Service bulletins for the 2018 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.
1723 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
By topic
| PIP5358C | 2023-08-21. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This Preliminary Information communication provides information to the technician about vehicles that have an unusual noise and is difficult to identify, isolate or pinpoint. Technician should get record a sound clip or take a video of the noise for assessment by engineering. Technician will need to call General Motors Technical Assistance Center for further assistance. |
|---|---|
| PIT5551K | 2023-08-21. Service bulletin. FORWARD COLLISION AVOIDANCE. This Preliminary information communicates a "Forward Collision System Reduced" message displayed on the DIC when the Forward Automatic Braking has been set to the "Alert" setting. This is normal when the FAB has been set to "Alert". |
| PIP4902R | 2023-08-21. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This Preliminary Information communication provides information to the technician that General Motors Technical Assistance Center may ask for Global Diagnostic System 2 Session Log. Technician will need use Global Diagnostic System 2 to send the session logs to General Motors Technical Assistance Center for further assistance on the vehicle in question. |
| 09-06-04-026X | 2023-08-03. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2. |
| 03-06-01-023G | 2023-08-03. Service bulletin. ENGINE AND ENGINE COOLING. This service bulletin explains how to measure for oil consumption and possible reasons for loss of oil. |
| 20-NA-142 | 2023-08-02. Service bulletin. POWER TRAIN. This Technical bulletin provides a repair to correct a condition of Shudder/Surging While Driving. |
| 99-09-40-005I | 2023-07-28. Service bulletin. SEAT BELTS. This service bulletin provides information on availability for a seat belt extender. |
| 23-NA-027 | 2023-07-26. Service bulletin. FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. This technical bulletin provides a procedure to test and replace the high-pressure fuel injector electrical connectors if found the cause of the MIL. |
| 21-NA-026 | 2023-07-25. Service bulletin. EQUIPMENT. This service bulletin provides information for dealers/technicians on accessory all-weather floor liners and flat mats warped or misshapen. |
| 17-NA-066 | 2023-07-25. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; POWER TRAIN. This service bulletin provides information for automatic transmission Oil Cooler Flush and flow test. |
| 23-NA-125 | 2023-07-25. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This service bulletin provides information for dealers/technicians on Over the Air (OTA) and In Market Enhancement (IME) FAQs. |
| 22-NA-080 | 2023-07-25. Service bulletin. ENGINE AND ENGINE COOLING. This technical bulletin provides a procedure to replace the camshaft actuator magnet to correct customer concerns of engine related shudder. |
| 07-08-42-006S | 2023-07-25. Service bulletin. EXTERIOR LIGHTING; ELECTRICAL SYSTEM. This service bulletin provides technicians with information on available BCM calibrations to restore bulb outage detection on vehicles produced by a second stage manufacturer (Upfitter), and/or turn signals flash fast after factory box removed. |
| PIT4261J | 2023-07-17. Service bulletin. TIRES:SIDEWALL. This Preliminary Information communication provides information to the technician about vehicles with tire sidewall irregularities. This is a visual condition that will not affect durability, reliability or performance of the tires. Dealer should communicate to the customer that slight sidewall indentations are a common characteristic of radial tire construction. |
| 99-08-51-001F | 2023-07-14. Service bulletin. STRUCTURE. This service bulletin provides information on Paintless Dent Repair Process. |
| 17-NA-066 | 2023-07-13. Service bulletin. POWER TRAIN. This service bulletin provides information for automatic transmission Oil Cooler Flush and flow test. |
| 13-08-116-001I | 2023-07-13. Service bulletin. ELECTRICAL SYSTEM. The intent of this service bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple customer concerns that do not have other diagnostic methods to identify them. |
| 01-06-01-011N | 2023-07-13. Service bulletin. ENGINE AND ENGINE COOLING. This service bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption. |
| 16-NA-158 | 2023-06-27. Service bulletin. EQUIPMENT. This service bulletin describes the U.S. Dealer Special Tool Loan Program process. |
| 23-NA-103 | 2023-06-21. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This service bulletin provides information on submitting quality Photos of Various Vehicle Concerns to the GM Technical Assistance Center (TAC). |
| 23-NA-061 | 2023-06-21. Service bulletin. ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. This informational bulletin advises the tech on how to check for possible exhaust leaks. |
| 17-NA-374 | 2023-06-20. Service bulletin. ENGINE AND ENGINE COOLING. This informational bulletin advises the technician of how the Soot information has changed from grams to percentage. |
| 04-07-30-013E | 2023-06-19. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING. This service bulletin provides information to dealership personnel on automatic transmission shift and engine driveability concerns and/or MIL ON due to aftermarket oil bath air filter use. |
| 02-00-89-002V | 2023-06-19. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This service bulletin provides information for dealers/technicians on When and How to Submit a Field Product Report (FPR) (U.S. Dealers Only). |
| PIT5509K | 2023-06-13. Service bulletin. AIR BAGS; ELECTRICAL SYSTEM; TRAILER HITCHES. 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. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.