Rear defogger circuit for Chevrolet Cab & Chassis Silverado 3500 HD (2008-2011)

6.6L EXCEPT 6.6L, 4.3L 4.3L BLK WIRE EXCEPT 6.6L 6.6L HOT AT ALL TIMES HVAC CONTROL MODULE LOGIC MANUAL A/C AUTOMATIC A/C POWER DISTRIBUTION SYSTEM PPL REAR DEFOG FUSE 50 FUSE 47 REAR DEFOG RELAY REAR DEFOGGER IND REAR DEFOGGER SWITCH REAR WINDOW DEFOGGER GRID RED WIRE RED/BLK WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT WIRE