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C2 - Underhood Fuseblock 2006
Pin Wire Color Circuit No. Function
A1-A2 -- -- Not Used
A3 D-GN 59 A/C Compressor Clutch Supply Voltage (CJ2/CJ3)
A4-A6 -- -- Not Used
A7 D-GN/WH 465 Fuel Pump Relay Control - Primary
A8 OG 440 Battery Positive Voltage (MW7)
A9 PK 1339 Ignition 1 Voltage
A10 L-BU 1320 CHMSL Supply Voltage/Stop Lamp Supply Voltage (KUP)
A11      
GY 1524 Trailer Backup Lamp Supply Signal
A12 PK 439 Ignition 1 Voltage (L59)
PK 439 Ignition 1 Voltage (EVA)
B1 -- -- Not Used
B2 OG 3440 Battery Positive Voltage (8.1L/PTO)
B3 BK/WH 1695 Axle Switch Signal
BK/WH 1695 Axle Switch Signal
B4-B6 -- -- Not Used
B7 BK 550 Ground
B8 OG 440 Battery Positive Voltage
OG 440 Battery Positive Voltage
B9 PK 1039 Ignition 1 Voltage
     
B10 PK 439 Ignition 1 Voltage - MAF/IAT Sensor (Gas)
PK 439 Ignition 1 Voltage - PCM (Gas)
B11-B12 -- -- Not Used
C1-C2 -- -- Not Used
C3 D-GN/WH 459 A/C Compressor Clutch Relay Control (CJ2/CJ3)
C4-C5 -- -- Not Used
C6-C7 -- -- Not Available
C8-C9 -- -- Not Used
C10 PK 1039 Ignition 1 Voltage (Except 4.3L)(Gas)
PK 1039 Ignition 1 Voltage (Gas)
C11 -- -- Not Used
C12 PU 420 TCC Brake Switch/Cruise Control Release Signal
PU 420 TCC Brake Switch/Cruise Control Release Signal (MW7)
D1-D2 -- -- Not Used
D3 L-GN 275 Park Neutral Position Switch Park Signal
D4 -- -- Not Used
D5 RD/WH 4740 Battery Positive Voltage (10 Series Except HP2)
RD/WH 4740 Battery Positive Voltage (10 Series Except HP2)
D6-D7 -- -- Not Available
D8 PK 539 Ignition 1 Voltage - HO2S Bank 1 Sensor 1(Gas except HP2)
PK 539 Ignition 1 Voltage - HO2S Bank 2 Sensor 1(Gas except HP2)
     
     
D9 PK 1239 Ignition 1 Voltage (Gas)
     
     
D10 PK 1039 Ignition 1 Voltage (Gas)
PK 1039 Ignition 1 Voltage (Gas)
D11 PU 6 Starter Solenoid Crank Voltage (w/o HP2)
D12 YE/BK 625 Starter Enable Relay Control (Except HP2)
E1-E5 -- -- Not Used
E6 PK 1239 Ignition 1 Voltage - Fuel Injector 2 (Gas)
PK 1239 Ignition 1 Voltage - Fuel Injector 4 (Gas)
     
E7 PK 1539 Ignition 1 Voltage - HO2S - Bank 1 Sensor 2 (Gas except HP2)
PK 1539 Ignition 1 Voltage - HO2S - Bank 2 Sensor 2 (Gas except HP2)
     
     
E8-E9 -- -- Not Used
E10 PK 1239 Ignition 1 Voltage (Gas) (Except 4.3L)
PK 1239 Ignition 1 Voltage (Gas)
E11 PK 1020 Ignition 0 Voltage (A/T Except MW7)
PK 1020 Ignition 0 Voltage
E12 -- -- Not Used
F1-F2 -- -- Not Used
F3 PU 806 Crank Voltage
PU 806 Crank Voltage (MW7)
F4-F7 -- -- Not Used
F8 PK 839 Ignition 1 Voltage
F9 PK 639 Ignition 1 Voltage (GAS)
F10 PK 1020 Ignition 0 Voltage
PK 1020 Ignition 0 Voltage (MW7 or HP2)
F11 D-GN 1433 Park/Neutral Start Switch Signal (Except HP2)
     
PK 639 Ignition 1 Voltage (8.1L w/MW7)
F12 -- -- Not Used
C100 - I/P Harness to Engine Harness
Pin Wire Color Circuit No. Function
A D-BU 84 Cruise Control Set/Coast Switch Signal (KUP)
A L-BU/BK 396 Cruise Control Engaged Signal (w/o KUP)
B GY 48 CPP Switch Signal (ML6, MG5)
B PU 5526 Tap Up/Tap Down Switch Signal (MW7)
C BN 241 Ignition 3 Voltage (TP2)
D D-GN/WH 817 Vehicle Speed Signal
E D-BU 507 Wait to Start Indicator Control (Diesel)
E OG/BK 6752 Class 2 Serial Data (10 Series except HP2)
F TN 2500 High Speed GM LAN Serial Data (+) (MW7)
F TN 2501 High Speed GM LAN Serial Data (-) (MW7)
H D-GN 1049 Class 2 Serial Data
J BN/WH 419 MIL Control
K WH 121 Engine Speed Signal
L GY 397 Cruise Control ON Switch Signal (K34)
M YE 710 Class 2 Serial Data (HP2/8.1L)
M PK/WH 1101 Damping Lift/Drive Signals (Except HP2/8.1L)
N BN 241 Ignition 3 Voltage (NP1, NP2, and NP8)
P D-BU 204 A/C Low Pressure Sensor Signal (CJ2/CJ3)
R D-BU 5668 Engine On Signal (JC4)
R YE 2470 Class 2 Serial Data (MW7)
S GY/BK 87 Cruise Control Resume/Accel Switch Signal
C152 - Chassis Harness to Engine Harness
Pin Wire Color Circuit No. Function
A -- -- Not Used
B TN 1465 Fuel Pump Relay Control - Secondary - Dual Fuel Tanks (Gas)
C GY 474 5-Volt Reference (Gas)
D D-GN 890 Fuel Tank Pressure Sensor Signal (Gas)
E YE/BK 1827 Vehicle Speed Signal
F WH 1310 EVAP Canister Vent Solenoid Control (Gas)
G -- -- Not Used
H D-BU 1936 Fuel Level Sensor Signal - Secondary - Dual Fuel Tanks
J BK 470 Low Reference
K PU 1589 Fuel Level Sensor Signal - Primary (8.1L/HP2)
K PU/WH 1589 Fuel Level Sensor Signal - Primary (All Others)
L TN/BK 464 Delivered Torque Signal (NW7)
M OG/BK 463 Requested Torque Signal (NW7)
C153 - 4 Wheel Drive Harness to Engine Harness (NP1/NP2/NP8)
Pin Wire Color Circuit No. Function
A GY/BK 1694 4WD Low Signal
B BK/WH 1695 Axle Switch Signal