Steering Column Repair: 2003 tahoe wipers, printed circuit board, motor connections

Question
when I turn the key on wipers come on and run constantly wont turn off unless I pull wiper fuse?

Answer
Hi Al:
Most often when this happens, it is a result of the wiper motor not responding to the signal sent from the switch.  The motor has a printed circuit board and relays that are supposed to shut down the sweep functions.  the only problem is there is really no way to check to see if the motor or the switch is bad as they both produce the same results...no response from the switch.
The motor is about $100, the switch is about $300.  
Check out our company website regarding replacing the switch and then decide which one you want to try.  
http://www.stolenandrecovered.com/howto/gmmulti.php

Personally, I'd reboot and clean the motor connections and see if that helps, then I'd get a reconditioned or used motor to try before I put a switch in.

Good Luck
Doug