Common questions

How many spark plugs does a 2002 Chevy TRAILblazer have?

How many spark plugs does a 2002 Chevy TRAILblazer have?

You can now see the spark plug at the bottom of the well; using a 3/8 spark plug socket, remove and replace each of the 6 spark plugs.

Can you replace spark plugs in a Chevy Trailblazer?

A how-to video for replacing the spark plugs in a Chevy 4.2 I6 engine. Always use AC Delco 41-103s in this engine. Yes they cost more then the $1.99 Autolites at Walmart but using other plugs can wipe out the ignition coils. https://www.amazon.com/ACDelco-41-103… NOTE: The AC Delco 41-103s are pregapped from the factory.

Where is the Veci label on a Chevy Trailblazer?

The VECI label is in the engine compartment on the top radiator support, firewall or near the strut towers. Install the spark plug by hand using the spark plug socket and ratchet extension. Then tighten the plug using the ratchet, but don’t over-tighten it.

How do you install spark plugs on a 4.2L engine?

Install the spark plug wire, making sure the wire boot snaps in place over the plug terminal. If you have a 4.2L engine model, install the ignition coil over the plug and tighten the coil mounting bolt; then plug the coil electrical connector. Remove and install the rest of the spark plugs following the same procedure.

A how-to video for replacing the spark plugs in a Chevy 4.2 I6 engine. Always use AC Delco 41-103s in this engine. Yes they cost more then the $1.99 Autolites at Walmart but using other plugs can wipe out the ignition coils. https://www.amazon.com/ACDelco-41-103… NOTE: The AC Delco 41-103s are pregapped from the factory.

The VECI label is in the engine compartment on the top radiator support, firewall or near the strut towers. Install the spark plug by hand using the spark plug socket and ratchet extension. Then tighten the plug using the ratchet, but don’t over-tighten it.

Install the spark plug wire, making sure the wire boot snaps in place over the plug terminal. If you have a 4.2L engine model, install the ignition coil over the plug and tighten the coil mounting bolt; then plug the coil electrical connector. Remove and install the rest of the spark plugs following the same procedure.

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Ruth Doyle