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Service bulletins for the 2021 Chevrolet Silverado

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.

1747 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
22-NA-1502024-01-13. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; FUEL SYSTEM, DIESEL. This technical bulletin provides a procedure to program the Reductant Control Module and Setup and Perform the Reductant Fluid Tank Level Reset.
19-NA-2182024-01-13. Service bulletin. ENGINE AND ENGINE COOLING. This service bulletin provides a service procedure to correct a condition of a Ticking Noise from the Engine.
21-NA-1492023-12-19. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN; ENGINE AND ENGINE COOLING. This service bulletin provides repair information for Engine Wire Harness Chafing to correct customer concerns of IPC Gauges Sweep, IPC Warning Message, SES/Check Engine/MIL, No Start/ No Crank, Runs Rough, Stalls, Reduced Engine Power, Various DTCs.
PIP5935A2023-12-18. Service bulletin. ENGINE AND ENGINE COOLING. Communicates the need for restriction on 2019 through 2023 6.6L L5D engines
23-NA-2142023-12-15. Service bulletin. ENGINE AND ENGINE COOLING. This informational bulletin provides Information on Purge Pump Part Replacement and Purge Part Number Interchange.
20-NA-1322023-12-15. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT; ELECTRICAL SYSTEM. This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements.
23-NA-2122023-12-09. Service bulletin. ENGINE AND ENGINE COOLING. This service bulletin provides information on the use of the Engine Oil Life Monitor on L5D Diesel Engines.
21-NA-1352023-11-29. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT; EXTERIOR LIGHTING; ELECTRICAL SYSTEM. This service bulletin provides information to inform dealership personnel about Law Enforcement and Government vehicles that request to disable or enable content.
22-NA-2102023-11-22. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. This technical bulletin provides a procedure to locate and repair a broken ground stud at the NOx converter.
03-00-91-001I2023-11-22. Service bulletin. WHEELS; POWER TRAIN; STEERING; SUSPENSION; ENGINE AND ENGINE COOLING. This service bulletin provides a vibration analysis worksheet the technician can use in conjunction with the appropriate Vibration Analysis-Road testing procedure when diagnosing vibration concerns.
21-NA-2282023-11-20. Service bulletin. ELECTRICAL SYSTEM:BODY CONTROL MODULE/BCM; ELECTRICAL SYSTEM; EQUIPMENT; ENGINE AND ENGINE COOLING. This bulletin provides a procedure to program the BCM to correct the customers concern of RKE idle Time-out.
21-NA-2282023-11-15. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; ENGINE AND ENGINE COOLING. This bulletin provides a procedure to program the BCM to correct the customers concern of RKE idle Time-out.
19-NA-2182023-11-15. Service bulletin. ENGINE AND ENGINE COOLING. This service bulletin provides a service procedure to correct a condition of a Ticking Noise from the Engine.
01-06-01-011O2023-10-25. Service bulletin. ENGINE AND ENGINE COOLING. This service bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
22-NA-1502023-10-18. Service bulletin. ENGINE AND ENGINE COOLING; FUEL SYSTEM, DIESEL; ELECTRICAL SYSTEM; EQUIPMENT. This technical bulletin provides a procedure to program the Reductant Control Module and Setup and Perform the Reductant Fluid Tank Level Reset.
23-NA-1702023-10-17. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin advises the tech to inspect deeper into what may be to main cause of an engine failure.
23-NA-0732023-10-16. Service bulletin. ENGINE AND ENGINE COOLING. This technical bulletin provides repair information to correct a customer concern of Evaporative DTCs P0442, P0446, P0455 or P0449, Caused by Dust Intrusion into the Evaporative Canister.
22-NA-0152023-10-14. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING. This informational bulletin provides graphs to help identify possible issues that may cause shaking and shudders and what may be the cause of said issue.
23-NA-1502023-10-06. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. This technical bulletin provides repair information to correct a customer concern of Teen Driver Feature Not Limiting Speed Correctly.
19-NA-2182023-09-29. Service bulletin. ENGINE AND ENGINE COOLING. This service bulletin provides a service procedure to correct a condition of a Ticking Noise from the Engine.
17-NA-1572023-09-26. Service bulletin. ENGINE AND ENGINE COOLING. This service bulletin explains the difference in oil filters for gas engines with new oil pump control systems and the possibilities of what may happen using the incorrect filter.
23-NA-1532023-09-26. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN. The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the customer that it is normal for the delay.
PIP5628G2023-09-18. Service bulletin. ENGINE. 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
18-NA-0732023-09-15. Service bulletin. ENGINE AND ENGINE COOLING. This service bulletin provides graphics, information and guidelines for engine component wear to assist service personnel as a guideline to perform necessary engine repairs and prevent unnecessary engine replacement.
20-NA-1162023-09-13. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN. This informational bulletin provides information on Available Top Speed Changes and how to reach them.

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