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Sherry Miller-May Posted on Jun 04, 2016
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Normal rpm schedule 2002 chevy trailblazer - 2002 Chevrolet TrailBlazer

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john h

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  • Chevrolet Master 29,494 Answers
  • Posted on Jun 04, 2016
john h
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1answer

My 02 chevy trailblazer's rpm fluxchuates when

Many of the 6 cyl. engines are prone to carbon build-up in the throttle body. If this is the case, it is best to clean it off the car and is fairly easy to do. Remove the snorkel, 1 electric fitting on the throttle body (a little tricky) and one vacuum line on tb as well. Four bolts remove the tb from the engine and the throttle body can be cleaned with throttle body cleaner from any auto supply store. An o-ring attaches the tb to the engine so that you will not destroy a gasket during the repair. Pretty easy and should take less than 1 hour, but be careful of sharp edges in the throttle body.
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WHAT IS REGULAR TRANSMIISION SERVICE AND TUNEUP SCHEDULE FOR A 2002 CHEVY TRAILBLAZER 4X4 WITH 100000 MILES ON IT. IT DID NOT HAVE A OWNERS MANUAL WHEN WE BOUGHT IT. THANKS BOB

Well the tranny service should be done every 30,000-40,000 miles and the tune up like plugs and and plug wires about every 30,000 miles.
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2002 Chevy Trailblazer surges on the highway. Tach bumps up 100-200 rpm while occurring.

I would be suspect of the throttle position sensor, but have the codes read, WRITE THEM DOWN (if there are any), and report back here. TPS's failures will sometimes throw a code but does not require a CEL when they do.
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Stalling 02 Chevy Trailblazer

check fuel pump pressure or clogged fuel filter
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2002 chevy trailblazer... obd11 says P1484 emissions control? What part is it that i need to replace???

Cooling fan RPM signal malfunction. Poor electrical connection - check for rubbed through wire at clutch. Failed fan clutch assembly
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2002 chevy trailblazer,engine is loud and sounds like it is racing

If it was like mine, It sounds like a semi truck instead of a SUV.
It was my fan clutch staying engaged, replace it and everything was back to normal.
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