There are a couple of possibilities that may cause your problem & it will require some inspection.
PIT3164B: Fuse 42 Opens When using The Power Windows Or Sporadic Door Locks - keywords electrical fuse glass inoperative link lock unlock open switch UBEC window - (May 8, 2009)
|Subject:||Fuse 42 Opens When Using The Power Windows or Sporadic Door Locks|
|Models:||2004-2009 Chevrolet Colorado Pick Up|
|2004-2009 GMC Canyon Pick Up|
This PI was superseded to update model years. Please discard PIT3164A.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Power window fuse (#42 in the UBEC) opens at times. There are two possible scenarios.
Scenario #1) Fuse 42 opens when using either the drivers or passengers front window or sporadic operation of the door locks.
Scenario #2) When closing all windows at the same time, fuse 42 may open.
There are two possible solutions for this concern:
#1) Inspect the harness in each door for a chafe at the door check link. Repair any harness and reroute to prevent future contact or chafe. #2) This is a design characteristic. No repairs should be attempted. To reduce the likelihood of this situation from occurring, do not continue to operate all the windows completely open/closed at the same time and running the motor against the stops. This situation will produce the maximum current draw and can increase the chances for the fuse to open.
Note: Fuse 42 in the UBEC will be the fuse that may open if the windows are operated in this manor.