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Access GMC  wiring diagrams and repair procedures. Learn how to repair, install or remove a part, reset engine lights...
GMC 258 Engine (L6, 258 cid, 4.2L)
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This GMC 258/4.2L engine/motor can fit the Envoy and some other GMC car and/or truck applications - for more details see your automobile manual.

2003 - 2008

2003-2008 GMC 258 Inline 6 cylinder DOHC 24 Valve
Engine DescriptionSizeVINPrice/Core
2003-2008 GMC 258 Inline 6 cylinder DOHC 24 Valve

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For troubleshooting tips and repair information on the GMC 258/4.2L engine, please visit our Information page.