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The spark plugs are all that are required to be changed. This is at 100,000 miles unless a misfire is detected by the PCM. The coil packs are located directly over the plugs and supply spark. Most times the ignition is flawless and the engine runs smooth.
Error codes will be thrown if the engine misfires.
What else can I help you with?
Does the 2002 Chevy Trailblazer have a timing belt or chain?
It has a chain. No maintance is needed.
How many lugs does the 2002 Chevy Trailblazer have?
2002 Chevy trailblazer has a 6 lug bolt
2002 Chevy Trailblazer oxYGen sensor where is it located?
where is the O2 sensor on a 2002 chevy trailblazer
When was Chevy Trailblazer created?
Chevrolet TrailBlazer was created in 2002.
Where is the location of the fan sensor on 2002 Chevy Trailblazer?
Where is the location of the cooling fan sensor on a 2002 Chevy Trailblazer? Also what is the 800 number for Chevy?
How do you change the spark plugs on a 2002 Chevy Trailblazer?
How do you change the spark plugs on a 2002 chavy trailblazer
How do you replace a throttle body Chevy Trailblazer?
How do you replace a throttle body on a trailblazer 2002
Does the 2002 Chevy Trailblazer have a chip in the key?
Nope!!!
What transmission is in a 2002 Chevy Trailblazer 2wd?
4l60e
How do you disconnect the front fuel line on a 2002 Chevy Trailblazer?
www.trailvoy.com Trailblazer enthusiasts forum!
Where is the location hvac air blend door actuator on 2002 trailblazer?
where is the defrost/floor door actuator on 2002 chevy trailblazer
How many mpg in a 2002 Chevy Trailblazer?
19 on highway
