[themomonga]

I had the same kind of squeek coming from both my passenger and occationally my drivers side(2004 Colorado Z71 Crew, drove 3/04-2/05 17k miles). It nearly drove me to insanity!!!! I finally isolated it at the V where the door/roof support beam meets with the dash. I did a temp fix by jamming my air freshener in between the dash and the beam. Note: you may need to adjust the position a little before the sound goes completely away.

I have since sold off this POS and gotten the hell away from it...nothin but problems. Moved to a proven quality truck (2001 Chev Silverado Z71 LT Ext Cab)...not it is a 2001 B4 they started getting TOO cheap on the production lines! Never been happier! ;o)