Question about 2002 Chevrolet TrailBlazer
Directly on top of the engine, six in a row front to back... but you need to remove the COP coil on plugs to find them.
emove the resonator box that sits over the engine. Now you will see the six electrical connections to the plugs.
Carefully remove the coil units as they have two long bolts holding them down. Use slow steady pressure and maybe a slight tap downward to break any stuck bolts. If it snaps off you are in trouble.
Do not over tighten plugs. Just snug. Never clean these plugs. Iridium plugs must not be tampered with in any way. They are coated ... remove the coating and they burn out.
Posted on Nov 18, 2009
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Posted on Jan 02, 2017
Tips for a great answer:
The spark plugs in the v6 can become an involved job as the upper intake manifold. The LS uses a Coil on Plug (COP) ignition system, meaning that the spark plugs are located under the ignition coil
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