Service bulletins for the 2015 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.
3109 on file from NHTSA, as of 2026-10-19.
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Only bulletins with component: Engine are shown. Show all
| SB-080604003-C | 2014-11-08. Service bulletin. ENGINE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE). GMC/CHEVROLET: ENGINES, WITH EGR SYSTEM, HAS LEAKAGE FROM EGR COOLER ENGINE COOLANT INTO THE COMBUSTION CHAMBER. MODEL 2002-15 SILVERADO, SIERRA, 2004-09 KODIAK C4500-C5500, TOPKICK C4500-C5500, 2006-15 EXPRESS, SAVANA. *PE |
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| ER-14231 | 2014-10-06. Service bulletin. ENGINE. IMPCO: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. SOME VEHICLES WITH COMPRESSED NATURAL GAS (CNG) SYSTEM WERE BUILT INCORRECTLY WITH THE ENGINE CONTROL MODULE (ECM) CALIBRATION AND WOULD NEED TO HAVE ECM REPROGRAMMED. MODEL 2015 SILVERADO HD, SIERRA HD. *PE |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.