Question about 2003 Chevrolet Tahoe
It has an internal card fuse which sits in the bottom of the blower unit.these get condensation and rust so the contact strips corrode over time.you remove by unscrewing one Philips screw and pull the fuse card out...inspect.i fixed mine by solder wire bridge across the breaks but if you can source from breakers or eBay all well and good.
Posted on Apr 01, 2015
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Posted on Jan 02, 2017
SOURCE: 2003 chevy tahoe no rear heat
I know the earlier tahoe's have two heater lines running from the engine compartment to the rear under the vechile. Those lines could be clogged or pinched shut. What you do is get two hose locking pliers. Go under your truck, they are two metal lines that turn into rubber and back into metal again farther down the line. First, checked for pinched lines. If none, find where the rubber hoses are, clamp them off, remove from metal lines and drain. Use garden hose to flush fresh water through. When water comes through at high pressure and pretty clear, it should be done. Reconnect hoses, top off radiator fluid and it should be fine.
Posted on Feb 21, 2009
Remove the shroud below glove box, 2 screws and a snap-pop fitting. Be careful of the courtesy light. Remove the blower moter and disconnect the purple/black power connector to it - - you'll need this extra room to work with. 2 more screws, same size, 6.5mm on mine, 7or 8mm on some others, that holds the blower motor resistor in place. This replacement part is less than 40 bones at most parts store. Unplug, replace, re-install, test and you're on your way with about 2 hours of slow paced effort in your own driveway. Typical cost at a garage - up to $400, what a sham.
Posted on Mar 19, 2009
There is an updated resistor/connector package. Very expensive from GM, try your local NAPA or other parts supplier for a replacement
Posted on Jul 09, 2009
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