Questions & Answers for: front heater working 2002 gmc

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...and both, supply and return are fairly warm. Fuse for front heater is ok. Car has 102,000 miles and has gone through 100K service by the dealer in Dec. check you antifreeze level and make sure its ...

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the heater wont blow or turn on when i use the dial rear heat and fan works but the front heater doesn't work. Maybe your fan motor has quit working ,but first check your fuses

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the heater wont blow or turn on when i use the control in the front Check blower fan switch if that's working maybe your heater core

...turn the heater on the front with the heater off for the back keep an eye on the temp guage if it goes up than normal then its clogged.... Fyi u have to run the engine for awhile with the heater fan ...

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