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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

Only bulletins with component: Transmission and driveline are shown. Show all

Bulletins, newest first
N2223765902022-08-02. Service bulletin. POWER TRAIN:MANUAL TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM; EQUIPMENT; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Service Update - certain vehicles may have a transmission control module that may not have been correctly programmed. Dealers are to reprogram the transmission control module.
PIP57052022-07-25. Service bulletin. POWER TRAIN; STRUCTURE; AIR BAGS; SUSPENSION. This Preliminary information communicates A vehicle may have a concern of a vibration or drone around 40 MPH and 1200 RPM under a light load. Debris in the tranmission mount. Inspect the transmission mount for debris. If debris is found, clean the mount, reinstall and evaluate for the concern.
20-NA-1422022-07-01. Service bulletin. POWER TRAIN. This Technical bulletin provides a repair to correct a condition of Shudder/Surging While Driving.
22NA0222022-06-21. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:SEALS/GASKETS. This Informational bulletin advises the technician of a possible oil leak at the front cover and how to diagnose it to verify if it is coming from the seal or not.
21NA2382022-06-21. Service bulletin. POWER TRAIN; FUEL SYSTEM, GASOLINE. This technical bulletin provides a procedure to inspect the front pump of the transmission for a possible leak.
21NA2142022-06-21. Service bulletin. POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION. This technical bulletin provides repair information to correct a customer concern of Service Engine Soon Lamp being illuminated. They may also comment on multiple transmission issues including harsh or delayed shifts, slip, surge, shudder, noise, whine, growl, shake and/or vibration. As well as the exhaust brake not working or that they do not feel it. Technicians may find DTCs P2002, P2463, P2459, P144E, P0421, P0422, P0106 P20EE, P129F, P16F3, P20FF, P226D, P249D, P249E, P11CC and / or P11D5.
21NA2142022-06-21. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; EQUIPMENT; ENGINE AND ENGINE COOLING. This technical bulletin provides repair information to correct a customer concern of Service Engine Soon Lamp Illuminated, Harsh or Delayed Transmission Shifts Including Slip, Surge, Shudder, Noise, Whine, Growl, Shake and/or Vibration, DTCs P2002, P2463, P2459, P144E, P0421, P0422, P0106 and/or P20EE Set Current or in Recent History.
PIE06762022-06-13. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to Engine Coolant Reservoir Being Overfilled with Discolored Coolant, Shudder, Shake, Vibration, Harsh Shift, Delayed Shift and/or Slipping Transmission Performance.
PIE0665A2022-06-10. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ELECTRICAL SYSTEM; POWER TRAIN. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to Service Engine Soon (SES) Lamp illuminated and/or “Service Emissions System” message on the Driver Information Center (DIC).
21-NA-2752022-06-04. Service bulletin. POWER TRAIN. This service bulletin provides repair information to correct customer concerns of Rear Wheel Lock Up, ABS Event, Loud Bang and a Flashing “D” on Driver Information Center (DIC) when Lightly or Moderately Accelerating Forcing an 8-7 or 8-6 Downshift.
20-NA-1422022-06-02. Service bulletin. POWER TRAIN. This Technical bulletin provides a repair to correct a condition of Shudder/Surging While Driving.
2-NA-0662022-05-31. Service bulletin. POWER TRAIN. The technical bulletin provides a procedure to lube the yoke and caps if found the cause of the noise from the propshaft area.
16NA3612022-05-31. Service bulletin. AIR BAGS; POWER TRAIN. This service bulletin provides service /diagnostic information to aid with a Transmission Harsh 1-2 Shift Upon First Start Up/Shift of the Day Under Light Throttle.
PIP5794B2022-05-16. Service bulletin. POWER TRAIN. This Preliminary information communicates diagnostics to the dealer involving a vehicle shudder concern caused by the camshaft actuator system that can be mistaken for a transmission issue.
16-NA-0192022-05-10. Service bulletin. POWER TRAIN. This service bulletin provides information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flares.
20-NA-0502022-05-06. Service bulletin. POWER TRAIN. This technical bulletin provides a procedure to clear the codes and test the Tcase if found that the customer has tried to shift the t-case from 4lo to Hi gears while driving.
N212354170-022022-04-26. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:DIESEL. Emission Recall - General Motors has decided to conduct a Voluntary Emissions Recall to improve the operation of the regeneration cycle on certain 2020 Chevrolet Silverado and GMC Sierra vehicles with a 6.6L diesel engine. The recall will address that currently under certain operating conditions, higher than necessary temperatures may be used to clean the Diesel Particulate Filter (DPF) during the regeneration cycle. Dealers are to reprogram the Engine Control Module (ECM) and Transmission Control Module (TCM).
PIP5706A2022-04-18. Service bulletin. POWER TRAIN. This Preliminary information communicates to the dealer a condition with the throttle body that may illuminate the service engine soon light, cause the engine to run rough and/or display reduced engine power message. Dealers are instructed to replace the throttle body assembly and install a grounding wire from the throttle body to the valve cover to prevent future failures.
21-NA-2142022-04-06. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN. This technical bulletin provides repair information to correct a customer concern of Service Engine Soon Lamp being illuminated with DTCs P2002, P2463, P2459, P144E, P0421, P0422, P0106 P20EE, P129F, P16F3, P20FF, P226D, P249D, P249E, P11CC and / or P11D5. They may also comment on multiple transmission issues including harsh or delayed shifts, slip, surge, shudder, noise, whine, growl, shake and/or vibration.
PIE0676A2022-04-06. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING. This engineering information (EI) closure ends the need for further information from the field in regards to Engine Coolant Reservoir Being Overfilled with Discolored Coolant, Shudder, Shake, Vibration, Harsh Shift, Delayed Shift and/or Slipping Transmission Performance.
22-NA-0662022-04-06. Service bulletin. POWER TRAIN. The technical bulletin provides a procedure to lube the yoke and caps if found the cause of the noise from the propshaft area.
22-NA-0152022-04-05. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN. This informational bulletin provides graphs to help identify possible issues that may cause shaking and shudders and what may be the cause of said issue.
20-NA-2092022-04-05. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. This technical bulletin provides repair information to correct a customer concern of Service 4WD Message illuminated on Driver Information Center (DIC), DTCs C118D, C119B and/or C119C set.
21-NA-0952022-03-18. Service bulletin. POWER TRAIN. This technical bulletin provides a procedure to seal the exhaust at the UFSCR and Tailpipe flange.
20-NA-2072022-03-16. Service bulletin. PARKING BRAKE:ELECTRICAL:CONTROL MODULE; ELECTRICAL SYSTEM; POWER TRAIN. This service bulletin informs the technician to inspect for a possible electrical concern at the ECM X2 electrical connector to correct a customer concern of Malfunction Indicator Lamp (MIL) Illuminated - DTC P0333 Set.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.