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Service bulletins for the 2024 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.

1439 on file from NHTSA, as of 2026-10-19.

About P2635 on the 2024 GMC Sierra: what the code means, and the bulletins and recalls about the same components.

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Only bulletins with trouble code: P2635 are shown. Show all

Bulletins, newest first
23-NA-0662025-05-06. Service bulletin. ELECTRICAL SYSTEM; ENGINE. This service bulletin refers the technician to Recall N242438501, and if closed, refer to SI to correct the condition of Malfunction Indicator Lamp Illuminated with DTCs P0402, P062D, P144E, P242B, P2459, and/or P2635 Set.
23-NA-0662025-01-15. Service bulletin. ENGINE; ELECTRICAL SYSTEM. This service bulletin refers the technician to Recall N242438501, and if closed, refer to SI to correct the condition of Malfunction Indicator Lamp Illuminated with DTCs P0402, P062D, P144E, P242B, P2459, and/or P2635 Set.
23-NA-0662024-11-15. Service bulletin. ENGINE; ELECTRICAL SYSTEM. This service bulletin refers the technician to Recall N242438501, and if closed, refer to SI to correct the condition of Malfunction Indicator Lamp Illuminated with DTCs P0402, P062D, P144E, P242B, P2459, and/or P2635 Set.
23-NA-0662024-06-18. Service bulletin. ELECTRICAL SYSTEM; ENGINE. This service bulletin refers the technician to Recall N242438501, and if closed, refer to SI to correct the condition of Malfunction Indicator Lamp Illuminated with DTCs P0402, P062D, P144E, P242B, P2459, and/or P2635 Set.
23-NA-0662024-05-02. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. This service bulletin provides a procedure to correct the condition of Malfunction Indicator Lamp Illuminated with DTCs P0402, P062D, P144E, P242B, P2459, and/or P2635 Set.
PIP5916B2023-06-13. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE. This Preliminary information communicates that there is a software issue in the ecm for the following dtc's P062D P163A P163B, P0402 P144E. P2635 which could cause a crank, no start issue, and how to correct.
PIP5916A2023-06-13. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE. This Preliminary information communicates that there is a software issue in the ecm for the following dtc's P062D P163A P163B, P0402 P144E. P2635 which could cause a crank, no start issue, and how to correct.

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