Technical Service Bulletins (TSB)

CHEVROLET — SILVERADO 4500HD, SILVERADO 5500HD, SILVERADO 6500HD (2019–2024) — 54 vehicle combinations

036400 SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:ABS WARNING LIGHT

This Preliminary information communicates information to verify if the vehicle frame has been lengthened or shorted as a result of the vehicle upfit. Dealer to refer to GM Upfitter bulletin 171 if frame has been modified.

CHEVROLET — SIERRA 1500, SIERRA 2500, SIERRA 3500, SILVERADO 1500, SILVERADO 2500, SILVERADO 3500, SUBURBAN, TAHOE, YUKON (2024) — 18 vehicle combinations

110000 ELECTRICAL SYSTEM

This Preliminary information communicates information about the cluster missing graphics while viewing the progressive theme at times. Engineering is currently working on a repair.

CHEVROLET — CORVETTE (2020–2024) — 5 vehicle combinations

350000 EQUIPMENT

This Preliminary information communicates the possibility of misboxed/mislabled service parts.

CHEVROLET — BOLT EUV, BOLT EV (2020–2022) — 20 vehicle combinations

110000 ELECTRICAL SYSTEM

Service Update - Certain vehicles may have a condition in which the internal mileage counter has been reset with a subsequent Hybrid/EV Powertrain Control Module 2 reprogramming event causing the HV Battery SOC to be limited to 80% beyond t

CHEVROLET — COLORADO (2024)

200000 WHEELS

This Preliminary Information communicates the possibility the incorrect accessory tires may have been installed on the vehicle.

CHEVROLET — SILVERADO 4500HD, SILVERADO 5500HD, SILVERADO 6500HD (2019–2023) — 15 vehicle combinations

030000 BRAKES (PWS)

This Preliminary information communicates information on where to install check ball and cap if it separates from the brake booster pump motor.

CHEVROLET — CORVETTE (2024) — 2 vehicle combinations

060000 ENGINE AND ENGINE COOLING

Service Update - Certain vehicles, equipped with an 8-cylinder, 5.5 Liter engine, (RPO LT6), may have a condition in which the automatic shift to park function may not work under certain rare and unique conditions. Dealers are to reprogram

CHEVROLET — SUBURBAN, SUBURBAN 1500, TAHOE, YUKON, YUKON XL, YUKON XL 1500 (2021–2024) — 88 vehicle combinations

110000 ELECTRICAL SYSTEM

This technical bulletin provides repair information to correct a customer concern of the E88 Front Floor Console Bin Lamp Inoperative.

CHEVROLET — ACADIA, TRAVERSE (2024) — 6 vehicle combinations

100000 POWER TRAIN

This bulletin advises the technician of a possible normal condition of the transmission but wants the tech to validate that the trans is in working order by taking vehicle on a test drive.

CHEVROLET — SIERRA 1500, SIERRA 2500, SIERRA 3500, SILVERADO 1500, SILVERADO 2500, SILVERADO 3500 (2024) — 6 vehicle combinations

117000 ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

This Preliminary information communicates information about the cluster missing graphics while viewing the progressive theme at times. Engineering is currently working on a repair.

CHEVROLET — SUBURBAN, SUBURBAN 1500, TAHOE, YUKON, YUKON XL (2021–2024) — 12 vehicle combinations

353000 EQUIPMENT:ELECTRICAL

This Preliminary information communicates and issue with the LED right above the wireless charging pad being inoperative and how to resolve the concern with the LED.

CHEVROLET — SIERRA 2500, SILVERADO 2500 (2020–2023) — 8 vehicle combinations

030000 BRAKES (PWS)

This Preliminary information communicates an issue with clearing DTC: C15DD and how to rest the average release time to clear DTC.

CHEVROLET — CANYON, COLORADO (2023–2024) — 8 vehicle combinations

030000 BRAKES (PWS)

This Preliminary information communicates Diagnostic information for the Check Engine Light On, Spongy Brake Pedal Feel, Codes C05D3 and P25A2 Stored.

CHEVROLET — SIERRA 2500, SILVERADO 2500 (2024) — 2 vehicle combinations

355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

This Preliminary information communicates that engineering is investigating the Harsh 7-8 Up Shift MGU MGM MKM.

CHEVROLET — SIERRA 2500, SIERRA 3500, SILVERADO 2500, SILVERADO 3500 (2024) — 24 vehicle combinations

060000 ENGINE AND ENGINE COOLING

This bulletin advises the tech of a possible software anomaly that may cause the codes to set which may require a software update.

CHEVROLET — EQUINOX, TERRAIN (2018–2024) — 14 vehicle combinations

280000 BACK OVER PREVENTION

This preliminary information discusses potential camera functional issues if the camera is not properly programmed.

CHEVROLET — SILVERADO EV (2024)

200000 WHEELS

This Preliminary information communicates an issue seen on some vehicles where the ABS harness rubs on a sharp edge of the drive unit and damages the right rear wheel speed wiring.

CHEVROLET — CANYON, COLORADO (2023–2024) — 4 vehicle combinations

353000 EQUIPMENT:ELECTRICAL

This Preliminary Information communicates the possibility of remote vehicle start being inoperative because it lacks the proper calibrations.

CHEVROLET — SIERRA 1500, SIERRA 2500, SIERRA 3500, SILVERADO 1500, SILVERADO 2500, SILVERADO 3500 (2017–2024) — 80 vehicle combinations

081100 FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY

This informational bulletin provides information on availability for a locking gas cap for trucks are operated in high amount of dirt or dust which can migrate to the filler cap area.

CHEVROLET — CANYON, COLORADO (2024) — 4 vehicle combinations

284100 BACK OVER PREVENTION:DISPLAY FUNCTION

This Preliminary information communicates to dealership technicians and GM Customers that GM is aware of this issue and working on a permanent repair. Once available, this PI will be updated.

CHEVROLET — BLAZER (2024)

115000 ELECTRICAL SYSTEM:BODY CONTROL MODULE/BCM

This Preliminary information communicates that a dealer may find code B1141 set in the BCM. The technician is advised to reprogram the BCM.

CHEVROLET — EQUINOX, TERRAIN (2018–2024) — 28 vehicle combinations

110000 ELECTRICAL SYSTEM

This preliminary information discusses a condition that may arise from the drivers window switch sending an errant message causing the vehicle to enter manual fob learn mode.

CHEVROLET — TRAX (2024)

110000 ELECTRICAL SYSTEM

This Preliminary information communicates to dealers engine wiring harness inspections and engine oil pump diagnostic testing related to MIL on with P0521.

CHEVROLET — BLAZER (2024)

162600 STRUCTURE:BODY:HATCHBACK/LIFTGATE

This Preliminary information communicates a customer may complain that when they open the liftgate it opens fully and then reverses to the closed position. The dealer technician is directed program the K194 Rear Gate Module.

CHEVROLET — BLAZER (2024) — 2 vehicle combinations

110000 ELECTRICAL SYSTEM

This PI states a vehicle may be encountered with a wind noise. The dealer is directed to reprogram the K9 Body Control Module with the latest calibrations available.