how to replace sparkplugs on 2002 chevy trailblazer?

[leisa]

6 cylinder

[Robert M]

Hopefully, you will be using a better plug than the factory type. They just waste power and fuel mileage. Buy a set of BOSCH Fusion or Denso Iridium plugs. THEN>>> remove the "resonator, the large thing on top of the engine. After that, you will gain access to the individual spark plug coils. Remove them, and you gain access to the spark plugs. It's a SNAP!!! Good luck!!