, SKY, SL, SOLSTICE, SONIC, SONOMA, SPARK, SPARK EV, SRX, SS, SSR, STS, SUBURBAN, SUNFIRE, T SERIES, TAHOE, TERRAIN, TERRAZA, TOPKICK, TORRENT, TRACKER, TRAILBLAZER, TRAVERSE, TRAX, UPLANDER, VENTURE, VERANO, VIBE, VOLT, VUE, W-SERIES, XLR, XT4, XT5, XT6, XTS, YUKON, YUKON DENALI, YUKON DENALI XL, YUKON XL (2002–2020) — 1952 vehicle combinations

350000 EQUIPMENT

This informational bulletin provides information on key code security rules and information on GM keycode look-up applications.

BUICK — ENCLAVE, TRAVERSE (2018–2020) — 24 vehicle combinations

110000 ELECTRICAL SYSTEM

This technical bulletin provides repair information to correct a customer concern of the Accessory Rear Seat Infotainment (RSI) shuts off, coinciding with closing of a door or liftgate.

BUICK — ENCLAVE, TRAVERSE (2018–2019) — 4 vehicle combinations

284100 BACK OVER PREVENTION: SENSING SYSTEM: CAMERA

This Preliminary information communicates concern with the rear vision camera or surround vision camera image

BUICK — LACROSSE, MALIBU, REGAL, XT4 (2016–2019) — 30 vehicle combinations

010000 STEERING

This engineering information (EI) closure ends the need for information from the field on a stick-slip type condition felt in steering wheel at highway speeds. If a vehicle is encountered with the this condition, refer to SI for further dia

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, CITY EXPRESS, COBALT, COLORADO, CORVETTE, CRUZE, CT4, CT5, CT6, CTS, DTS, ELR, ENCLAVE, ENCORE, ENVISION, ENVOY, EQUINOX, ESCALADE, ESCALADE ESV, ESCALADE EXT, EXPRESS, G VAN BUS, G3, G5, G6, G8, H2, H3, HHR, IMPALA, LACROSSE, LOW CAB 4500, LUCERNE, MALIBU, MONTANA, OUTLOOK, PURSUIT, REGAL, SAVANA, SIERRA, SIERRA 1500, SIERRA 2500, SIERRA 3500, SIERRA DENALI, SILVERADO, SILVERADO 1500, SILVERADO 2500, SILVERADO 3500, SILVERADO 4500HD, SILVERADO 5500HD, SILVERADO 6500HD, SKY, SOLSTICE, SONIC, SPARK, SPARK EV, SRX, SS, STS, SUBURBAN, T SERIES, TAHOE, TERRAIN, TOPKICK, TORRENT, TRAILBLAZER, TRAVERSE, TRAX, UPLANDER, VERANO, VIBE, VOLT, VUE, W-SERIES, XT4, XT5, XT6, XTS, YUKON, YUKON DENALI, YUKON DENALI XL, YUKON XL (2009–2020) — 1104 vehicle combinations

350000 EQUIPMENT

This informational bulletin provides information for dealers/technicians on Use of Dealer Case Management (DCM) and Being Prepared for Contacting U.S. Technical Assistance (TAC).

BUICK — ACHIEVA, ALERO, ALERO EXPORT, ASTRO, AURORA, AVALANCHE 1500, AVALANCHE 2500, AZTEK, B6 MEDIUM DUTY, B7, B7 CHASSIS, B7 MEDIUM DUTY, BERETTA, BLAZER, BONNEVILLE, BRAVADA, BUS CHASSIS, CAMARO, CAPRICE, CATERA, CAVALIER, CENTURY, CHEVY VAN, CONVENTIONAL, CORSICA, CORVETTE, CREW CAB, CUTLASS, DEVILLE, ELDORADO, ENVOY, ESCALADE, ESCALADE EXT 1500, EXPRESS, FIREBIRD, FLEETWOOD, G SERIES, G VAN, G VAN BUS, GM, GMC TRUCK, GRAND AM, GRAND PRIX, H SERIES, IMPALA, INTRIGUE, JIMMY, L SERIES, LESABRE, LUMINA, LUMINA APV, LW200, M SERIES, M VAN, M/L VAN, MALIBU, METRO, MONTANA, MONTANA EXT, MONTE CARLO, P, P SERIES, P3, P30 CHASSIS, PARK AVENUE, PICKUP, PRIZM, REGAL, RENDEZVOUS, RIVIERA, ROADMASTER, S PICKUP, S/T PICKUP, S10, S10 PICKUP, SAFARI, SAFARI (GMC), SAVANA, SEVILLE, SILHOUETTE, SILVERADO 1500 HD, SILVERADO 2500 HD, SILVERADO 3500, SILVERADO 3500 HD, SKYLARK, SL, SONOMA, SUBURBAN, SUNBIRD, SUNFIRE, TAHOE, TRACKER, TRAILBLAZER, TRANS SPORT, V SERIES, VENTURE, VUE, W SERIES, W-SERIES, YUKON, YUKON DENALI, YUKON XL (1994–2002) — 1048 vehicle combinations

353100 EQUIPMENT:ELECTRICAL:ANTI-THEFT DEVICES

This Preliminary Information communication provides information to the technician on how to unlock radios that are Delco TheftLock. Technician will use the radio to get the scrambled code. Technician will need to contact the radio unlock ce

BUICK — ENVISION (2019)

251000 ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC)

This technical bulletin provides repair information to correct a customer concern of Service Stabilitrak Message Displayed with Stability Control Disabled.

BUICK — 3500, ACADIA, ATS, AVEO, BOLT EV, CAMARO, CANYON, CAPRICE, CAPTIVA, CASCADA, CHEYENNE, CITY EXPRESS, COLORADO, CORVETTE, CRUZE, CT6, CTS, ELR, ENCLAVE, ENCORE, ENVISION, EQUINOX, ESCALADE, ESCALADE ESV, EXPRESS, IMPALA, LACROSSE, LOW CAB 4500, LOW CAB 5500, LOW CAB FORWARD 4500, LOW CAB FORWARD 5500, MALIBU, N300, N300 MAX, ORLANDO, REGAL, S10, SAVANA, SIERRA, SIERRA 2500, SIERRA DENALI, SILVERADO, SILVERADO 1500, SILVERADO 2500, SILVERADO 3500, SONIC, SPARK, SPARK EV, SRX, SS, SUBURBAN, TAHOE, TERRAIN, TRAILBLAZER, TRAVERSE, TRAX, VERANO, VOLT, XT5, XTS, YUKON, YUKON XL (2015–2018) — 190 vehicle combinations

100000 POWER TRAIN

This Preliminary information communicates to the dealer technician that TAC recommends the utilization of the GDS2 software to aid in diagnosing automatic transmission concerns. TAC is requesting the GDS2 session logs be sent in before the