I don't have a drain but that $300 pos is messed up. I have to tap on the face to get the back light to come on. It has gotten worse and worse and my gauge isn't even a year old. I have heard of this problem over on silveradoss.com . I can't remember what they came up with for a solution though. Later
Dave
2003 Silverado SS here's where my money went...Radix @ 9psi, Vortec IC tank, Oversized Heat exchanger, ASM LT Headers, Suncoast Ram Air hood, Airaid intake, Trailblazer Torque converter, Full billet servos, Zippy kit, cat-free, Flowmaster muffler, Gaylord Speedstur tonneau, 3/4 drop with Belltech spindles and leafs, Sirius conversion & MTX thunderform sub box. 05 e-fans coming soon!