Chevrolet Tahoe II (1999-2006) yel Wiring diagrams

ABS FUSE ANTI-LOCK IND BLK WIRE BLK/WHT WIRE BRAKE FLUID LEVEL SWITCH (2500 SERIES) (ON LEFT SIDE OF BRAKE FLUID RESERVOIR) BRAKE IND BRAKE PRESSURE DIFFERENTIAL SWITCH (1500 SERIES) (BELOW MASTER CYLINDER) BRN WIRE BRN/WHT WIRE DEL TORQUE DK GRN WIRE DK GRN/WHT WIRE ELECTRONIC BRAKE CONTROL MODULE (EBCM) (ON LEFT REAR FRAME RAIL) EXCEPT SEO GRY WIRE HOT AT ALL TIMES HOT IN RUN LEFT I/P FUSE BLOCK (BEHIND LOWER LEFT SIDE OF DASH) BRAKE FUSE HOT IN RUN OR START IGN E FUSE IGNITION 3 VOLTAGE LEFT FRONT SENSOR (-) RIGHT FRONT SENSOR (+) DELIVERED TORQUE ILLUM LAMP INSTRUMENT CLUSTER LEFT FRONT WHEEL SPEED SENSOR LOGIC LT BLU WIRE LT GRN/BLK WIRE NCA WIRE ORG/BLK WIRE PNK WIRE POWERTRAIN OR ENGINE CONTROL MODULE (PCM OR ECM) (AT LEFT FRONT OF ENG COMPT) PPL PPL 1500: BRAKE PRESS SENS SIG 2500: BRAKE FLUID LEVEL SW PPL DATA LINK CONNECTOR (DLC) (UNDER LEFT SIDE OF DASH, BELOW STEERING COLUMN) PPL/WHT WIRE RED WIRE REQ TORQUE RIGHT FRONT WHEEL SPEED SENSOR SEO SEO IGN FUSE STOPLAMP SWITCH (ON TOP OF BRAKE PEDAL BRACKET) TAN WIRE TAN/BLK WIRE TCC BRAKE SW TRACTION CONTROL IND TRACTION CONTROL SWITCH (IF EQUIPPED) TRANSFER CASE SHIFT CONTROL MODULE UNDERHOOD FUSE BLOCK (AT LEFT SIDE OF ENG COMPT, NEAR BATTERY) UNDERHOOD FUSE BLOCK (AT LEFT SIDE OF ENGINE COMPT, NEAR BATTERY) VEHICLE SPEED SENSOR (VSS) (RIGHT REAR OF TRANSMISSION) VSS HIGH VSS LOW VSS OUT YEL WIRE YEL/BLK WIRE

ABS/TCS CLASS 2 SERIAL DATA YAW RATE SENSOR LO REF BLK WIRE BRAKE FUSE BRAKE IN BRN WIRE DEL TORQUE DK BLU WIRE DK GRN WIRE ELECTRONIC BRAKE CONTROL MODULE (EBCM) (ON LEFT REAR FRAME RAIL) HOT AT ALL TIMES HOT IN RUN IGNITION 3 VOLT LATERAL ACCELEROMETER SIG LEFT FRONT WHEEL SPEED SENSOR LEFT I/P FUSE BLOCK (BEHIND LOWER LEFT SIDE OF DASH) LEFT REAR WHEEL SPEED SENSOR LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE ORG/BLK WIRE POWERTRAIN CONTROL MODULE (PCM) (ON LEFT FRONT OF ENG COMPT) PPL PPL/WHT WIRE PRECHARGE MOTOR LO BATTERY (+) GND PRECHARGE MOTOR HI PRECHARGE PUMP RED WIRE REQ TORQUE REQUEST TORQUE SIGNAL DELIVERED TORQUE SIGNAL RIGHT FRONT WHEEL SPEED SENSOR RIGHT REAR WHEEL SPEED SENSOR STEERING WHEEL POS MARKER PULSE SIG STEERING WHEEL POS SIG B STOPLAMP SWITCH (ON TOP OF BRAKE PEDAL BRACKET) TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (AT LEFT SIDE OF ENG COMPT, NEAR BATTERY) UNDERHOOD FUSE BLOCK (AT LEFT SIDE OF ENG COMPT, NEAR BATTERY) ABS FUSE VEHICLE SPEED SENSOR (VSS) (RIGHT REAR OF TRANSMISSION) VSES MOTOR VSES/ECAS FUSE VSS HIGH VSS LOW VSS OUTPUT WHT WIRE YEL WIRE YEL/BLK WIRE

