1
- Ensure the truck is in park, turned off, and has keys removed from ignition.
1999-2007 GMC Sierra 1500 5.3L Spark Plug Replacement
This guide demonstrates how to replace the spark plugs in a 2002 GMC Sierra. Spark plugs need to be replaced every few years. We advise to remove and replace the spark plugs one at a time.
When re-installing the new spark plugs, do not over-tighten them! Also, make sure that your truck has cooled under the hood if the vehicle was recently turned off.
Before starting, make sure your truck is off and in park. Securely prop the hood up to ensure safety during the repair. Lastly, disconnect the car battery.
Step-by-step instructions
2
- Open the hood of your truck using the lever on the drivers side of the cab by the parking brake.
- There is also a latch under the hood itself that needs to be used to open the hood.
3
- Locate the spark plugs on the engine. (4 spark plugs on each side, 8 total, covered by a spark plug boot)
- If the vehicle was recently turned off, beware of hot surfaces while performing this task!
4
- Using the spark plug boot pliers, grab the metal casing and pull.
- Working with spark plug pliers instead of a hand lowers the risk of damaging the rubber boot and wire connected to the spark plug.
5
- Using the socket wrench , extension, and a 5/8 inch socket, place the socket over the spark plug. Using counter clock-wise motion, unscrew the spark plug with the socket wrench.
- If the spark plug does not come out with the socket upon removal, you can carefully, but safely remove the unscrewed spark plug with your hands.
- We suggest to remove and replace each spark plug individually.
Conclusion
To reassemble your device, follow these instructions in reverse order.
Guide content belongs to iFixit, license CC BY-NC-SA. Open original