General Motors 8.1 — Ignition Coil(s) Replacement

Repair & overhaul

For the General Motors 8.1, from the General Motors service manual.

Applies to: General Motors 8.1L engine

Procedure

1. Disconnect the spark plug wires at the ignition coils.
2. Disconnect the ignition coil harness connector.
3. Remove the ignition coil mounting bolts.
4. Remove the ignition coil.
5. Install the ignition coil.
6. Install the ignition coil mounting bolts.
7. Connect the ignition coil harness connector.
8. Connect the spark plug wires at the ignition coils.

Source: General Motors service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

More General Motors repair guides →