C108 Chevrolet Silverado 3500

C108 Main Engine Harness to Engine Jumper Harness Terminal Identification (LLY/LB7) Connector Part Information 15336174 24-Way F GT 150/280 Series, Sealed (BLK) Connector Part Information 15336173 24-Way M GT 150/280 Series, Sealed (BLK) Pin Wire Color Circuit No. Function Pin Wire Color Circuit No. Function A1-A2 - - Not Used A1-A2 - - Not Used A3 DK BLU/ WHT 5763 EGR Valve Position Signal (LLY) A3 BRN/ WHT 5763 EGR Valve Position Signal (LLY) A4 BRN 5347 IA Heater Relay Control (LB7) A4 PPL 5347 IA Heater Relay Control (LB7) A5 PNK 5349 Intake Heater Diag 1 (LB7) A5 TAN 5349 Intake Heater Diag 1 (LB7) A6 WHT/BLK 2932 5-Volt Reference A6 WHT/BLK 2932 5-Volt Reference A7 ORN/BLK 1057 Low Reference A7 ORN/BLK 1057 Low Reference A8 GRY/BLK 433 BARO Sensor Signal A8 GRY/BLK 433 BARO Sensor Signal B1 DK GRN 2362 SAE J1939 Serial Data Bus- B1 DK GRN 2362 SAE J1939 Serial Data Bus- B2 - - Not Used B2 - - Not Used B3 YEL/BLK 2754 Low Reference (LLY) B3 BLK 2754 Low Reference (LLY) B4 DK BLU 5930 Turbocharger Vane Position Control Solenoid Valve High control (LLY) B4 DK BLU 5930 Turbocharger Vane Position Control Solenoid Valve High control (LLY) B5 WHT 1310 EGR Vacuum Vent Solenoid Control (LB7) (California Emissions Only) B5 WHT 1310 EGR Vacuum Vent Solenoid Control (LB7) (California Emissions Only) WHT 5931 Low Reference (LLY) WHT 5931 Low Reference (LLY) B6 DK GRN /WHT 428 EGR Throttle Valve Vacuum Solenoid Control (LB7) (California Emissions Only) B6 DK GRN /WHT 428 EGR Throttle Valve Vacuum Solenoid Control (LB7) (California Emissions Only) TAN 5929 5-Volt Reference (LLY) ORN/BLK 5929 5-Volt Reference (LLY) B7 WHT 257 EGR Valve Vacuum Solenoid Control (LB7) (California Emissions Only) B7 WHT 257 EGR Valve Vacuum Solenoid Control (LB7) (California Emissions Only) ORN/BLK 5928 Low Reference (LLY) TAN 5928 Low Reference (LLY) B8 BRN 1456 EGR Valve Vacuum Sensor Signal (LB7) (California Emissions Only) B8 BRN 1456 EGR Valve Vacuum Sensor Signal (LB7) (California Emissions Only) YEL 5775 Turbocharger Vane Position Sensor Signal (LLY) YEL 5775 Turbocharger Vane Position Sensor Signal (LLY) C1 YEL 2361 SAE J1939 Serial Data Bus+ C1 YEL 2361 SAE J1939 Serial Data Bus+ C2 - - Not Used C2 GRY/BLK 5765 Fuel Filter Pressure Switch Signal C3 PPL 2703 5-Volt Reference (LLY) C3 GRY 2703 5-Volt Reference (LLY) C4 PNK 5764 EGR Motor High Control (LLY) C4 ORN/BLK 5764 EGR Motor High Control (LLY) C5 YEL 5348 Intake Heater Diag 2 (LB7) C5 TAN 5348 Intake Heater Diag 2 (LB7) WHT 5746 EGR Motor Low Control (LLY) LT GRN /BLK 5746 EGR Motor Low Control (LLY) C6 GRY 597 5-Volt Reference C6 GRY 597 5-Volt Reference C7 ORN/BLK 469 Low Reference C7 ORN/BLK 469 Low Reference C8 LT GRN 432 Turbocharger Boost Sensor Signal C8 LT GRN 432 Turbocharger Boost Sensor Signal