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
| PIT5723 | 2020-01-21. Service bulletin. FUEL SYSTEM, GASOLINE. This Preliminary information communicates information that the EVAP purge pump may be filling with liquid fuel if the customer overfills the fuel tank by over 3 clicks of a normal filler nozzle. |
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| PIT5479C | 2020-01-21. Service bulletin. SERVICE BRAKES. This Preliminary Information communication provides information to the technician about fluid leaking from the brake caliper piston area found during a service of the vehicle. The substance is actually excess assembly grease from the caliper boot and piston installation. This grease can be cleaned off and the rest of the service completed. |
| PIP5690A | 2020-01-21. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This Preliminary information communicates to dealer technicians there is a software anomaly not allowing the air filter life to be reset. |
| PIP5688 | 2020-01-21. Service bulletin. EQUIPMENT. This Preliminary information communicates to the dealer technician to instruct the customer to use the block heater only at temperatures 0F and below. A calibration will become available at a later date. |
| PIP5668B | 2020-01-21. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates to the dealer technician the coolant control valve is no longer on restriction. |
| PIP5673A | 2020-01-21. Service bulletin. STRUCTURE. This Preliminary information communicates advises the technician that the ECM part number will be placed on a parts restriction through the General Motors Technical Assistance Center. Dealer will need to contact General Motors Technical Assistance Center for further assistance. |
| N192279350 | 2019-12-30. Service bulletin. EXTERIOR LIGHTING:FOG LIGHTS; STRUCTURE; ELECTRICAL SYSTEM. N192279350 - Service Update Bulletin. On certain vehicles, dealer installed accessory LED fog lamps were offered and sold to customers, but there was not a body control module calibration available at the time to enable the fog lamps to operate. Dealers are to reprogram the body control module. |
| N192279900 | 2019-12-30. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; STEERING. N192279900 - Service Update. On certain vehicles equipped with an active hydraulic assist gear (RPO NV8), the driver may experience a steering wheel vibration while driving typically at speeds from 50 mph (80 km) to 80 mph (130 km). Dealers are to reprogram the power steering control module. |
| N192273400 | 2019-12-30. Service bulletin. EQUIPMENT; FUEL SYSTEM, GASOLINE; ENGINE. N192273400 - Service Update. Certain LD vehicles may have a condition in which the right-hand side, positive crankcase ventilation (PCV) tube may not be fully seated (loose), allowing unrestricted blow-by gases to release to the atmosphere. Customers may experience a whistling sound, or there may be an audible air leak. Disconnection of this line is monitored through the fuel trim diagnostics, and in a worst-case scenario, the customer may experience a check engine light with DTC codes P0171 and/or P0174. Dealers are to inspect and ensure the PCV tube to the right-hand rocker is fully seated and secure. |
| PIE0548 | 2019-12-16. Service bulletin. EQUIPMENT. This engineering informational bulletin is requesting information on a issue that is caused by loose ground connection at G110 or G114 that results in a repair. |
| PIE0547 | 2019-12-16. Service bulletin. ELECTRICAL SYSTEM. This engineering informational bulletin is requesting information a issue that is caused by wire damage or an incorrect wire routing issue that results in a repair. |
| PIE0546 | 2019-12-16. Service bulletin. ELECTRICAL SYSTEM. This engineering information (EI) bulletin is requesting information from the field on conditions of Service Engine Soon (SES) Lamp Illuminated, DTCs B2B0D and/or B2B0E Central Gateway Module Codes Unable to Communicate with HSLAN or LSLAN. Eng is attempting to root cause condition and validate a field fix. |
| PIE0544A | 2019-12-16. Service bulletin. UNKNOWN OR OTHER. This engineering informational bulletin is requesting information on vehicles with the Service Engine Soon (SES) lamp being illuminated and DTC P1467 set. |
| PIE0544 | 2019-12-16. Service bulletin. ENGINE; ELECTRICAL SYSTEM. This engineering informational bulletin is requesting information on vehicles with the Service Engine Soon (SES) lamp being illuminated and DTC P1467 set. |
| PIE0536A | 2019-12-16. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ENGINE. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to oil leaking from the oil pan. |
| 100089009D | 2019-12-16. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. This informational bulletin provides information on key code security rules and information on GM keycode look-up applications. |
| 080310006G | 2019-12-16. Service bulletin. EQUIPMENT; TIRES; EQUIPMENT ADAPTIVE/MOBILITY; WHEELS. This technical bulletin provides a procedure on how to clean and resurface aluminum wheel bead seats for vehicles that have the condition of Tire Slowly Goes Flat, Tire Air Loss, Low Tire Pressure Warning Light Illuminated, Aluminum Wheel Bead Seat Corrosion. |
| 080089014F | 2019-12-16. Service bulletin. EQUIPMENT; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This informational bulletin provides information for dealers/technicians on Use of Dealer Case Management (DCM) and Being Prepared for Contacting U.S. Technical Assistance (TAC). |
| 010842001M | 2019-12-16. Service bulletin. EQUIPMENT; EXTERIOR LIGHTING; EQUIPMENT ADAPTIVE/MOBILITY. This informational bulletin provides information for dealers/technicians on Exterior Lamp Condensation and Replacement Guidelines. |
| 19NA270 | 2019-12-16. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. This technical bulletin provides repair information to correct a customer concern of Phone Ringer Volume Turned Down or Too Quiet. |
| 19NA263 | 2019-12-16. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This informational bulletin explains a normal condition for sludge to form in the oil cap when equipped with DEF system. |
| 19NA262 | 2019-12-16. Service bulletin. ELECTRICAL SYSTEM. This technical bulletin provides repair information to correct a customer concern of Clock Shows Dashes and Cannot be Set After Battery Disconnect. |
| 19NA257 | 2019-12-16. Service bulletin. STRUCTURE:FRAME AND MEMBERS. This technical bulletin provides repair information to correct a customer concern of the pickup box being out of alignment. |
| PIP5690 | 2019-12-09. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This Preliminary information communicates to dealer technicians there is a software anomaly not allowing the air filter life to be reset. |
| PIP5689 | 2019-12-09. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates to the technician to reprogram the engine control module |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.