Transfer case circuit, 2-speed manual for GMC Cab & Chassis Sierra 3500 HD (2008-2012)

4.3L 4.8L, 5.3L, 4.3L DIESEL 6.0L, 6.2L 43 44 57 44 28 27 GMLAN BUS + GMLAN BUS - AUX HVAC-IGN FUSE 48 FUSE 45 AXLE SW SIG BLK WIRE BLK/WHT WIRE COMPUTER DATA LINES SYSTEM DK GRN WIRE ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) FRONT AXLE ACTUATOR (ON FRONT AXLE ASSEMBLY) GAS DIESEL GRY/BLK WIRE HOT W/ RUN/CRNK RELAY ENERGIZED IGN IGN LOGIC INSTRUMENT PANEL CLUSTER (IPC) LOGIC PNK WIRE TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TRANS IGN 1 FUSE 19 FUSE 13 TRANSFER CASE SHIFT CONTROL SWITCH (ON TOP LEFT OF TRANSFER CASE) UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT)