I've had slide problems in the past & they can be a major pain, although usually easily fixed. If your getting a clicking or one click sound upon activating the button that usually means one of two things, a stuck slide caused by maybe alot of rain & the rubber gasket sticking to the side wall or a faulty relay switch. In my situation I've had both. Try your manual slide crank to free the sticking situation, if that don't work it's probably the other, a faulty switch. If your not getting the clicking sound it's electrical. Usually it takes two people to find the problem, one to press the button & the other to listen for the clicking.
__________________
Joe & Carolyn, Venice, FL.
2011 Laredo TT 297RL
2011 GMC Sierra Denali 2500 HD 4X4, Duramax Diesel/Allison Transmission, 3.73 Gears, Reese WD with two sway bars. Dometic 3000KW Generator.