Truck runs good as long as you dont cut the defroster on with the fan. rear defroster ok.
The ac clutch engages any time a defrosters on if you have a ac problem unhook the ac compressor that should take care of it till you have ac fixed
SOURCE: 04 trail blazer
there is a big nut that is part of the fan clutch that unscrews from the water pump .I use a long punch to break it loose then a big adjustible wrench.
SOURCE: 94 blazer vortec 4.3 idle revs up and dont come down
check your Throttle Positioning sensor that should fix your rough idle the TPS controls the breather on the front of the engine its affixed to the right hand side of the throttle body just infront of the spyder on the V6 Vortec 4.3L Models
SOURCE: M y radio stopped working on my 2004 trail blazer
The 2004 Trailblazer has two fuse panels, one in the under hood and one under the middle row seats. The radio fuse is marked RADIO fuse # 41 and is a 15 amp fuse located in the rear fuse panel. To access the rear fuse panel flip the seat behind the driver to the upright position, under it you can see the fuse panel and a diagram should be on the under side of the cover.
Good luck and hope this helps.
SOURCE: rough idle blazer 2000
change air filter.clean throttle plates.remove throttle body remove all electrical parts also all plastics and rubber parts.clean throttle body with gum out throttle body cleaner.dry off throttle body.replace gasket.scan it to check to see if egr valve leaking.also check all vacuum hoses.and pvc valve.
SOURCE: my 95 4.3 vortec blazer wont idle after its warmed up
IAC(Idle air control) and or TPS(throttle position sensor)
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