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
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Only bulletins with component: Fuel system are shown. Show all
| 20NA110 | 2021-03-01. Service bulletin. FUEL SYSTEM, DIESEL; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT. This informational bulletin advises the technician on what to do if the DEF pump has been replaced and perform a leak test to prime the pump. |
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| 18NA285 | 2021-03-01. Service bulletin. EQUIPMENT; FUEL SYSTEM, OTHER:KINETIC:CLUTCH. This informational bulletin advises the tech of a possible normal condition when the vehicle creeps forward during start up conditions when the clutch packs are full of residual oil. |
| 030604017O | 2020-12-21. Service bulletin. FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING:ENGINE:DIESEL. This Informational Bulletin provides information on availability of Diesel Fuel additives. |
| 20NA197 | 2020-12-21. Service bulletin. EQUIPMENT; FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:FUEL RAIL. This technical bulletin provides a procedure to inspect and repair the fuel pressure sensor if found the cause of the customers concern. |
| PIT5161H | 2020-12-14. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; FUEL SYSTEM, GASOLINE; EQUIPMENT. This Preliminary Information communication provides information to the technician about vehicles that may have a bump feel or clunk noise at a stop or on launch. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle. The bump clunk issue may be due to fuel movement in the fuel tank when not completely full. The condition is eliminated after completely filling the fuel tank. |
| 050604022R | 2020-12-07. Service bulletin. FUEL SYSTEM, DIESEL. This bulletin provides information on the TOP TIER Detergent Gasoline Licensed Brands and the TOP TIER Diesel Fuel Licensed Brands that are recommended for use in all GM vehicles and the TOP TIER FUELS website URL. |
| 19NA237 | 2020-11-30. Service bulletin. FUEL SYSTEM, DIESEL; EQUIPMENT. This informational bulletin explains how to identify possible DEF contamination. |
| 20NA110 | 2020-11-30. Service bulletin. FUEL SYSTEM, DIESEL; FUEL SYSTEM, DIESEL:DELIVERY:FUEL PUMP. This informational bulletin advises the technician on what to do if the DEF pump has been replaced and perform a leak test to prime the pump. |
| 18NA361 | 2020-11-30. Service bulletin. FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING:ENGINE:DIESEL. This technical bulletin provides a procedure to flush the cooler lines to validate if there is excessive debris in the fuel system caused by a failed part. |
| 18NA150 | 2020-11-30. Service bulletin. ENGINE AND ENGINE COOLING; FUEL SYSTEM, OTHER. This informational bulletin provides information on 6.6L Duramax Possible Oil Leak Path Information. |
| 18NA103 | 2020-11-30. Service bulletin. FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING:COOLING SYSTEM:PUMP. This service bulletin provides information to correct a customer concern of an in-tank fuel pump whining noise, engine hard to start and/or stalls and Malfunction Indicator Lamp (MIL) is illuminated. |
| 16NA376 | 2020-11-30. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; FUEL SYSTEM, DIESEL. This informational bulletin provides information on higher than expected oil consumption. |
| 16NA372 | 2020-11-30. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING:ENGINE:DIESEL; FUEL SYSTEM, DIESEL. This bulletin provides information on common diesel engine tick noises and how they are considered part of normal operation and no parts should be replaced for these normal operating conditions. |
| 16NA244 | 2020-11-30. Service bulletin. EQUIPMENT; FUEL SYSTEM, DIESEL. This informational bulletin provides information on Diesel Exhaust Fluid (DEF) and the proper use of the DEF system. |
| PIE0574A | 2020-10-26. Service bulletin. FUEL SYSTEM, OTHER; ENGINE. This engineering informational bulletin is requesting information from technicians to inspect for engine oil leak and contact the engineer listed. |
| 20NA197 | 2020-10-26. Service bulletin. EQUIPMENT; FUEL SYSTEM, GASOLINE:STORAGE:EVAPORATIVE EMISSIONS:HOSES/VALVES/SENSORS. This technical bulletin provides a procedure to inspect and repair the fuel pressure sensor if found the cause of the customers concern. |
| 18NA361 | 2020-10-26. Service bulletin. FUEL SYSTEM, GASOLINE. This technical bulletin provides a procedure to flush the cooler lines to validate if there is excessive debris in the fuel system caused by a failed part. |
| N202304080 | 2020-10-26. Service bulletin. FUEL SYSTEM, GASOLINE. Customer Satisfaction Program. Certain vehicles may not have one of the fill pipe parts kit which should be included with the vehicle. Dealers are to provide the missing fill pipe parts kit to the customer. |
| PIP5669A | 2020-09-14. Service bulletin. FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING:ENGINE:DIESEL. This preliminary information communicates the end of the part restriction for the diesel engine fuel system components |
| PIP5667E | 2020-09-14. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; EQUIPMENT; FUEL SYSTEM, DIESEL. This Preliminary information communicates the part restriction for the diesel engine air delivery and exhaust system components |
| PIP5647B | 2020-09-14. Service bulletin. ELECTRICAL SYSTEM; ENGINE; FUEL SYSTEM, GASOLINE. This Preliminary information communicates A vehicle may have a concern of running poor and stalling. No trouble codes may be set referencing this condition. Fuel trims around -20% may be observed on both banks. Engine oil level will be found over full and have a fuel odor. It will be found that the Engine oil is diluted with fuel. Small gas engines (SGE) May only have the engine oil level over full and have a fuel odor. It will be found that the Engine oil is diluted with fuel. This concern is caused by marshalling the vehicle around the lot before it is sold and/or short driver cycles. |
| 20NA110 | 2020-08-10. Service bulletin. FUEL SYSTEM, GASOLINE. This informational bulletin advises the technician on what to do if the DEF pump has been replaced and perform a leak test to prime the pump. |
| N202300791 | 2020-06-29. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING:ENGINE:DIESEL. Service Update - In some vehicles, equipped with diesel engines, the Diesel Exhaust Fluid (DEF) system may not immediately reactivate, as it should, after the vehicle?s control system finds that a DEF heater fault is no longer present. In these vehicles, after such a fault is detected as absent, DEF system reactivation, including DEF injection, may not occur until the ignition key is cycled. Dealers are to reprogram the reductant control module. |
| 20NA098 | 2020-06-22. Service bulletin. ENGINE; FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS. This informational bulletin explains to the tech on how to order a new fuel injector by matching the part number on the part and ordering it from the EPC. |
| 16NA383 | 2020-06-22. Service bulletin. ENGINE; FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY. This technical bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce carbon build-up. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.