So on my brothers '06 LS his fan went out a few months ago... We replaced all the fuses and relays, still no fan. Looked like a lot of people have the in line resistor go out, so we got a brand new one from GM and not some aftermarket one, still no fan. Bought a mint HVAC unit on here a few weeks ago from another member, installed that today, still no fan...

WHAT GIVES?!

We night the fan/motor work find cause right now I just have it hot wired with a switch from Menards. So at least he has heat, fan is just either off or on full. All the other functions of the old and new HVAC work also...

ANY insight on this issue would be very much appreciated.

Thanks!

 

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Possible BCM issue. I have wiring diagram if needed.

 

What's a BCM? does it have anything to do with the PCM?

 

body control module

 

When you say HVAC unit do you mean blower motor?

 

Nah, the control unit under the radio. The blower motor works do e when hot wired like we have it now.

Where is this BCM located?

 

This thread might give you some help
https://www.cobaltss.net/forums/08-1...-blown-258395/

 

^^thanks, I checked the BCM 2 and 3 fuses and they were fine. Anyone know where the bcm itself is located?

 

The fuse box in the dash is the BCM. if I remember correctly.