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Service bulletins for the 2021 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.

1649 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

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Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
23-NA-0642023-05-03. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This service bulletin provides information on the Transport Mode Feature, also known as Logistics mode, which is used to increase the 12V Battery stand time of the vehicle during transit and or long period of stand time at the dealerships.
23-NA-0422023-05-03. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This service bulletin provides repair information to update radio software to correct customer concerns of Software related issues.
22-NA-1722023-05-03. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM; WHEELS. This technical bulletin provides repair information to correct a customer concern of Trailer Tire Pressure Only Reading Up To 100 PSI, New Parts To Increase To 147 PSI.
20-NA-1982023-05-03. Service bulletin. ELECTRICAL SYSTEM; EXTERIOR LIGHTING; EQUIPMENT. This technical bulletin provides repair information to correct a customer concern of seeing the trailer running lights shut off due to excessive load on the running lamp circuit.
20-NA-1322023-05-03. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements.
23-NA-0622023-04-14. Service bulletin. BACK OVER PREVENTION; ELECTRICAL SYSTEM; EQUIPMENT. This service bulletin provides repair information to correct a customer concern of Rear View Camera Coaxial Related Issues - DTCs B395A, B395B, B395C, B101E, B101D.
23-NA-0272023-04-14. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM; FUEL SYSTEM, DIESEL. This technical bulletin provides a procedure to test and replace the high-pressure fuel injector electrical connectors if found the cause of the MIL.
22-NA-1482023-04-14. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM; POWER TRAIN. This technical bulletin provides repair information to correct a customer concern of Service 4–Wheel Drive Message Illuminated in DIC with DTC C119E Set During Antilock Brake System Event.
22-NA-1472023-04-14. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. This technical bulletin provides repair information to correct a customer concern of Service 4–Wheel Drive Message Illuminated in DIC with DTC C15AC Set.
23-NA-0552023-04-14. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This service bulletin provides information on the EL-52800 Diagnostic & Charge Battery Station (DCBS) – FAQs.
23-NA-0492023-04-13. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This technical bulletin provides repair information to correct a customer concern of Volume Selection Does Not Clear from DIC After Adjusting Volume.
22-NA-1502023-04-13. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. This technical bulletin provides a procedure to program the Reductant Control Module and Setup and Perform the Reductant Fluid Tank Level Reset.
21-NA-0432023-04-13. Service bulletin. ELECTRICAL SYSTEM; FUEL SYSTEM, GASOLINE; WHEELS; ENGINE AND ENGINE COOLING. This informational bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold (prepping) to the customer.
23-NA-0422023-04-12. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This service bulletin provides repair information to update radio software to correct customer concerns of Software related issues.
21-NA-1062023-04-12. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. This service bulletin provides information for the technician that may experience a condition when after performing a DTC Clear/Reset on the TCM during diagnosis or after completion of a transmission repair or replacement, the DTCs did not clear or appear to reset on the next engine start.
21-NA-0612023-04-12. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This service bulletin provides information for dealers on Using EL-52545 When Diagnosing PEPs Transmitter Key Fobs.
23-NA-0442023-03-30. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This service bulletin provides information on AGM batteries that require less frequent charging in storage.
PIT59842023-03-13. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates a diagnostic tip for an issue where the starter stays engaged after the engine starts. Dealers are to suspect/monitor the crankshaft position sensor.
PIP5711C2023-03-13. Service bulletin. ENGINE; BACK OVER PREVENTION; ELECTRICAL SYSTEM. This Preliminary information communicates to the dealer technicians a warm engine knock noise has no short or long term effects on the engine. Do not attempt repairs for this noise.
21-NA-1492023-03-08. Service bulletin. ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR; ELECTRICAL SYSTEM. This technical bulletin provides repair information to correct a customer concern of Engine Wire Harness Chafing.
23-NA-0262023-03-04. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. This technical bulletin provides repair information to correct a customer concern of LM2 Engine Calibration Update for DTC P003A.
22-NA-1502023-03-04. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. This technical bulletin provides a procedure to program the Reductant Control Module and Setup and Perform the Reductant Fluid Tank Level Reset.
23-NA-0142023-02-23. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This technical bulletin provides repair information to correct a customer concern of Unable to Dismiss Turn By Turn Directions from the DIC.
21-NA-1322023-02-23. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. This informational bulletin provides Changes to the Automatic Stop/Start feature for Certain 2021 Escalade models, Silverado 1500, Suburban, Tahoe, Sierra 1500, Yukon models Equipped with RPO NSS.
21-NA-1062023-02-23. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. This service bulletin provides information for the technician that may experience a condition when after performing a DTC Clear/Reset on the TCM during diagnosis or after completion of a transmission repair or replacement, the DTCs did not clear or appear to reset on the next engine start.

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