2006 CHEVY EXPRESS AUX FAN ONLY HIGH SPEED - RESISTOR?

  • Tiny
  • swwizzard
  • 2006 Chevrolet Express
  • V8
  • 2WD
  • automatic
  • 75,000 miles

2006 Chevy Express 3500 12 passenger van: HVAC auxiliary rear fan only operates in high from both controls. Is this caused by a defective resistor module? Where is the auxiliary fan resistor assembly in the vehicle?

I have found a couple of vendors that advertise an ACDELCO Part # 158623 as a Rear Blower Motor Resistor. Is this the correct part number.

Is there a wire harness between the switch assembly and the resistor? If so, any recommend part numbers for repair if wires were overheated?

Is a wiring diagram available?

Any other thoughts would be appreciated.

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Friday, April 29th, 2011 AT 12:13 AM

3 Replies

  • Tiny
  • saturntech9
  • Expert
  • 29,868 posts

I posted the diagram how to remove the rear aux resistor. This is a manual a/c meaning you don't set the temp you want it to cool too?

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Friday, April 29th, 2011 AT 12:38 AM
  • Tiny
  • swwizzard
  • Member

There is a temperature dial on the control pannels. However it is just a warmer/colder dial (blue/red) like the main front panel

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Friday, April 29th, 2011 AT 7:52 PM
  • Tiny
  • saturntech9
  • Expert
  • 29,868 posts

You need get to the aux blower motor resistor and put the switch to med and see if you have power to the light blue wire terminal c at the resistor card. Let me know what you find.

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Saturday, April 30th, 2011 AT 6:12 PM

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