Question about 2005 GMC Envoy
If you have the Inline 6 cylinder engine, the plugs are on top of the engine under the airbox (the one that says Vortec 4200). The airbox is held down by several bolts, disconnect the large air inlet hose and small hose on right side. Once airbox is removed, the coil packs can be seen, remove one coil pack at a time by loosening the single bolt (this bolt stays on the pack), carefully pry the coil pack up. The spark plug will be visible in the well. Make sure to clean out the well before loosening spark plug. Make sure to use only AC Delco plugs.
Posted on Sep 27, 2010
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Posted on Jan 02, 2017
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