Chevrolet Uplander I (2004-2008) Awd circuit

15 24 SERIAL DATA PCM RLY ALL WHEEL DRIVE DISABLED AXLE ACT BLK WIRE BRN WIRE COMPUTER DATA LINES SYSTEM DIFFERENTIAL CLUTCH PUMP ACTUATOR CHECK VALVE DK GRN WIRE EMIS/ AWD FUSE 22 GROUND GRY WIRE HOT AT ALL TIMES IGNITION 1 INSTRUMENT PANEL CLUSTER LOGIC LT BLU WIRE MESSAGE CENTER PNK WIRE POWERTRAIN CONTROL MODULE (LEFT SIDE OF ENGINE COMPT, IN AIR CLEANER ASSEMBLY) PWR/ TRN RELAY SERIAL DATA UNDERHOOD FUSE BLOCK (ABOVE RIGHT FRONT WHEEL WELL)