ABS IND. ANTI-THEFT SYSTEM BATTERY BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (ON LOWER LEFT SIDE OF DASH, BELOW STEERING COLUMN) BRAKE FLUID LEVEL SWITCH (ON LEFT SIDE OF BRAKE FLUID RESERVOIR) BRAKE IND BRAKE PRESSURE DIFFERENTIAL SWITCH (BELOW MASTER CYLINDER) BRN WIRE CRUISE FUSE DATA LINK CONNECTOR (DLC) (BELOW STEERING COLUMN) DK BLU WIRE DK GRN WIRE GROUND GRY WIRE HOT IN RUN HOT IN RUN OR START IGN E FUSE INSTRUMENT PANEL CLUSTER LEFT I/P FUSE BLOCK (ON LOWER LEFT SIDE OF DASH) LO REF LOGIC LT BLU WIRE LT GRN WIRE PNK WIRE PPL SEO IGN FUSE STEERING WHEEL POS MARKER PULSE SIG STEERING WHEEL POSITION SENS SIG STEERING WHEEL POSITION SIG A STEERING WHEEL POSITION SIG B STEERING WHEEL SPEED/ POSITION SENSOR (NEAR BASE OF STEERING COLUMN) THEFT DETERRENT CONTROL MODULE TRACTION CONTROL SWITCH TRANSFER CASE SHIFT CONTROL MODULE UNDERHOOD FUSE BLOCK (AT LEFT SIDE OF ENG COMPT, NEAR BATTERY) WHT WIRE YAW RATE FREQUENCY YAW, LATERAL ACCELERATION SENSOR (UNDER RIGHT FRONT SEAT) YEL WIRE

A/C COMP CL RLY CTRL A/C COMPRESSOR CLUTCH A/C COMPRESSOR CLUTCH RELAY A/C LOW PRESSURE SWITCH (RIGHT SIDE OF ACCUMULATOR) A/C ON A/C RECIRC A/C REF PRE SENS SIG A/C REFRIGERANT PRESSURE SENSOR (IN HIGH SIDE PRESSURE LINE) AMBIENT AIR TEMPERATURE SENSOR (IN RIGHT FRONT BUMPER FILLER ASSEMBLY AUTO BLK WIRE BLK/WHT WIRE BLOWER FUSE BLOWER MOTOR (RIGHT SIDE OF DASH) BLOWER MOTOR CONTROL PROCESSOR (BEHIND RIGHT SIDE OF DASH) BRN WIRE BRN/WHT WIRE CLASS 2 SER DATA CLASS 2 SERIAL DATA DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE FAN DN FAN UP FRT DEF GROUND GROUND TEMP SEN ASS CTRL BLOWER SPEED CTRL GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT AT ALL TIMES A/C COMP FUSE HOT IN HOT IN RUN OR START IGN E FUSE HVAC 1 FUSE HVAC CONTROL MODULE (BEHIND CENTER OF DASH) HVAC/ ECAS FUSE I/P RELAY BLOCK (LEFT SIDE OF DASH) INSIDE AIR TEMPERATURE SENSOR ASSEMBLY (IN HEADLINER ABOVE DRIVER) INST LAMP DIM CTRL GROUND LEFT I/P FUSE BLOCK (LOWER LEFT SIDE OF DASH) LEFT TEMP CONTROL LO PRESS SENS SIG RT TEMP DOOR CTRL LT TEMP DOOR CTRL LOGIC LOW REF LOWER LEFT AIR TEMPERATURE SENSOR (LEFT END OF HVAC MODULE) LOWER RIGHT AIR TEMPERATURE SENSOR (BOTTOM OF HVAC MODULE) LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE MODE MODE DOOR CTRL MODE DOOR CTRL IGN 3 LOW REF B(+) OFF ORG/ WIRE POWERTRAIN CONTROL MODULE OR ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) PPL PPL/WHT WIRE RECIR RECIR DOOR CTRL RT TEMP DOOR CTRL LT TEMP DOOR CTRL RED WIRE RED/BLK WIRE RIGHT I/P FUSE BLOCK (LOWER RIGHT SIDE OF DASH) RIGHT TEMP CONTROL RUN WIRE SPEED CTRL B(+) GROUND TAN WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT, NEAR BATTERY) UPPER LEFT AIR TEMPERATURE SENSOR (BELOW DASH TRIM PANEL) UPPER RIGHT AIR TEMPERATURE SENSOR (BELOW DASH TRIM PANEL) WHT WIRE WHT/BLK WIRE YEL WIRE

