Chevrolet Silverado 1500 (2000-2012) tow/ haul switch Wiring diagrams

1-2 SHIFT SOLENOID VALVE 2-3 SHIFT SOLENOID (2-3 SS) VALVE 3-2 SHIFT SOLENOID (3-2 SS) VALVE 4.3L AUTOMATIC TRANSMISSION (LEFT FRONT OF ENG COMPT, NEAR FAN SHROUD) AUTOMATIC TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR AUTOMATIC TRANSMISSION PRESSURE MANUAL VALVE POSITION SWITCH AUTOMATIC TRANSMISSION SHIFT LEVER BLK WIRE BODY CONTROL MODULE (BCM) (LOWER LEFT SIDE OF DASH) BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) EXCEPT 4.3L GRY WIRE HAUL HI SPD GMLAN IND INPUT SPEED SENSOR (ISS) INSTRUMENT PANEL CLUSTER LO GM GMLAN LOGIC LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE MIL IND. CTRL MIL SIG NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK 9 10 WIRE PNK WIRE PPL PRESSURE CONTROL (PC) SOLENOID VALVE RED WIRE REPLICATED TOS SIGN REV TAN WIRE TAN/BLK WIRE TORQUE CONVERTER CLUTCH (TCC) SOLENOID VALVE TORQUE CONVERTER CLUTCH PULSE WIDTH MODULATION (TCC PWM) SOLENOID VALVE TOW TOW/ HAUL SWITCH TOW/HAUL SW SIG WHT WIRE YEL WIRE YEL/BLK WIRE

1-2 SHIFT SOLENOID VALVE 2-3 SHIFT SOLENOID (2-3 SS) VALVE 3-2 SHIFT SOLENOID (3-2 SS) VALVE 4.3L AUTOMATIC TRANSMISSION (LEFT FRONT OF ENG COMPT, NEAR FAN SHROUD) AUTOMATIC TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR AUTOMATIC TRANSMISSION PRESSURE MANUAL VALVE POSITION SWITCH AUTOMATIC TRANSMISSION SHIFT LEVER BLK WIRE BODY CONTROL MODULE (BCM) (LOWER LEFT SIDE OF DASH) BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) EXCEPT 4.3L GRY WIRE HAUL HI SPD GMLAN IND INPUT SPEED SENSOR (ISS) INSTRUMENT PANEL CLUSTER LO GM GMLAN LOGIC LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE MIL IND. CTRL MIL SIG NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK 9 10 WIRE PNK WIRE PPL PRESSURE CONTROL (PC) SOLENOID VALVE RED WIRE REPLICATED TOS SIGN REV TAN WIRE TAN/BLK WIRE TORQUE CONVERTER CLUTCH (TCC) SOLENOID VALVE TORQUE CONVERTER CLUTCH PULSE WIDTH MODULATION (TCC PWM) SOLENOID VALVE TOW TOW/ HAUL SWITCH TOW/HAUL SW SIG WHT WIRE YEL WIRE YEL/BLK WIRE

1-2 SHIFT SOLENOID VALVE 2-3 SHIFT SOLENOID (2-3 SS) VALVE 3-2 SHIFT SOLENOID (3-2 SS) VALVE 4.3L AUTOMATIC TRANSMISSION (LEFT FRONT OF ENG COMPT, NEAR FAN SHROUD) AUTOMATIC TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR AUTOMATIC TRANSMISSION PRESSURE MANUAL VALVE POSITION SWITCH AUTOMATIC TRANSMISSION SHIFT LEVER BLK WIRE BODY CONTROL MODULE (BCM) (LOWER LEFT SIDE OF DASH) BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) EXCEPT 4.3L GRY WIRE HAUL HI SPD GMLAN IND INPUT SPEED SENSOR (ISS) INSTRUMENT PANEL CLUSTER LO GM GMLAN LOGIC LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE MIL IND. CTRL MIL SIG NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK 9 10 WIRE PNK WIRE PPL PRESSURE CONTROL (PC) SOLENOID VALVE RED WIRE REPLICATED TOS SIGN REV TAN WIRE TAN/BLK WIRE TORQUE CONVERTER CLUTCH (TCC) SOLENOID VALVE TORQUE CONVERTER CLUTCH PULSE WIDTH MODULATION (TCC PWM) SOLENOID VALVE TOW TOW/ HAUL SWITCH TOW/HAUL SW SIG WHT WIRE YEL WIRE YEL/BLK WIRE

