follow the plug wires they are on the heads
How do you change the spark plugs on a 2002 chavy trailblazer
ALL gasoline engines have spark plugs. Only diesels don't have spark plugs.
What huh?
AC Delco Iridiums
Depends on the size of your engine. IE if, you have a 6 cylinder (v-6) it requires 6 spark plugs etc.
Where are the spark plugs on a trailblazer
A 2004 Chevrolet Trailblazer that has a 4.2 liter engine will have a spark plug gap of .044 inches. The best spark plugs for this vehicle are iridium spark plugs.
I would recommend the OEM spark plugs, AC/Delco. Excellent plugs.
Change the spark plugs every 100,000 miles. Follow the service intervals in the manual. www.trailvoy.com All the answers for your Trailblazer from true enthusiasts.
Down the center of the head under the intake box. You have to remove each coil with one 10mm bolt and then the plugs are easily accessed.
Bad spark plugs, coils are coil, bad injector. Cam are crankshaft sensor
how do i change the spark plugs on a Chevy silverado 1500