11 12 PPL AMBIENT LIGHT SENS LO REF AMBIENT LIGHT SENS SIG RIGHT SUNLOAD SENSOR SIG LEFT SUNLOAD SENSOR SIG AMBIENT LIGHT SENSOR BLK WIRE BODY CONTROL MODULE (LOWER LEFT SIDE OF DASH, BELOW STEERING COLUMN) BRN WIRE CLASS 2 SERIAL DATA DK BLU WIRE DK GRN WIRE GRY WIRE LEFT AIR TEMPERATURE ACTUATOR (BOTTOM OF HVAC MODULE) LEFT SOLAR SENSOR LOGIC LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE MODE ACTUATOR (LEFT SIDE OF HVAC MODULE) PPL RECIRCULATION ACTUATOR (UPPER RIGHT OF HVAC MODULE) RIGHT AIR TEMPERATURE ACTUATOR (TOP OF HVAC MODULE) RIGHT I/P FUSE BLOCK (LOWER RIGHT SIDE OF DASH) RIGHT SOLAR SENSOR SUNLOAD SENSOR ASSEMBLY (TOP CENTER OF DASH) TAN WIRE WHT WIRE WHT/BLK WIRE YEL WIRE

AIR TEMP DOOR SIG MODE DOOR SIG AUXILIARY AIR TEMPERATURE ACTUATOR (ON AUXILIARY HVAC MODULE ASSEMBLY) AUXILIARY BLOWER MOTOR CONTROL PROCESSOR (BELOW AUXILIARY BLOWER MOTOR) AUXILIARY HVAC CONTROL MODULE (RIGHT REAR OF VEHICLE) AUXILIARY MODE ACTUATOR (ON AUXILIARY HVAC MODULE ASSEMBLY) AUXILIARYBLOWER MOTOR B(+) CLASS 2 SERIAL DATA BLK WIRE BLK/WHT WIRE BLOWER CONTROL BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK/BLU WIRE ECC FUSE FRONT AUXILIARY HVAC CONTROL ASSEMBLY FT BLOW MT SW CTRL FT MODE SW SIG GROUND GROUND AIR TEMP DOOR CTRL FT MODE SW SIG B(+) CLASS 2 SER DATA GROUND GROUND LO AIR TEMP SEN SIG BLOWER MT SP CTRL GROUND GROUND LOW REF GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN I/P RELAY BLOCK (LOWER LEFT SIDE OF DASH) IGN 3 FUSE INSIDE AIR TEMP CTRL FT BLOWER MT SW SIG LEFT I/P FUSE BLOCK (LOWER LEFT SIDE OF DASH) LOGIC LOW REF LOWER AUXILIARY AIR TEMPERATURE SENSOR (BEHIND RIGHT "C" PILLAR, FRONT OF HVAC) LT BLU WIRE ORG/ WIRE PANEL LP DIM CTRL FT AIR TEMP SW SIG POWER DISTRIBUTION SYSTEM PPL PPL/WHT WIRE RADIO FUSE REAR SEAT AUDIO (RSA) CONTROLLER RR HVAC FUSE RUN WIRE SPEED CTRL B(+) GROUND TAN WIRE TEMP CONTROL UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT, NEAR BATTERY) WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

1056 1037 INTERIOR LIGHTS SYSTEM COMPUTER DATA LINES SYSTEM 2353 1382 4040 1732 230 2240 INTERIOR LIGHTS SYSTEM INTERIOR LIGHTS SYSTEM 710 308 COMPUTER DATA LINES SYSTEM EXTERIOR LIGHTS SYSTEM 812 1140 1969 1080 1353 ANTI-THEFT SYSTEM AMBIENT LIGHT SENSOR AMBIENT LIGHT SENSOR (TOP CENTER OF DASH) ANTI-LOCK BRAKES SYSTEM INTERIOR LIGHTS SYSTEM HEADLIGHTS SYSTEM ANTI-THEFT SYSTEM HEADLIGHTS SYSTEM HORNS SYSTEM ANTI-THEFT SYSTEM SOUND SYSTEM HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (ON LOWER LEFT SIDE OF DASH, BELOW STEERING COLUMN) BRN/WHT WIRE CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA PARK LAMP SW ON SIG DEFOGGER SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE FUSE GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES I/P RELAY BLOCK INTERIOR LIGHTS SYSTEM INTERIOR LIGHTS SYSTEM LEFT I/P FUSE BLOCK LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE ORG/ WIRE ORG/BLK WIRE PNK WIRE PNK/WHT WIRE POWER DISTRIBUTION SYSTEM PPL PPL INTERIOR LAMP DEFEAT SW SIG PPL/WHT WIRE REAR DEFOG RLY CTRL RED WIRE RED/WHT WIRE SOLAR SENSOR SOLAR SENSOR SUNLOAD SENSOR (ON CENTER OF DASH, NEAR DEFROST DEFLECTORS) TAN WIRE TAN/BLK WIRE TBC BATT FUSE TOW/HAUL SW SIG TOW/HAUL SWITCH UNDERHOOD FUSE BLOCK W/ AUTOMATIC A/C W/ MANUAL A/C WHT WIRE YEL WIRE

