Quick question. On my light/indicator panel there is a switch that says Blk 1 or Blk 2. As far as I know there is only 1 Black Water tank (based on the fact there is only 1 dump valve!!). When I move the switch, I get either an indication for a full tank (4 LEDs) or an empty one (0). I always dump the black tank - so I know it it is empty right now. What is the switch for??????? Am I missing a dump valve??
Roselyn and Darrell
2007.5 Silverado LT/EFI Live Tuned Duramax/6Spd Allison/Banks Ram Air with Super Scoop/Edge CTS Gauges/Air Lift Load Lifter 5000 Ultimate Air Springs
2014 335ss Cruiser Provincial