you have to lift it up and do it through the flap in the wheel well. The number three plug is especially dificult due to the steering wheel assembly. You may have to buy a cheap wrench and cut if down to get behind the collum.
the Chevy 5300, 2003 and other v8 built in that year the spark plug gap should be set at .060
A wiring plug diagram for 2003 Chevy Cavalier spark plug wires is located in the service manual. The Manual can be bought from an auto parts, the dealer, or some libraries.
.60
the spark gap for the 3.1 is 60,
To change the spark plugs in a Chevy Celebrity: 1. Give the spark plug boot a twist to free it up from the spark plug, then pull on the boot to remove the spark plug wire from the spark plug. 2. Use a 5/8" spark plug socket with an extension and ratchet or breaker bar to loosen then remove the spark plug. 3. Set the gap on the new plug to .045" then screw it back into the spark plug hole in the head. Tighten the spark plug and replace the spark plug wire. I change the spark plugs one at a time to keep from getting the spark plug wires on the wrong spark plug.
You need a 5/8" spark plug socket.
One at a time.
Twist boot then pull, this will break the seal from the plug.
gap .060 good luck
take it to dealer
no distributor or spark plug wires its a coil pack on the top of the engine.
Click the link.