Service bulletins for the 2021 Chevrolet Suburban
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.
1440 on file from NHTSA, as of 2026-10-19.
By type
By component
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Only bulletins with type: Service bulletin are shown. Show all
| PIT6477D | 2026-10-06. 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 |
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| PIT5698F | 2026-09-30. Service bulletin. UNKNOWN OR OTHER. This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it. |
| PIT5801F | 2026-09-10. Service bulletin. UNKNOWN OR OTHER. This preliminary information communicates diagnostic tips for air leveling suspension system. |
| PIP4902W | 2026-09-10. Service bulletin. UNKNOWN OR OTHER. This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance. |
| PIT5869B | 2026-09-02. 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. |
| PIC6551C | 2026-08-27. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues |
| PIT6446A | 2026-07-30. 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. |
| PIT5099J | 2026-07-29. Service bulletin. UNKNOWN OR OTHER. PI to help diagnose A/C concern |
| PIT5509N | 2026-07-29. Service bulletin. UNKNOWN OR OTHER. This PI provides diagnostic tips for diagnosing electric trailer brakes issues. |
| PIT5966F | 2026-07-07. 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. |
| PIT6132E | 2026-06-18. 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. |
| PIT6477C | 2026-06-08. 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 |
| PIT5509M | 2026-05-19. Service bulletin. UNKNOWN OR OTHER. This PI provides diagnostic tips for diagnosing electric trailer brakes issues. |
| PIC6423A | 2026-05-19. Service bulletin. UNKNOWN OR OTHER. Pi created to provide GM dealers with information on gathering information for projection issue |
| PIC6551B | 2026-05-19. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues |
| PIT6511 | 2026-05-02. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates an issue with a replace or low FOB battery message |
| PIT6507 | 2026-04-29. Service bulletin. UNKNOWN OR OTHER. This PI communicates information on a SPS programming issue causing Serial Data Authentication Configuration to fail. |
| PIT3271Q | 2026-04-07. Service bulletin. UNKNOWN OR OTHER. This preliminary information communicates information about how to determine if a wheel and tires size change is available. |
| PIT6347B | 2026-03-31. 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. |
| PIP6104 | 2026-03-17. 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. |
| PIP4902V | 2026-03-17. Service bulletin. UNKNOWN OR OTHER. This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance. |
| PIT6425D | 2026-03-11. 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 |
| PIT6415A | 2026-02-23. 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. |
| PIT5985K | 2026-02-01. 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. |
| PIP6098 | 2026-01-19. Service bulletin. UNKNOWN OR OTHER. This PI advised dealer technicians of possible causes of diesel fuel contamination in gasoline powered vehicles and advises of warranty direction. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.