Power mirrors not working on GMC Chevy Silverado 1500 Suburban 1999-2007 replace side mirror switch 

This may work if you have no control at all, but it is worth
a try since you don't have to spend money to try this.
(If this does not work it is likely your whole switch is faulty)
BUY REPLACMENT SWITCH ONLINE IT IS ONLY 10 TO 15 DOLLARS AUTOPARTS STORES ARE OVERPRICED
FITMENT:For 2002 For Cadillac Escalade ;2002 For FOR Chevy Avalanche 1500 2500;2000-2002 For FOR Chevy Silverado 1500 1500HD 2500 2500HD 3500 For SUBURBAN 1500 2500;2000-2002 For GMC Sierra 1500 2500;2000-2002 For GMC Yukon XL 1500 2500 Power Mirror Switch.