Removal Procedure
WARNING: This page is about a different car, the 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 Chevrolet TrailBlazer, and 2004 Buick Rainier. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
- If replacing an individual coil, disconnect the wire harness at the coil. If removing the coil assembly, disconnect the main coil harness connector.
- Disconnect the spark plug wire at the ignition coil (s).
- If replacing an individual coil, remove the ignition coil mounting bolts and/or nut that retains the coil to the coil bracket.
- If removing the coil assembly, remove the bolts securing the coil bracket to the valve rocker arm cover.
- Remove the ignition coil or coil assembly.
CAUTION:
Refer to Battery Disconnect Caution in Cautions and Notices.
IMPORTANT:
The ignition coils can be removed individually or as an assembly, depending on the repair being performed.