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Where are the spark plugs located on 2003 gmc envoy?

Left Bank

Remove ignition coil electrical connectors:

1. Lift the coil retention module to remove the coil (1) connector from the coil-on-plug ignition coil (2) .

2. Remove the remaining coil retention module bolts and discard the module.

Right Bank

Remove ignition coil electrical connectors:

1. Disconnect battery negative cable prior to servicing, if equipped with a dual-battery system.

2. Remove the engine air inlet duct (1) .

3. Remove the fuel injector wire protector.

4. Remove the air intake manifold.

5. Unfasten the coil (1) connector from the coil-on-plug ignition coil (2) .

Both Banks

Remove ignition coils:

1. Pull upwards to remove the coil (1) from spark plug (2) .

Install

To install, reverse removal procedures and tighten coil bolts to 24 lb-ft (32 Nm).