Service bulletins for the 2018 Chevrolet Volt
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.
850 on file from NHTSA, as of 2026-10-19.
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Only bulletins with component: EGR valve are shown. Show all
| 18NA089 | 2018-05-21. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE). This informational bulletin provides information for higher mileage Volts that are having the EGR cooler being plugged not allowing sufficient flow with DTC being set. |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.