Car Wiring Diagrams for Transfer case circuit, 2-speed manual for GMC Sierra III facelift (2015-2018)

4.3L, 6.2L, 5.3L 6.6L TURBO DIESEL 6.0L BLK WIRE COMPUTER DATA LINES SYSTEM DATA 1 (+) DK BLU WIRE ENGINE CONTROL MODULE FRONT AXLE ACT CTRL FRONT AXLE ENGAGEMENT ACTUATOR GRY/BLK WIRE HOT W/ IGNITION MAIN RELAY ENERGIZED IGN 1 VOLT J102 (6.6L TURBO DIESEL) J123 (6.6L TURBO DIESEL) J124 (EXCEPT 6.6L TURBO DIESEL) LOCK IND LOGIC LOW SIG SERIAL TRANS IGN FUSE TRANSFER CASE SHIFT CONTROL SWITCH UNDERHOOD FUSE BLOCK VIO/BLK WIRE WHT WIRE YEL/WHT WIRE