I have a 2004 Canyon. The blower is not blowing air on the driver's side front window. The dealership and taken everything apart and has said the last resort is a 8-9 hour tearing the whole thing out....$1000 plus. Any other suggestions. Lots of air and heat, just no air reaching drivers side front window

SOURCE: I have a 2004 GMC

Remove the Positive Battery Terminal, leave the Negative Terminal connected.  Wait 30 minutes.  Attach the Positive Terminal.  Verify temperature settings is around 70 degrees.  This procedure has been known to resolve computer settings.

SOURCE: 2005 Yukon Denalli - Blow cold air out the drivers side

the passenger side electronic controller is sensing the passenger side temperature is cooler than it really is, which causes the controller to increase the hot water flow to warm up the passenger area...any time you replace a battery or loose your charge, the HVAC module will need to be reset...Try this...
Remove your hvac fuse for 10 sec - reinstall fuse. Start engine "DO NOT TOUCH ANYTHING FOR 3 MINUTES" Recalibration of module will accure when power is lost (fuse pulled, battery changed or died) If hvac reset did not work you have a trouble code - reset BCM There are two ways to reset your body control module Go to the GENERAL Remove BOTH battery cables (for the sake of CAUTION remove air bag fuse and wait 5 MINUTES) Hold both cables together for 1 minute - drains KAM (keep alive memory). Put everything back together Start the engine "DO NOT TOUCH ANYTHING FOR 3 MINUTES" If you have no broken parts - system not default (normal operation)

If that works it just saved you 600 dollars...dealer costs to repair.

Good Luck...please rate me a fixya.

SOURCE: Air conditioner blows hot air after 30 seconds on

I have had this problem. I am not a mechanic...so to correct the issue temporarily, I simply turn off the car and restart. This has worked everytime for me. In extreme cases, I think you can also remove the AC fuse and start the car, which will also reset the computer. I also think that by taking the climate control off the "AUTO" setting has worked in the past.

SOURCE: no heat of drivers side blows cold air while

Replace the door blend actuator behind glove box, approx $150 for part, Everyone I know with dual control on the silverado's have this problem.

SOURCE: 2004 GMC Canyon with 9000

Did you recently install a third party stereo?