Join Date: Dec 2005
Location: Upper Central Midwest
" If you can not find it let the dealer do it under warranty. "
This is posted in the "1st Gen" Forum. . unless the OP has a 2nd Gen truck, not likely to be under warranty.
One way to possibly check and see if there is a substantial door seal leak is to turn the HVAC fan on the highest setting with the windows cranked up. Then, exit the truck and walk over to the passenger side and see if you can hear or feel an air leak somewhere.
Also, sometimes the rubber door seal can slip out of place or alignment. They are just pressed into place and held in with a friction fit or clips/fasteners. OP could try checking both the rubber door seal and also window channel seal and see if they slipped out of place or worn.
2017 2WD Colorado LT V6 CCSB Luxury & Convenience Pkgs, Black/Ashen Gray Leather, Bullet Bedliner, ARE cap.
Last edited by GraniteBlue05; 06-05-2017 at 10:55 AM.