Service bulletins for the 2020 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.
2120 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
By topic
| 070842006Q | 2022-01-03. Service bulletin. ELECTRICAL SYSTEM:BODY CONTROL MODULE/BCM. 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. |
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| 030310007K | 2022-01-03. Service bulletin. TIRES; WHEELS. This service bulletin provides information for dealers/technicians on Tire/Wheel Characteristics (Vibration, Balance, Shake, Flat Spotting) of GM Original Equipment Tires. |
| 030091001H | 2022-01-03. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY:VEHICLE CONTROLS:STEERING. 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. |
| 21NA272 | 2021-12-27. Service bulletin. EQUIPMENT; ENGINE; ENGINE AND ENGINE COOLING. This service bulletin provides information on Engine Oil Consumption Guidelines. |
| 21NA271 | 2021-12-27. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM; EQUIPMENT. TGhis bulletin advises the technician of a possible coolant hose that might be kinked causing the customers concern. |
| 21NA270 | 2021-12-27. Service bulletin. SUSPENSION; TIRES. This informational bulletin provides information for dealers/technicians on Vibration Caused by Tires. |
| 21NA267 | 2021-12-27. Service bulletin. ENGINE; ENGINE AND ENGINE COOLING; EQUIPMENT. This bulletin advises the technician of a possible location that a leak may occur from the SCT pipe. |
| 21NA265 | 2021-12-27. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT; ELECTRICAL SYSTEM. This technical bulletin provides a procedure to re-route the coolant hose away from the front prop shaft to avoid contact. |
| 21NA257 | 2021-12-27. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. This service bulletin provides a service procedure to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated - DTC P3075 Set. |
| 21NA247 | 2021-12-27. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM:INSTRUMENT PANEL:FUEL GAUGE:FUEL LEVEL FLOAT/SENSOR/SENDING UNIT. This technical bulletin provides a procedure This technical bulletin provides repair information to correct a customer concern of Unable to Set PIN to Enable Teen Driver Feature. |
| 21NA238 | 2021-12-27. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; POWER TRAIN. This technical bulletin provides a procedure to inspect the front pump of the transmission for a possible leak. |
| 21NA237 | 2021-12-27. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS. THis technical bulletin provides a procedure to perform a cooling system flush to remove possible debris from the cooling system pipes. |
| 21NA149 | 2021-12-27. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE; ELECTRICAL SYSTEM:WIRING. This technical bulletin provides repair information to correct a customer concern of Engine Wire Harness Chafing. |
| 21NA091 | 2021-12-27. Service bulletin. BACK OVER PREVENTION; EQUIPMENT. This service bulletin provides information for customers/dealers/technicians on Normal Rearview Camera Display Operation - Flashing Diamond - Spot - or UFO like image on Rear View Camera Display. |
| 20NA188 | 2021-12-27. Service bulletin. BACK OVER PREVENTION; ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. This technical bulletin provides repair information to correct a customer concern of Rear View Camera Image Flickers When Brake Lamps or Turn Signals are On. |
| 19NA104 | 2021-12-27. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. This service bulletin provides information for dealers/technicians and customers on steam/vapor coming from the front grille or radiator area. |
| 20NA132 | 2021-12-20. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. This warranty administration bulletin provides policy information on the requirements for battery testing and warranty replacements. |
| 20NA110 | 2021-12-20. Service bulletin. FUEL SYSTEM, GASOLINE. This service bulletin advises the technician on what to do if the DEF pump has been replaced and perform a leak test to prime the pump. |
| 20NA078 | 2021-12-20. Service bulletin. SUSPENSION. This technical bulletin provides a procedure to replace the 4 5 6 clutch housing if the bushing was found worn and the cause of the customers concern. |
| 20NA020 | 2021-12-20. Service bulletin. SERVICE BRAKES, HYDRAULIC. This technical bulleti provides a procedure to replace the front and rear brake pads if the brakes are squealing. |
| 19NA129 | 2021-12-20. Service bulletin. BACK OVER PREVENTION. This technical bulletin provides repair information to correct a customer concern of a squeak and/or clunking noise coming from the rear of the vehicle. |
| 18NA073 | 2021-12-20. Service bulletin. ENGINE. 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. |
| PIT5868 | 2021-12-13. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. 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. |
| PIP5762B | 2021-12-13. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING:ENGINE:DIESEL; EQUIPMENT. This preliminary information communicates to technicians a possible valve cover causing oil consusmption, and the repair. |
| PIP5646D | 2021-12-13. Service bulletin. WHEELS; ELECTRICAL SYSTEM; POWER TRAIN. This Preliminary information communicates to the dealer technician that some customers may comment the rear wheels locked up at low speeds after a hot soak. Technicians may find DTC's P2724, P2727 or P2729 set. Technician's are advised to replace the TCM to address this concern. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.