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
| PIT5921A | 2023-03-13. Service bulletin. BACK OVER PREVENTION. This Preliminary information communicates diagnostics aids for rear view camera issues that may be encountered. |
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| PIP5711C | 2023-03-13. 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. |
| PIT5954A | 2023-03-13. Service bulletin. BACK OVER PREVENTION; EQUIPMENT:ELECTRICAL. This Preliminary information communicates an engineering investigation for OnStar LED Red And Wifi Hotspot Inoperative After Remote Vehicle Start concern. |
| 21-NA-149 | 2023-03-08. 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. |
| 16-NA-130 | 2023-03-08. Service bulletin. POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:VALVES/VALVE BODY. This service bulletin provides information for after installation of a replacement upper valve body, the transmission may have no Reverse and no 2nd gear. |
| 15-NA-017 | 2023-03-04. Service bulletin. EQUIPMENT. This Warranty Administration bulletin provides policy information on Causal Part requirements for transactions submitted to GM for payment. |
| 22-NA-150 | 2023-03-04. 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. |
| 18-NA-146 | 2023-03-03. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This warranty administration bulletin provides policy information, proper labor operation selection and causal part identification for warranty transactions (U.S. Only). |
| 17-NA-073 | 2023-03-03. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This warranty administration bulletin provides information regarding the field action courtesy transportation policy. |
| PI0754F | 2023-03-03. Service bulletin. VISIBILITY:GLASS, SIDE/REAR:CRITICAL FASTENERS; UNKNOWN OR OTHER; STRUCTURE. This PI provides information on Rear and Side Tempered Glass Spots (Quench Marks) and that they are a normal characteristic. |
| 99-04-20-002N | 2023-03-03. Service bulletin. POWER TRAIN. This service bulletin provides information on Driveline Clunk Noise and what is acceptable and what is considered normal operation. |
| 21-NA-067 | 2023-03-01. Service bulletin. STRUCTURE; VISIBILITY:WINDSHIELD. This technical bulletin provides repair information to correct a customer concern of the foam strip between the I/P trim and base of the windshield detaching from the upper I/P trim panel. |
| 18-NA-263 | 2023-02-28. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This warranty administration bulletin provides policy information for variable diagnostic time allowances on select labor operations (U.S. Only). |
| 07-08-42-006R | 2023-02-28. Service bulletin. EXTERIOR LIGHTING. 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. |
| 01-08-42-001O | 2023-02-28. Service bulletin. EXTERIOR LIGHTING. This service bulletin provides information for dealers/technicians on Exterior Lamp Condensation and Water Leaks and Replacement Guidelines. |
| 23-NA-011 | 2023-02-23. Service bulletin. ENGINE AND ENGINE COOLING. This Informational bulletin advises the technician of possible areas the oil may leak from the engine. |
| 19-NA-218 | 2023-02-23. Service bulletin. ENGINE AND ENGINE COOLING. This service bulletin provides a service procedure to correct a condition of a Ticking Noise from the Engine. |
| 19-NA-076 | 2023-02-23. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT; EQUIPMENT; ELECTRICAL SYSTEM. This service bulletin provides repair information to correct a customer concern of Blue or Black Screen and Service Rear Vision System Message on Radio Display Shifting into Reverse. |
| 18-NA-279 | 2023-02-23. Service bulletin. EXTERIOR LIGHTING; LATCHES/LOCKS/LINKAGES; EQUIPMENT. This service bulletin provides information for dealers/technicians on the process to disable and enable passive unlocking. |
| 22-NA-115 | 2023-02-21. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. This service bulletin provides information for U.S. dealers ONLY to refer to the Battery Maintenance Report to identify vehicles in dealer inventory that require attention. |
| PIT5689E | 2023-02-13. Service bulletin. ENGINE. 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. PIE0572 has now ended and reinstating the PI. |
| PIT5970 | 2023-02-13. Service bulletin. BACK OVER PREVENTION. This Preliminary information communicates information to the technician that if they receive a vehicle with this concern and verifying the rear view camera is zoomed in, General Motors is aware of this and working on a solution for the concern. |
| PIT5767A | 2023-02-13. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:CONDENSOR/EVAPORATOR; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This Preliminary information communicates an issue with poor a/c performance and to replace the a/c condenser. |
| PIT5868B | 2023-02-13. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This Preliminary information communicates an issues will low or poor heater performance on the drivers side. Dealers are to inspect the HVAC temperature door linkage and if ok replace the heater core. |
| PIT5386H | 2023-02-13. Service bulletin. BACK OVER PREVENTION; ELECTRICAL SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that are found to have a back-up alarm inoperative during the Pre-Delivery Inspection. On trucks equipped with the Back Up Alarm (RPO 8S3), the alarm will be intentionally left disconnected from the assembly plant. Technician will reroute the harness and plug it in. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.