Question about 2001 Chevrolet Tahoe

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Control switch for heater/ac only works on # 5 speed, why doesnt 1 thru 4 work

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This is typical of a voltage resistor pack problem, it controls the different speeds of the fan.
I'm not familier with your Tahoe, but this is usually installed right in the air stream of the fan to keep it cool.
Look for a connector block with 3 or four wires, installed under the dash of passenger side, right ito the air tube moulding, very close to the fan.. 2 or 3 screws, should be quite easy to replace it and inexpensive. Just be sure to install the new one all the way before trying to turn on fan. It needs the blowing air to cool or may burn out immediatly.

Posted on Mar 26, 2011

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