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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
PIP5750A2020-11-16. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates the possibility of the having dtc p06DD P06DA P06DB due to engine wiring harness concerns.
PIT5387H2020-11-16. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This Preliminary Information communication provides information to the technician how to repair vehicles that Instrument Panel Cluster, Radio, and Heater-Vent-Air Conditioning display blanks out, Bluetooth phone or Pandora connection dropped, the radio station or volume changes when operating the snow plow. Please advise the customer that engineering is aware of this concern and working on this issue.
PIP5752E2020-11-16. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates A Vehicle may have a concern of service engine light, misfire and engine noise with possible of DTC P0300 P0106 P0506, Possible valve spring concern
PIP5752D2020-11-16. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates A Vehicle may have a concern of service engine light, misfire and engine noise with possible of DTC P0300 P0106 P0506, Possible valve spring concern
PIP57592020-11-16. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates 6.2L engine restriction, Contact TAC
PIP5748B2020-11-16. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates to the technition instructions to replace the particulate matter sensor for a P1488 and to use the special labor operation for tracking purposes.
PIP5752C2020-11-16. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates A Vehicle may have a concern of service engine light, misfire and engine noise with possible of DTC P0300 P0106 P0506, Possible valve spring concern
PIP5752B2020-11-16. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates A Vehicle may have a concern of service engine light, misfire and engine noise with possible of DTC P0300 P0106 P0506, Possible valve spring concern
PIT5734A2020-11-16. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This Preliminary information communicates an issue with poor heater performance and advises dealerships to inspect the heater core inlet and outlet hoses for being twisted or kinked.
PIT5736A2020-11-16. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This Preliminary information communicates how the HVAC setting operates during a remote vehicle start.
PIT5551F2020-11-16. Service bulletin. FORWARD COLLISION AVOIDANCE. This Preliminary information communicates a "Forward Collision System Reduced" message displayed on the DIC when the Forward Automatic Braking has been set to the "Alert" setting. This is normal when the FAB has been set to "Alert".
PIP5733E2020-11-16. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates Possible Crank no start or extended crank with DTC p12A6 set current or history. Under Investigation
PIP5670E2020-11-16. 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.
PIE05842020-10-26. Service bulletin. EXTERIOR LIGHTING; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. This engineering information (EI) is requesting information from technicians to provided the engineers listed in regards to No Trailer Lights, No Brake Lights and/or Trailer Tow Receptacle is Loose.
PIE05832020-10-26. Service bulletin. POWER TRAIN. This engineering information (EI) is requesting information from technicians to provided the engineers listed in regards to Early, Late, Harsh and/or Slip Type Transmission Performance.
PIE0578B2020-10-26. Service bulletin. EQUIPMENT; ENGINE; ELECTRICAL SYSTEM:STARTER ASSEMBLY. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to a Slow Start and/or No Start, Battery Message Indicated, having to jump start on more then one occasion.
PIE0574A2020-10-26. 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.
110089005P2020-10-26. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This Warranty Administration bulletin provides information on Dealer Empowerment for Goodwill, Customer Enthusiasm and Policy (U.S. Only).
20NA1992020-10-26. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This technical bulletin provides repair information to correct a customer concern of Radio Software Version U150 Update.
20NA1972020-10-26. 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.
20NA1942020-10-26. Service bulletin. EQUIPMENT; STRUCTURE:BODY; EQUIPMENT ADAPTIVE/MOBILITY. This technical bulletin provides repair information to correct a customer concern of Hard Tri-Fold tonneau water leaks at the front corners of the pickup box.
20NA1922020-10-26. Service bulletin. STEERING; EQUIPMENT. This technical bulletin provides a procedure to try multiple different adjustments based on the condition of Steering Dither/Shake or Quick Steering Wheel Oscillation at Speeds of 80-129?km/h (50-80?mph).
20NA1872020-10-26. Service bulletin. POWER TRAIN. This technical bulletin provides a repair procedure to correct a customer concern of Delayed and/or Harsh Engagement of Transmission Shift After Vehicle Sitting with Engine Off.
20NA1832020-10-26. Service bulletin. STRUCTURE; EQUIPMENT. This technical bulletin provides repair information to correct a customer concern of seeing that the Summit White paint on front impact bar appears off-color, slightly yellow.
20NA1762020-10-26. Service bulletin. ENGINE; ELECTRICAL SYSTEM. This technical bulletin provides a procedure to update the GPCM if found the cause of the customers concern.

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