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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
20NA1752020-10-26. Service bulletin. STRUCTURE. This technical bulletin provides repair information to correct a customer concern of vertical misalignment between cab and pickup box on driver side of vehicle.
20NA1552020-10-26. Service bulletin. ENGINE; ELECTRICAL SYSTEM:SOFTWARE. This technical bulletin provides repair information to correct a customer concern of Service Engine Soon Message at Start Up or Shortly after Start Up.
20NA0732020-10-26. Service bulletin. SERVICE BRAKES. This technical bulletin provides repair information to correct a customer concern of Loss of Brake Assist, Various Messages Displayed in Driver Information Center (DIC), Brake Pedal Travel and Apply May Feel Different, One or More of the Following DTCs May be Set: P0606 with C0021, C05D2, C0595, C2A3B, C0024, C053D, P25A2.
18NA3612020-10-26. 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.
18NA3062020-10-26. Service bulletin. EQUIPMENT; STRUCTURE:BODY. This Warranty Administration bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA) (US dealers only).
16NA0192020-10-26. Service bulletin. POWER TRAIN. This informational bulletin provides information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flares.
N2023040802020-10-26. 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.
PIP57532020-10-19. Service bulletin. WHEELS; PARKING BRAKE. PIP5753 created to advise the technician to inspect for loose bolts on the turbocharger if there is a performance issue and code set.
PIP5748A2020-10-19. Service bulletin. BACK OVER PREVENTION. 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.
PIT57522020-10-19. Service bulletin. EQUIPMENT:ELECTRICAL. This Preliminary information communicates multiple vehicle issues caused by an aftermarket device and it gives dealership information where to inspect for this device.
PIP5752A2020-10-19. 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
PIP5733D2020-10-19. 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
PIT57542020-10-19. Service bulletin. EQUIPMENT. This Preliminary information communicates information on radio software anamolies and future radio software updates to correct the concern.
PIT5737B2020-10-19. Service bulletin. EQUIPMENT. This Preliminary information communicates an XM service concern of no audio at startup until a channel change and directs to contact XM for direct support.
PIT5709A2020-10-19. Service bulletin. STRUCTURE. This Preliminary information communicates the need for proper documentation when submitting a Field Product Report on paint issues with the new HD Silverado and Sierra.
PIT57562020-10-19. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates an issue with the underhood electrical center bolts being loose which can cause any of the following symptoms: - No crank - No start - Starter grinds or reengages after engine running - Headlights flicker or flash - SES MIL - IPC gauges sweep/fluctuate and various IPC warning lights or messages - High or low system voltage Some of these concerns may be notices with powertrain movement, like when either accelerating or braking.
PIP57512020-10-19. Service bulletin. ENGINE AND ENGINE COOLING. This PI was created to gather data to root cause the P06DD and/or oil consumption
PIP5737A2020-10-19. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates additional diagnostic tips when diagnosing engine oil leaks on these vehicles.
PIP5722A2020-10-19. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. This Preliminary information communicates to the dealer technician diagnostic tips to aid in finding root case of P0708 setting on vehicles equipped with 8L45, 8L90, 10L60, 10L80 and 10L90 transmissions.
PIE05802020-10-05. Service bulletin. VISIBILITY:POWER WINDOW DEVICES AND CONTROLS. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to a noise coming from the window regulator area.
PIE0578A2020-10-05. Service bulletin. ELECTRICAL SYSTEM. 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.
PIE05762020-10-05. Service bulletin. ELECTRICAL SYSTEM. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards a start/stop event or during a normal start using the push button on the dash the vehicle would not crank causing it to not start.
990089019U2020-10-05. Service bulletin. EQUIPMENT. This Warranty Administration bulletin provides information on Global Warranty Management (GWM) Warranty Parts Center (WPC) Parts Return Program Information.
20NA1672020-09-28. Service bulletin. ELECTRICAL SYSTEM. This technical bulletin provides a procedure to program the ECM if found the cause of the customers concerns.
20NA1662020-09-28. Service bulletin. ENGINE AND ENGINE COOLING. This informational bulletin advises the technician of possible coolant entering the areas of the engine, either through failed parts or defects in the castings, that may be the cause of the concerns related to the MIL or the engine running rough.

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