A/C COMP CL RLY CTRL A/C COMPRESSOR CLUTCH A/C COMPRESSOR CLUTCH RELAY A/C LOW PRESSURE SWITCH (RIGHT SIDE OF ACCUMULATOR) A/C ON SWITCH A/C RECIRC A/C REF PRE SENS SIG A/C REFRIGERANT PRESSURE SENSOR (IN HIGH SIDE PRESSURE LINE) BLK WIRE BLK/WHT WIRE BLOWER FUSE BLOWER MOTOR (UNDER RIGHT SIDE OF DASH) BLOWER MOTOR CONTROL SWITCH BLOWER MOTOR RELAY BLOWER MOTOR RESISTOR ASSEMBLY (ON HVAC MODULE, NEAR BLOWER MOTOR) BRN WIRE BRN/WHT WIRE CLASS 2 SER DATA CLASS 2 SERIAL DATA DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE FRT DEF GRY WIRE HOT AT ALL TIMES HOT AT ALL TIMES A/C COMP FUSE HOT IN HOT IN RUN OR START IGN E FUSE HTR A/C FUSE HVAC 1 FUSE HVAC CONTROL MODULE (BEHIND CENTER OF DASH) HVAC/ ECAS FUSE I/P RELAY BLOCK (LEFT SIDE OF DASH) INST LAMP DIM CTRL GROUND LEFT I/P FUSE BLOCK (LOWER LEFT SIDE OF DASH) LEFT TEMP CONTROL LOGIC LOW REF LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE MODE CONTROL MODE DOOR CTRL MODE DOOR CTRL IGN 3 LOW REF B(+) OFF OFF BLOW MT CTRL LO PRESS SENS SIG RT TEMP DOOR CTRL LT TEMP DOOR CTRL ORG/ WIRE POWERTRAIN CONTROL MODULE OR ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) PPL RECIR DOOR CTRL RT TEMP DOOR CTRL LT TEMP DOOR CTRL RECIRC SWITCH RED WIRE RED/BLK WIRE RIGHT I/P FUSE BLOCK (LOWER RIGHT SIDE OF DASH) RIGHT TEMP CONTROL RUN WIRE TAN WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT, NEAR BATTERY) WHT WIRE WHT/BLK WIRE YEL WIRE

BLK WIRE BODY CONTROL MODULE (LOWER LEFT SIDE OF DASH, BELOW STEERING COLUMN) BRN WIRE CLASS 2 SERIAL DATA DK BLU WIRE DK GRN WIRE LEFT AIR TEMPERATURE ACTUATOR (BOTTOM OF HVAC MODULE) LOGIC LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE MODE ACTUATOR (LEFT SIDE OF HVAC MODULE) RECIRCULATION ACTUATOR (UPPER RIGHT OF HVAC MODULE) LOGIC RIGHT AIR TEMPERATURE ACTUATOR (TOP OF HVAC MODULE) RIGHT I/P FUSE BLOCK (LOWER RIGHT SIDE OF DASH) TAN WIRE WHT/BLK WIRE YEL WIRE

58 59 SERIAL DATA SERIAL DATA BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (LOWER LEFT SIDE OF DASH, BELOW STEERING COLUMN) BODY RELAY BLOCK (UNDER LEFT SIDE OF DASH) DATA DATA LINK CONNECTOR (BELOW LEFT SIDE OF DASH) PPL DK GRN WIRE GRY WIRE HOT AT ALL TIMES HOT IN RUN, START INSTRUMENT PANEL CLUSTER KEY LT GRN WIRE MAGNET LOCK CYLINDER ORG/ WIRE PASSLOCK SENSOR (INTERNAL TO STEERING COLUMN) PNK IGN PWR WIRE PNK WIRE POWERTRAIN CONTROL MODULE (ON LEFT FRONT OF ENGINE COMPT) PPL RED/WHT WIRE SECURITY SENSOR SENSOR PWR BATTERY GROUND SENSOR REF SERIAL DATA SENSOR SIG SERIAL DATA GROUND SPLICE TAMPER SENSOR TBC BATT FUSE TBC IGN 1 FUSE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENG COMPT) YEL WIRE