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Service bulletins for the 2021 GMC Yukon

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.

1240 on file from NHTSA, as of 2026-10-19.

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By component

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Only bulletins with type: Service bulletin are shown. Show all

Bulletins, newest first
PIT6477D2026-10-06. Service bulletin. UNKNOWN OR OTHER. This preliminary PI was created to advise techniians in the field that they will not be able to perform a GDS automated bleed with the scan tool dues to a issue with the software in the scan tool
PIT5698F2026-09-30. Service bulletin. UNKNOWN OR OTHER. This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
PIT5801F2026-09-10. Service bulletin. UNKNOWN OR OTHER. This preliminary information communicates diagnostic tips for air leveling suspension system.
PIP4902W2026-09-10. Service bulletin. UNKNOWN OR OTHER. This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
PIT5869B2026-09-02. Service bulletin. UNKNOWN OR OTHER. This PI provides a diagnostic tip when fuse F4DR is opening and dealerships are to inspect the wiring at the center console lid.
PIC6551C2026-08-27. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
PIT6446A2026-07-30. Service bulletin. UNKNOWN OR OTHER. This PI Communicates information to ensure Memory Recall is enabled to ensure memory mirrors return to set position after curbview assist is used.
PIT5099J2026-07-29. Service bulletin. UNKNOWN OR OTHER. PI to help diagnose A/C concern
PIT5509N2026-07-29. Service bulletin. UNKNOWN OR OTHER. This PI provides diagnostic tips for diagnosing electric trailer brakes issues.
PIT5966F2026-07-07. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates an issue with an OTA pending message still displayed after an OTA event and how to reset/clear the message.
PIT65222026-06-18. Service bulletin. UNKNOWN OR OTHER. This PI advises dealers that if the K160 Brake System Control Module sets DTC P0606 along with P0562 and/or P25A2, additional diagnostic aids should be followed before replacing parts. The PI provides guidance to inspect for low voltage conditions, wiring, terminal concerns, and module communication issues that may cause false or intermittent EBCM DTCs.
PIT6132E2026-06-18. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates an issues with the HVAC making a hum buzz noise when the blower is set to a higher speed. Engineering is working on a new HVAC door seal material to correct the noise.
PIT6477C2026-06-08. Service bulletin. UNKNOWN OR OTHER. This preliminary PI was created to advise techniians in the field that they will not be able to perform a GDS automated bleed with the scan tool dues to a issue with the software in the scan tool
PIT5509M2026-05-19. Service bulletin. UNKNOWN OR OTHER. This PI provides diagnostic tips for diagnosing electric trailer brakes issues.
PIC6423A2026-05-19. Service bulletin. UNKNOWN OR OTHER. Pi created to provide GM dealers with information on gathering information for projection issue
PIC6551B2026-05-19. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
PIT65112026-05-02. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates an issue with a replace or low FOB battery message
PIT65072026-04-29. Service bulletin. UNKNOWN OR OTHER. This PI communicates information on a SPS programming issue causing Serial Data Authentication Configuration to fail.
PIT3271Q2026-04-07. Service bulletin. UNKNOWN OR OTHER. This preliminary information communicates information about how to determine if a wheel and tires size change is available.
PIT6347B2026-03-31. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates an issue with ABS SES MIL / Service Brake System / Service StabiliTrak / BSCM DTC P0606 P0562 and dealers to perform additional battery and connection testing.
PIP61042026-03-17. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical Assistance Case in CX Connect.
PIP4902V2026-03-17. Service bulletin. UNKNOWN OR OTHER. This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
PIT6425D2026-03-11. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC'ss
PIT6415A2026-02-23. Service bulletin. UNKNOWN OR OTHER. PI to explain normal operation for a concern that the outside rearview mirrors may not fold when the doors are locked, due to the personalization settings for Auto Door Unlocking.
PIT5985K2026-02-01. Service bulletin. UNKNOWN OR OTHER. This PI provides diagnostics tips to dealership techs when trying to diagnose a CAN Bus communication issue after an event like a lightning strike, battery jump started backwards, failure over the air update, etc.

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