Service bulletins for the 2021 GMC Acadia
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.
847 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
By topic
Only bulletins with component: Exhaust and emissions are shown. Show all
| 19-NA-044 | 2024-02-21. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL; FUEL SYSTEM, GASOLINE. This service bulletin provides information on the cold start control system in DI engines to reduce cold start emissions and improve fuel economy. |
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| 21-NA-118 | 2023-06-20. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE AND ENGINE COOLING. This technical bulletin provides a procedure to align the exhaust causing a vibration. |
| PIP5841C | 2023-04-17. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV). This Preliminary information communicates the potential for condensation to freeze up inside the Crankcase Pressure Sensor causing dtc P04FB to set. |
| PIP5841B | 2023-02-13. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV). This Preliminary information communicates the potential for condensation to freeze up inside the Crankcase Pressure Sensor causing dtc P04FB to set. |
| PIT5863 | 2021-12-13. Service bulletin. ENGINE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. This Preliminary information communicates that a vehicle may be encountered with a buzz or rattle type noise emanating from the exhaust. The dealer technician is directed to replace the exhaust system. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.