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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

Bulletins, newest first
PIP5833A2022-02-14. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This Preliminary information communicates to technicians to update the program in the DEF controller
PIT5702C2022-02-14. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:FILTER/SCREEN; EQUIPMENT. This Preliminary information communication provides information to the technician on installing Regular Production Option Code 9L7 Up-fitter Auxiliary Switches. Technician will need to reference the latest version of General Motors Up-fitter Integration Bulletin 153. The information can be found at http://www.gmupfitter.com/ under the "Technical Bulletin" Tab and then "Show all bulletins."
PIT5697B2022-02-14. Service bulletin. ELECTRICAL SYSTEM; BACK OVER PREVENTION: CAMERA SYSTEM. This Preliminary information communication provides information to the technician on installing Regular Production Option Code UVC Rearview Camera. Technician will need to reference the latest version of General Motors Up-fitter Integration Bulletin 152. The information can be found at http://www.gmupfitter.com/ under the "Technical Bulletin" Tab and then "Show all bulletins."
PIP58102022-02-14. Service bulletin. ELECTRICAL SYSTEM:ADAS:BLINDSPOT:SOFTWARE. This Preliminary information communicates that the tool for the HD transfer cases to install the input seal during a repair is incorrect and a new tool is in development.
21NA2572022-02-14. Service bulletin. EXTERIOR LIGHTING; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM). This service bulletin provides a service procedure to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated - DTC P3075 Set.
21NA2562022-02-14. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM); EXTERIOR LIGHTING. This service bulletin provides repair information for dealers/technicians to correct a customer concern of a Malfunction Indicator Lamp Illuminated with DTC P26BB Set.
21NA2372022-02-14. Service bulletin. UNKNOWN OR OTHER; ENGINE AND ENGINE COOLING:COOLING SYSTEM. THis technical bulletin provides a procedure to perform a cooling system flush to remove possible debris from the cooling system pipes.
N192282860 012022-02-07. Service bulletin. POWER TRAIN. Service Update. Certain vehicles may have a condition where the transmission enters a neutral state when the internal range sensor (IRS) fault is active. Dealers are to reprogram the transmission control module.
N1922850712022-02-07. Service bulletin. EQUIPMENT. Customer Satisfaction Program. As part of equipment recall N192285070, GM instructed dealers to remove recalled tri-fold tonneau covers on certain vehicles prior to delivery to the customer. GM is conducting this customer satisfaction field action to provide these customers with the improved tonneau cover system for their vehicle. Dealers will replace the tonneau rails and clamps and add a tether to prevent the tonneau from detaching onto the roadway even if improperly installed. If the vehicle was covered by equipment recall 19E031 (N192217500), the dealer will also confirm that the repair for equipment recall 19E031 (N192217500) was correctly performed.
N212342980-012022-02-04. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; ELECTRICAL SYSTEM:SOFTWARE; FUEL SYSTEM, DIESEL. Service Update. On certain vehicles equipped with a 6.6L diesel engine (RPO L5P), the DEF tank connector may overheat and set the following diagnostic codes (P10D9, P143C and P10F3), which will result in reduced engine speed. Dealers are to reprogram the reductant control module.
N2123429802022-01-27. Service bulletin. ELECTRICAL SYSTEM; FUEL SYSTEM, DIESEL. On certain vehicles equipped with a 6.6L diesel engine (RPO L5P), the DEF tank connector may overheat and set the following diagnostic codes (P10D9, P143C and P10F3), which will result in reduced engine speed. Dealers are to reprogram the reductant control module.
PIP58322022-01-24. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. This Preliminary information communicates to the dealer an issue where a vehicle may be exhibiting an engine noise condiion. The dealer is instructed on how to isolate the noise to a specific area of the engine for further diagnosis.
PIP5628E2022-01-24. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308 and/or P050D
PIP5735A2022-01-24. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. This Preliminary information communicates to dealer technicians normal operating characteristics of the turbocharger exhaust brake.
PIT5828A2022-01-24. Service bulletin. ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL. This Preliminary Information communication provides information to the technician about customers that may request the factory Integrated Trailer Brake Controller Regular Production Option Code (JL1) be installed on their Full-Size Pickup or SUV when the vehicle was not ordered with the option. Dealer should advise the customer it cannot be added to the vehicle.
070842006Q2022-01-03. 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.
030310007K2022-01-03. 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.
030091001H2022-01-03. 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.
21NA2722021-12-27. Service bulletin. EQUIPMENT; ENGINE; ENGINE AND ENGINE COOLING. This service bulletin provides information on Engine Oil Consumption Guidelines.
21NA2712021-12-27. 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.
21NA2672021-12-27. 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.
21NA2652021-12-27. 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.
21NA2572021-12-27. 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.
21NA2472021-12-27. 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.
21NA2382021-12-27. 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.

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