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
| PIP5724 | 2020-05-11. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates The vehicle may have an SES lamp with any of the following DTC P06DA, P06DB, P06DC, P250A, P0300, P0340, P0341, P0335, P0336, P0641, P0011, P0010, P2088, P2089, and/or P2230. Possible crank no start or a stall. Possible wiring jumper harness pintched between the X154 connector bracket and the front engine cover on lower left side of the engine. |
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| PIP5670E | 2020-05-11. Service bulletin. ENGINE AND ENGINE COOLING. This preliminary information communicates the part restriction for the diesel turbocharger and EGR components. Updated to provide instruction on gathering additional data. |
| PIP5667C | 2020-05-11. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates the part restriction for the diesel engine air delivery and exhaust system components |
| PIP5719A | 2020-05-11. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates the possibility of dtc P12A6 with the possibility of a crank no start or extended crank concern. |
| PIT5742 | 2020-05-11. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates an issue with the engine wiring harness shorting on the ecm mounting bracket and provides repair instructions. |
| PIT5735A | 2020-05-11. Service bulletin. ELECTRICAL SYSTEM; SERVICE BRAKES. This Preliminary information communicates an issue with a SES MIL and the Brake System Control Module setting false DTC's during shut down. GM Engineering released updated cals for the BSCM to repair the issue. |
| PIT4322K | 2020-05-11. Service bulletin. ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC). This Preliminary Information communication provides information to the technician about vehicles that have an unwanted Stability Activation and/or a Service Stability message on the Driver Information Center. Technician may find a Diagnostic Trouble Code C0710. Technician should inspect for vehicles modifications before any in-depth diagnostics are performed. |
| PIE0562 | 2020-05-04. Service bulletin. TRAILER HITCHES. This engineering information (EI) is requesting information from technicians to perform the checklist provided and contact the engineer listed in regards to a Check Trailer Message on Drivers Information Center (DIC) and/or F74, F82 Fuses Blown. |
| PIE0560 | 2020-05-04. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards on a Service 4WD message being visible the driver information center (DIC). |
| PIE0556 | 2020-05-04. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the transmission. |
| PIE0546A | 2020-05-04. Service bulletin. ELECTRICAL SYSTEM. This engineering information (EI) 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. |
| PIE0538B | 2020-05-04. Service bulletin. POWER TRAIN. This engineering information (EI) ends the need for information from the field regarding 8 speed transmission shift quality. |
| 990089019S | 2020-04-27. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This warranty administration bulletin provides information on Global Warranty Management (GWM) Warranty Parts Center (WPC) Parts Return Program Information. |
| 140604004F | 2020-04-27. Service bulletin. ENGINE AND ENGINE COOLING. This informational bulletin explains the normal noises an engine may make when the ambient temperature outside is cold or the vehicle has sat for a few hours. |
| 100089005I | 2020-04-27. Service bulletin. EQUIPMENT:ELECTRICAL. This warranty administration bulletin explains to the technician that when using wiring repair labor operations, additional information may be needed when submitting Global Warranty transactions when doing wiring repairs. |
| 070089037O | 2020-04-27. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This warranty administration bulletin provides policy information for courtesy transportation and roadside assistance programs. |
| 060089029P | 2020-04-27. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This informational bulletin provides information on interior cleaning products and what is offered to clean the interiors of GM vehicles. |
| 060089026P | 2020-04-27. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This warranty administration bulletin provides information on Warranty Administration ? Customer Concern Not Duplicated (CCND) Labor Operation Numbers. |
| 050310020G | 2020-04-27. Service bulletin. TIRES. This informational bulletin provides information for dealers/technicians on Use of Nitrogen Gas in Tires. |
| 020089002S | 2020-04-27. Service bulletin. EQUIPMENT. This informational bulletin provides information for dealers/technicians on When and How to Submit a Field Product Report (FPR) (U.S. Dealers Only). |
| 20NA076 | 2020-04-27. Service bulletin. FUEL SYSTEM, GASOLINE; ENGINE. This informational bulletin advises the technician on where to located the fuel injector identification number. |
| 20NA040 | 2020-04-27. Service bulletin. LATCHES/LOCKS/LINKAGES:TAILGATE:LATCH; ELECTRICAL SYSTEM. This technical bulletin provides repair information to correct a customer concern of the pickup box power endgate may not open on initial press, or may not open at all. |
| 20NA035 | 2020-04-27. Service bulletin. STRUCTURE:BODY:HOOD. This technical bulletin provides repair information to correct a customer concern of hearing a wind whistle noise from front of vehicle while driving. |
| 20NA019 | 2020-04-27. Service bulletin. POWER TRAIN. This technical bulletin provides a procedure to replace the transmission shifter control if found the cause of the condition. |
| 20NA012 | 2020-04-27. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM:SOFTWARE. This Technical bulletin provides service procedure information for dealers/technicians on Radio Software Version V135116 Over-the-Air Update. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.