Location of the spark plugs for a 2002 chevy trailblazer?
Remove the air cleaner outlet resonator from the engine. (the plastic thing in the middle) the coils sit right on top of the plugs. Disconnect the ignition coil connectors, then remove the bolt and pull out the coil. the sparkplug is at the bottom of the hole :) remember to torque the bolt back down to 89 in-lb (10 Nm) and use alittle dielectric grease on the end of the boot. and finally dont forget the anti-sieze compound on the threads of the new sparkplugs before installing :)
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