Service bulletins for the 2023 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.
1037 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
By topic
Only bulletins with component: Heating and air conditioning are shown. Show all
| PIT6132 | 2024-04-15. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. 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. |
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| PIT5734G | 2024-02-12. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. 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. |
| PIT5869A | 2023-12-26. Service bulletin. ELECTRICAL SYSTEM; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This Preliminary information communicates an issues with an SES MIL, A/C blowing warm air and DTC's B1AA3 U3018 U3505 due to Fuse F4DR open. Dealers are to inspect the wiring in the front floor console. |
| PIT6032C | 2023-12-18. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This Preliminary information communicates an issue with the front HVAC blower speed reducing to a lower speeding when it should be higher. Engineering is working on a fix. |
| PIT5734F | 2023-08-21. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. 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. |
| PIT6032A | 2023-07-17. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE. This Preliminary information communicates an issue with the front HVAC blower speed reducing to a lower speeding when it should be higher. Engineering is working on a fix. |
| PIT6032 | 2023-07-17. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This Preliminary information communicates an issue with the front HVAC blower speed reducing to a lower speeding when it should be higher. Engineering is working on a fix. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.