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Service bulletins for the 2020 GMC Sierra

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

1990 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

Bulletins, newest first
PIP5504E2020-08-10. Service bulletin. POWER TRAIN. This Preliminary Information communication provides information and definitions to the technician about vehicles that have fishbite, chuggle, misfire, AFM disturbances or torque converter shudder/vibration concerns. Technician are advised to use PICO software to determine root cause of the concern. If torque converter shudder is confirmed technicians are referred to Torque Converter Diagnosis in SI.
PIT5509G2020-08-10. Service bulletin. ELECTRICAL SYSTEM. This Preliminary Information communication provides information to the technician on how to diagnose and repair vehicle that may have a "Check Trailer Wiring" or "Service Trailer Brake System? message on the Driver Information Center when a trailer is connected to the vehicle. Diagnostic Trouble Code C1114 set in the Chassis Control Module. Chassis Control Module has to determine the type of trailer brake system that is being used. The Chassis Control Module can be sensitive to a variety of trailer wiring issues. The technician will need to make a trailer tester using Electric Trailer Brake Magnets and 7-way trailer connector to determine if it is a vehicle or trailer issue. If the concern is not duplicated with the tester installed, the vehicle is operating correctly and the focus should be on the trailer wiring or 7 way connector.
PIP57422020-08-10. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates to the dealer technicians that a belt chirp or rubbing noise may be caused by the harmonic balancer out ring moving backward on the pulley and contacting the front cover.
PIT5689B2020-08-10. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates that some customers may comment that after an auto-stop event the engine does not restart and to inspect the engine ground strap. Temporarly on hold while PIE0572 is active. Will review for deletion or update when PIE0572 ends.
PIT57542020-08-10. Service bulletin. EQUIPMENT. This Preliminary information communicates information on radio software anamolies and future radio software updates to correct the concern.
PIP57352020-08-10. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates to dealer technicians normal operating characteristics of the turbocharger exhaust brake.
PIT5674A2020-08-10. Service bulletin. SERVICE BRAKES; EQUIPMENT. This Preliminary information communicates that after installation of GM Accessory Performance Brake Pads it may be noticed the EBCM has set DTC(s) C116C 05 and/or C116B 05. There will be NO warning lights or messages displayed on the IPC/DIC. The GM Accessory Performance Brake Pads do not utilize the brake pad wear sensor. None. These DTC(s) do not cause any warning lights or messages to be displayed in the IPC/DIC. Per the GM Accessory Performance Brake installation instructions, the brake pad sensor connector should be capped with the supplied cap and the brake pad life system disabled in the DIC.
PIP57372020-08-10. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION:PIPES, HOSES, AND FITTINGS. This Preliminary information communicates additional diagnostic tips when diagnosing engine oil leaks on these vehicles.
PIT57522020-08-10. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. This Preliminary information communicates multiple vehicle issues caused by an aftermarket device and it gives dealership information where to inspect for this device.
PIT57512020-08-10. Service bulletin. EQUIPMENT; ENGINE; ELECTRICAL SYSTEM:WIRING. This Preliminary information communicates and issue with the SES MIL on setting DTC's P0201/P0202/P0203/P0204/P0205/P0206/P0216 and instructing dealership to inspect the engine wiring harness for damage.
PIP57332020-08-10. Service bulletin. ENGINE. This Preliminary information communicates Possible Crank no start or extended crank with DTC p12A6 set current or history. Under Investigation
PIT57502020-08-10. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM:WIRING. This Preliminary information communicates an issue with the battery goes dead and provides diagnostics tips on inspecting the LIN bus.
PIP5175D2020-08-10. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:INTERNAL:GEARS; ENGINE AND ENGINE COOLING. This Preliminary Information communication provides information to the technician about vehicles that may have a delayed engagement into drive, shudder at a launch, or the transmission is slipping when shifting into 1st, 2nd, 3rd or 4th gears. This may be due to loose stator support to pump cover bolts causing a leak at the stator support to pump cover gasket. Technician will check for the bolts to be loose. If any of the bolts are loose or the gasket is misaligned or leaking, the transmission pump cover must be replaced and the 1234 clutch plates should be inspected for being distressed and repaired as needed.
PIT57472020-08-10. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:RECREATIONAL VEHICLE/TRAILER. This Preliminary information communicates to dealership how to test properly trailer light option on the truck and also provide additional information on trailer issues.
PIT57492020-08-10. Service bulletin. STRUCTURE:BODY:DOOR; LATCHES/LOCKS/LINKAGES:DOORS:LATCH. This Preliminary information communicates an issue with the rear door lock rod sticking in the door panel bezel and provides direction on repairing the issue.
PIT57452020-08-10. Service bulletin. ELECTRICAL SYSTEM; SEATS. This Preliminary information communicates and issue with the memory seat module waking up the low speed GM lan bus and causing a battery draw.
PIP5728B2020-08-10. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This Preliminary information communicates to the dealer an issue where a module configuration function is missing from GDS2 scan tool. Dealer is instructed to manually build the vehicle in GDS2 and perform the function until software update is available.
PIE05722020-08-10. Service bulletin. EQUIPMENT. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to a on a no restart after auto-stop event and/or, no crank.
PIE0568C2020-08-10. Service bulletin. EQUIPMENT. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the conditions that are listed in this PIE.
990089019T2020-08-10. Service bulletin. EQUIPMENT. This warranty administration bulletin provides information on Global Warranty Management (GWM) Warranty Parts Center (WPC) Parts Return Program Information.
110089005O2020-08-10. Service bulletin. EQUIPMENT. This Warranty Administration bulletin provides information on Dealer Empowerment for Goodwill, Customer Enthusiasm and Policy (U.S. Only).
20NA1382020-08-10. Service bulletin. POWER TRAIN. This bulletin provides information on Policies Applicable to All U.S. Dealers for Engine and Transmission Assembly Replacement Under Warranty, Policy or Customer Enthusiasm and information on Submission of Warranty Transaction in Global Warranty Management.
20NA1322020-08-10. Service bulletin. ELECTRICAL SYSTEM. This warranty administration bulletin provides policy information on the requirements for battery testing and warranty replacements.
20NA1102020-08-10. Service bulletin. FUEL SYSTEM, GASOLINE. This informational bulletin advises the technician on what to do if the DEF pump has been replaced and perform a leak test to prime the pump.
20NA1052020-08-10. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM:ADAS:DRIVER MONITORING:CAMERA/SENSOR; STRUCTURE:BODY:TAILGATE. This technical bulletin provides repair information to correct a customer concern of 360 Camera Views go Blank with Tailgate Removed.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.