Question about 2004 GMC Envoy
Posted by Anonymous on
Sounds like a classic new fan clutch, very common problem with Trailblazers and Envoys. Sometimes updating the software in the PCM will work. I would try changing the fan clutch or change it again. Worked for me, I got a lifetime warranty clutch. Just rip it out and replace. Clicking/ticking gone. Our fan clutch has many design flaws. Get the newest one you can.
Posted on Aug 03, 2016
Sounds like a lifter hasn't pumped up . Put an additive in the engine oil that quiets noisy lifters. Any auto parts store or even walmart has it.
Posted on Jul 24, 2016
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Posted on Jan 02, 2017
Your air temp control blend door actuator is failing, that is the part u call a heater door, it is a gear driven miniature drive, the gears are jumping teeth making the noise, it will stop working very soon.
Posted on Apr 24, 2009
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