Question about 1994 Chevrolet C1500

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Damper thump there is a thump at start up and turn off in the passenger side floorboard.

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Try replacing your air conditioner accuator vent motor. not sure if this is spelled correctly but i had same problem and this solved it

Posted on Feb 12, 2013

  • McGyver2 Jan 06, 2014

    Thumping on initial startup is the air flow damper. The computer tells the damper to position itself for fresh air flow each time you turn the key on. Very difficult to access this particular item. I would say remove glove compartment and turn the key on. You will be able to find the exact controller through that access. Now I actually removed the culprit and opened it up. A broken tooth on the servo motor gear was the failure. Instead of replacing the controller. I just cut the ground wire and placed a switch in the series. I leave it in the off position. No thumping.

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SOURCE: Floorboard is wet on passenger side of a 2004 trailblazer

blown heater core

Posted on May 31, 2009

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SOURCE: fluid leaking onto the front passenger side floorboards.

2004 TB 60,000 miles. i was just told that the leaking fluid in my passenger side floorboard was do to a clogged up A/c hose. An A/C works by drying/ removing the moisture from the air inside the vehicle and cooling it. The accumulated fluid is usually evacuated under the vehicle which is what you see when people are stopped at a red light and there is dripping under their car. when a hose is blocked there is a vent that from some reason flows directly into the passenger side floor board. If you can not manually knock loose the block your probably going to have to take it to a mechanic.

Posted on Jun 14, 2009

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