1-2 SHIFT SOLENOID VALVE 2-3 SHIFT SOLENOID (2-3 SS) VALVE 3-2 SHIFT SOLENOID (3-2 SS) VALVE 4.3L AUTOMATIC TRANSMISSION (LEFT FRONT OF ENG COMPT, NEAR FAN SHROUD) AUTOMATIC TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR AUTOMATIC TRANSMISSION PRESSURE MANUAL VALVE POSITION SWITCH AUTOMATIC TRANSMISSION SHIFT LEVER BLK WIRE BODY CONTROL MODULE (BCM) (LOWER LEFT SIDE OF DASH) BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) EXCEPT 4.3L GRY WIRE HAUL HI SPD GMLAN IND INPUT SPEED SENSOR (ISS) INSTRUMENT PANEL CLUSTER LO GM GMLAN LOGIC LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE MIL IND. CTRL MIL SIG NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK 9 10 WIRE PNK WIRE PPL PRESSURE CONTROL (PC) SOLENOID VALVE RED WIRE REPLICATED TOS SIGN REV TAN WIRE TAN/BLK WIRE TORQUE CONVERTER CLUTCH (TCC) SOLENOID VALVE TORQUE CONVERTER CLUTCH PULSE WIDTH MODULATION (TCC PWM) SOLENOID VALVE TOW TOW/ HAUL SWITCH TOW/HAUL SW SIG WHT WIRE YEL WIRE YEL/BLK WIRE

1-2 SHIFT SOLENOID (SS) VALVE 2-3 SHIFT SOLENOID (SS) VALVE 3-2 SHIFT SOLENOID (SS) VALVE 4.3L AUTOMATIC TRANSMISSION AUTOMATIC TRANSMISSION FLUID PRESSURE (TFP) MANUAL VALVE POSITION SWITCH AUTOMATIC TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR AUTOMATIC TRANSMISSION SHIFT LEVER BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (LOWER LEFT SIDE OF DASH) BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) EXCEPT 4.3L GRY WIRE HI SPD GMLAN INPUT SPEED SENSOR (ISS) INSTRUMENT PANEL CLUSTER (IPC) LO GM GMLAN LOGIC LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE MIL IND MIL IND. CTRL MIL SIG NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK WIRE PPL PRESSURE CONTROL (PC) SOLENOID VALVE RED WIRE REPLICATED TOS SIGN REV TAN WIRE TAN/BLK WIRE TORQUE CONVERTER CLUTCH (TCC) PULSE WIDTH MODULATION (PWM) SOLENOID VALVE TORQUE CONVERTER CLUTCH (TCC) SOLENOID VALVE TOW/ HAUL IND TOW/ HAUL SWITCH TOW/HAUL SW SIG WHT WIRE YEL WIRE YEL/BLK WIRE

1-2 SHIFT SOLENOID (SS) VALVE 2-3 SHIFT SOLENOID (SS) VALVE 4.3L AUTOMATIC TRANSMISSION AUTOMATIC TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR AUTOMATIC TRANSMISSION SHIFT LEVER BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (LOWER LEFT SIDE OF DASH) BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK GRN WIRE ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) EXCEPT 4.3L GRY WIRE HI SPD GMLAN INPUT SPEED SENSOR (ISS) INSTRUMENT PANEL CLUSTER (IPC) LO GM GMLAN LOGIC LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE MIL IND MIL IND. CTRL MIL SIG NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK WIRE PPL PRESSURE CONTROL (PC) SOLENOID VALVE RED WIRE REPLICATED TOS SIGN TAN WIRE TAN/BLK WIRE TORQUE CONVERTER CLUTCH (TCC) PULSE WIDTH MODULATION (PWM) SOLENOID VALVE TORQUE CONVERTER CLUTCH (TCC) SOLENOID VALVE TOW/ HAUL IND TOW/ HAUL SWITCH TOW/HAUL SW SIG YEL WIRE YEL/BLK WIRE