Blower moter on a/c and heater quit need to know where fuse is

http://ricksfreeautorepairadvice.com/blower-motor-wont-shut-off/

Blower moters are usually good for about ten years. If you can run 12 volts directly to the blower moter and it wont run. It will need to be replaced

Hi! Please check the fuse if it's blown. Surely is a fuse problem. Have a good one!

f that just put power to the blower moter and see it it runs if you pull the relay jump a wire across the terminals with it out and add a ground wire to the case of the blower to another spot on the chasis if it still does not run your blower switch may be bad dont worry just run a toggle switch to a good blower moter

In the fuse block,under the hood on top of the fender. Locate fuse #35 it's 40amp fuse for the blower moter. If the fuse is ok,there is another
common problem you can check. The blower moter resistor assembly,
located under the dash on right side. With a 12v test light check for
power to the blower moter from the resistor. If you have no power to the
moter, replace the resistor assembly. If niether of these works, I'll need
to know if you have climate control or manual control hvac. And for some reason, the wheel base. long wb or short wb. to dig any deeper.
But I hope one of the causes I've mentioned will cure the problem.
Good luck.

Heater: make sure temperature slider is all the way to the red /hot zone. This is a different slider than the one for blower speed. Blower setting will not change the temperature. Sprayer: 1) make sure rubber hose from tank to sprayer is purged (full of water). If unpurged, water wont reach sprayer. 2) make sure that hose did not detach. 3) Can you hear the water pump running when activating the sprayer? maybe cable became unhooked or pump is shot.

stopped up heater core

My 2003 Sierra's blower came on by itself in the garage while I was sleeping and ran the battery completely down. I had to replace the blower switch located under the glove box next to the blower at the bottom of the right corner of the dash. The switch is in front of the blower and held in by two screws. Disconnect the two wire connections. This is a "dealer only" part and cost me 65.00. Also check the wire harness with seven wires connected to it for melted plastic. It will be marked "ABCDEFG". If it has melted, you'll need to replace it. Pay attention when reinstalling either part, that the wires "ABCDEFG" match the switch in that order.

Your heater problem could be a blower motor resistor if the motor does not work at all. If the blower does work then the problem could be a bad heater valve. I assume that the 30 amp blower fuse is good. The seats and overdrive light have no connection with the blower. Does the heated seat light come on? Do you have automatic temp control.

There is a fuse panel under the dash on the driver's side and the maxi-fuse box is under the hood on the driver's side. If the fuses are good, it is probably the blower fan which is located under the dash on the passenger's side. (Behind the glove box.)