Removal & Installation
Before servicing the vehicle, refer to the Precautions Section.
NOTEDisconnecting the negative battery cable on some vehicles may interfere with the functions of the on-board computer systems and may require the computer to undergo a relearning process, once the negative battery cable is reconnected.
NOTEIf working near and/or around the SRS system and components, be sure to properly disable the SRS system. See disarming/arming the SRS system.
- Disconnect the negative battery cable.
- Remove the air cleaner assembly.
- Disconnect the electrical connectors from the side of the distributor.
- Remove the distributor cover and wire retainer, if equipped. Turn the retaining screws counterclockwise and remove the cap.
- Mark the relationship of the rotor to the distributor housing and the housing relationship to the engine.
- Remove the distributor retaining bolt and hold-down clamp.
- Pull the distributor up until the rotor just stops turning counterclockwise and again note the position of the rotor.
Remove the distributor from the engine.
Be sure to use new fasteners, as required.
Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread sealer are identified. Do not use paints, lubricants or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners.
- Insert the distributor into the engine, with the rotor aligned to the last mark made, then slowly install the distributor the rest of the way until all marks previously made are aligned.
- Install the distributor hold-down clamp and retaining bolt.
- If removed, install the wiring harness retainer and secondary wires.
- Install the distributor cap.
- Reconnect the wire connectors to the side of the distributor. Make certain the connectors are fully seated and latched.
Reconnect the negative battery cable.
NOTEIf the engine was accidentally cranked after the distributor was removed, the following procedure can be used during installation.
- Remove the No. 1 spark plug.
- Place a finger over the spark plug hole and have a helper crank the engine slowly until compression is felt.
- Align the timing mark on the pulley to 0 on the engine timing indicator.
- Turn the distributor rotor to point between No. 1 spark plug tower on the distributor cap.
- Install the distributor assembly in the engine and ensure the rotor is pointing toward the No. 1 spark plug tower.
- Install the cap and spark plug wires.
- Check and adjust engine timing.
- Using the GM diagnostic scan tool or aftermarket equivalent reprogram the necessary systems and components. Be sure to follow the scan tool manufacturer-s directions.