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.
By type
By component
By trouble code
By topic
Only bulletins with component: Turn signals are shown. Show all
| 21-NA-166 | 2023-09-29. Service bulletin. ELECTRICAL SYSTEM; EXTERIOR LIGHTING:TURN SIGNAL; EQUIPMENT. This informational bulletin provides information on the turn signal stalk not cancelling and/or mis cancelling. |
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| PIE0625A | 2021-08-09. Service bulletin. EXTERIOR LIGHTING:TURN SIGNAL. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards on a turn signal not canceling and/or mis-canceling. |
| PIE0625 | 2021-05-03. Service bulletin. EXTERIOR LIGHTING:TURN SIGNAL:SWITCH. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards on a turn signal not canceling and/or mis-canceling. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.