2006 GMC Sierra air conditioning, hot electrical smell comi

Tiny
TERRYDOMINO
  • MEMBER
  • 2006 GMC SIERRA
  • V8
  • 4WD
  • AUTOMATIC
  • 57,000 MILES
I have a hot electrical smell coming from my vents when the air conditioning is on. I turned off the air conditiong and let the fan blow, the "hot electrical smell" subsided. The smell is similar to having two wired crossed.
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Monday, May 24th, 2010 AT 1:57 PM

7 Replies

Tiny
DOCFIXIT
  • EXPERT
Hi
Automatic or Manual A/C? Maybe the Mode Select Motor or Recirclate Motor.
Let me know
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Tuesday, May 25th, 2010 AT 8:23 AM
Tiny
TERRYDOMINO
  • MEMBER
I did some investigation (running a/c but with hood up and could not smell the hot electrical smell) so it doesn't appear to be the AC, is seems the hot electrical smell is in the engine bay and getting sucked back into the cab. After driving it, I opened the hood and could smell it. I can not see any melted wires or anything that looked out of the ordinary. I sniffed around also but could not locate where it is coming from in the engine bay.
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Tuesday, May 25th, 2010 AT 8:29 AM
Tiny
DOCFIXIT
  • EXPERT
Could smell be oil on exhaust manifold?
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Tuesday, May 25th, 2010 AT 9:37 AM
Tiny
TERRYDOMINO
  • MEMBER
No, the engine bay is clean. Not oil or antifreeze. Definetly electrical. Smells like two wires are crossed. It has to be getting hot enough to force its way into the cab even without the fan running. I'm guessing it has to be a heavy guage wire since it hasn't burnt off or blew a fuse. I'm not sure where the outside air get's pulled into the blower motor but i'm wondering if it's close to that area. You can smell it at low speeds 25-30mph without the fan being on.
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Tuesday, May 25th, 2010 AT 9:50 AM
Tiny
DOCFIXIT
  • EXPERT
Is vehicle the Hybrid model? Is Alt really hot? Pos and Neg battery cables hot?
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Tuesday, May 25th, 2010 AT 11:10 AM
Tiny
TERRYDOMINO
  • MEMBER
No, it is a 5.3l V8. I touched every wire I could and did not feel any hot ones. Niether the alternator or compressor seem hot. I could not find any visible damage to any wiring in the engine bay.
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Tuesday, May 25th, 2010 AT 11:14 AM
Tiny
TERRYDOMINO
  • MEMBER
It really smells like someone mis-wired and failed to use an in line fuse.
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Tuesday, May 25th, 2010 AT 11:22 AM

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