2003 Chevy Tahoe tune up

The fuel filter is normally located along the frame rail of the vehicle. On some vehicles however, it may have been relocated to the engine compartment. When in doubt, trace a fuel line from the engine backwards or from the tank forward in order to locate the filter. Some vehicles utilize a spin-on fuel filter located on the frame rail. This filter can be turned counterclockwise after the fuel pressure is relieved.

Label each spark plug wire and make a note of its routing.
Twist, then pull the spark plug wire from the spark plug and then from the coil pack.
If replacing the spark plug wires, match the old wire with an appropriately sized wire in the new set.
Lubricate the boots and terminals with dielectric grease and install the wire on the coil pack. Make sure the wire snaps into place.
Route the wire in the exact path as the original and connect the wire to the spark plug.
Repeat the process for each remaining wire.

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