I do not need the wiring diagram for a car. I have

1998 Chevrolet Tahoe/Wheelbase
111.5 to 117.5? the wheelbase of a 2004 Chevy Silverado ---119 to 157.5? not compatible

Test with a voltmeter , metal tab's on top of fuse , should have battery voltage on both tab's . Don't go by look's good , test to know for sure . Look at a wiring diagram an test the whole electrical circuit to find the problem . Doesn't it work at any speed ? Does it have manual or automatic climate control ?
TechConnect Ep 37 How To Test Chevy Blower Motor Resistor DR775

Go to this link for wiring diagrams. http://bbbind.com/free_tsb.html

really need model there are over15 different ones

I have a 90 z71 that had the same problem . I had to change the siolnoid on the frontend.

the best thing for you to do is stop by your local GM dealership in the parts department and they be able to print you off all of the diagrams and pictures you will need

Should swap right out.

The RH (Passenger's) side Cylinders 1, 2, 3, and 4 The LH (Driver's side) Cylinders 5, 6, 7 and 8

you can get it online or go too auto zone and look it up in the manual

i got the part used 25.00 email me picture on door to [email protected] power or man. thanks randy