1. Preparation is Key:
* Safety First: Disconnect the negative (-) battery cable to prevent electrical shorts.
* Gather Tools: You'll need a socket set (likely a 7/16" or ½" socket for the distributor hold-down clamp, depending on your vehicle), a screwdriver (possibly Phillips), and possibly pliers for stubborn connectors.
* New Parts: Have your new distributor cap and rotor ready.
* Workspace: Work in a well-lit area with good access to the distributor.
2. Locating the Distributor:
The distributor is usually located on the engine, near the front and slightly towards the passenger side. It's a cylindrical component with wires connected to the top (cap).
3. Removing the Distributor Cap:
* Carefully disconnect the spark plug wires from the distributor cap. Note the order – you'll need to put them back in the same position. Take a picture or use a marker to label each wire and its corresponding position on the cap if you're uncertain.
* Once disconnected, gently lift off the distributor cap.
4. Removing the Rotor:
* The rotor is a small spinning component inside the distributor cap. It's typically held in place by friction, simply pull it straight up and off the distributor shaft.
5. Installing the New Rotor:
* Carefully align the new rotor onto the distributor shaft, ensuring it sits correctly and is snug.
6. Installing the New Distributor Cap:
* Carefully align the new distributor cap onto the distributor housing. It should snap into place.
* Reconnect the spark plug wires, ensuring they are in the same position as before.
7. Reconnecting the Battery:
* Reconnect the negative (-) battery cable.
Important Considerations:
* Timing: While replacing the cap and rotor doesn't directly affect the engine timing, if you accidentally rotate the distributor during installation, your engine might run poorly or not at all. Try to avoid rotating the distributor body itself. If you have to remove the distributor, you'll need to find the correct timing position when reinstalling it - this requires special tools and is considerably more advanced.
* Worn Parts: While you're there, check the condition of the distributor shaft. If it's excessively worn, the new cap and rotor won't be effective.
If you are uncomfortable performing this task yourself, it's always best to consult a qualified mechanic. This process is relatively easy, but a mistake could cause engine damage. Improper reinstallation could result in a misfire, poor running, or even damage to your engine. The specific location of the parts and their removal procedure can vary slightly between models. Refer to a repair manual or online resources specific to your 1999 Suburban 454 for more detailed and accurate instructions.
