Service bulletins for the 2019 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.
2009 on file from NHTSA, as of 2026-10-19.
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Only bulletins with component: Turbocharger or supercharger are shown. Show all
| 21NA113 | 2022-06-21. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE. This technical bulletin provides a procedure to perform a learn procedure for the turbo actuator. |
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| N192219370 | 2019-12-30. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. Certain 2019 model year Chevrolet Silverado (New Model) and GMC Sierra 1500 (New Model) vehicles, equipped with a 2.7L, 4 cyl. Turbo engine (L3B), may have a condition where the engine wiring harness could wear through in several locations. This may allow the engine harness to short to ground and/or be severed, which may lead to a check engine light, reduced engine power, no start condition or in rare cases a stall. Dealers are to wrap the wiring harness with Nylogard sleeve(s) in areas of concern. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.