Below are the ECM Connectors for 2008 vortec 5.3L harness. Should be similar for 4.8L 6.2L applications.
BLOCKS HIGHLIGHTED LIKE THIS, ARE WIRES THAT ARE NEEDED, AND GO TO EXTERNAL CONNECTION FOR STAND ALONE I have also highlighted the 6 wires used to connect to the gas pedal. PAY ATTENTION, for whatever reason, TRUCK and CAMARO have two pins swapped on gas pedal, D and F
BLOCKS HIGHLIGHTED LIKE THIS, ARE WIRES THAT CAN BE REMOVED FROM PCM CONNECTORS, NOT NEEDED. Note: Removing all of these will result in a non-emissions friendly harness. If requirements are for 4 oxygen sensors, EVAP system, then you will not want to remove those components.
WIRES THAT ARE NOT HIGHLIGHTED REMAIN UN TOUCHED. THEY WILL GO DIRECTLY FROM ECM TO A PLUG, (SENSOR, SWITCH, DEVICE ETC.)
| OEM#:13580788 73-Way Female MX123 34566 Series, Color Black | |||||
|
|||||
| These Pinouts are for GAS engines V8 | |||||
| J1 Connector or X1 | |||||
| Pin | Wire | Circuit | Function | ||
| 1 | 0.35 OG/BK | 1786 | Park/Neutral Signal | goes to transmission range switch ground signal | |
| 2 | 0.5 GY/BK | 1694 | 4WD Low Signal (NQG/NP2) | some harnesses has a pin plug in ecm connector | |
| 3 | 0.5 TN/WH | 1695 | Axle Switch Signal (NQG/NP2) | some harnesses has a pin plug in ecm connector | |
| 4 | -- | -- | Not Used | ||
| 5 | -- | -- | Not Used | ||
| 6 | -- | -- | Not Used | ||
| 7 | -- | -- | Not Used | ||
| 8 | -- | -- | Not Used | ||
| 9 | 0.5 L-BU/WH | 6311 | Brake Switch Signal | to underhood fuse block P3, wire also goes to TCM, both hook to tcc brake switch at brake pedal, 12v+ hot with brakes applied. Open when NOT on the brakes. | |
| 10 | 0.5 PU/WH | 1668 | HO2S High Signal Bank 1 Sensor 2 | ||
| 11 | 0.5 TN/WH | 1669 | HO2S Low Signal Bank 1 Sensor 2 | ||
| 12 | 0.35 OG/BK | 380 | A/C Refrigerant Pressure Sensor Signal (CJ2/C67) | ||
| 13 | 0.35 TN | 5514 | Low Reference (4.8L/5.3L6.0L/6.2L with CJ2/C67) - A/C Refrigerant Pressure Sensor Pin 1 | ||
| 14 | -- | -- | Not Used | ||
| 15 | -- | -- | Not Used | ||
| 16 | 0.35 PU | 1589 | Fuel Level Sensor Signal - Primary | ||
| 17 | D-BU/WT | -- | High Speed Cooling Fan Relay Control | UNDERHOOD B5 | |
| 18 | 0.5 D-BU | 5985 | Accessory Wakeup Serial Data | ||
| 19 | 0.5 PK | 439 | Ignition 1 Voltage ECM 12v+ KEY HOT | UNDERHOOD P5 | |
| 20 | 0.5 RD/WH | 440 | Battery Positive Voltage ECM 12v+ BATT HOT | UNDERHOOD D3 | |
| 21 | -- | -- | Not Used | ||
| 22 | -- | -- | Not Used | ||
| 23 | 0.35 PU | 1272 | Low Reference - APP Sensor Pin A | X109 C1 | |
| 24 | 0.35 D-GN | 890 | Fuel Tank Pressure Sensor Signal | ||
| 25 | -- | -- | Not Used | ||
| 26 | -- | -- | Not Used | ||
| 27 | 0.5 TN/BK | 2501 | High Speed GMLAN Serial Data Bus (-) | GOES TO TCM | |
| 28 | 0.5 TN/BK | 2500 | High Speed GMLAN Serial Data Bus (+) | GOES TO TCM | |
| 29 | 0.35 D-BU | 1161 | APP Sensor 1 Signal - APP Sensor Pin E | X109 C4 | |
| 30 | 0.35 BN | 1271 | Low Reference - APP Sensor Pin F | X109 C6 | |
| 31 | 0.35 TN/BK | 6049 | Low Reference - Fuel Tank Pressure Sensor Pin A, Fuel Pump Sender Assembly Pin B | ||
| 32 | 0.35 L-BU | 1162 | APP Sensor 2 Signal - APP Sensor Pin B | X109 C2 | |
| 33 | 0.35 GY | 2709 | 5-Volt Reference 1 - Fuel Tank Pressure Sensor Pin C | ||
| 34 | 0.35 GY/WH | 2700 | 5-Volt Reference 1 - A/C Refrigerant Pressure Sensor Pin 2 | ||
| 35 | -- | -- | Not Used | ||
| 36 | 0.35 TN | 1274 | 5-Volt Reference 1 - APP Sensor Pin C | X109 C3 | |
| 37 | 0.5 TN/BK | 472 | IAT Sensor Signal - MAF Pin D | ||
| 38 | 0.5 TN | 2760 | Low Reference - MAF Pin E (for IAT) | ||
| 39 | -- | -- | Not Used | ||
| 40 | -- | -- | Not Used | ||
| 41 | 0.5 YE | 492 | MAF Sensor Signal - MAF Pin A | ||
| 42 | -- | -- | Not Used | ||
| 43 | -- | -- | Not Used | ||
| 44 | -- | -- | Not Used | ||
| 45 | -- | -- | Not Used | ||
| 46 | -- | -- | Not Used | ||
| 47 | 0.5 PK/BK | 1339 | Ignition 1 Voltage ECM 12v+ KEY HOT | UNDERHOOD N1 | |
| 48 | -- | -- | ADD PIN HERE FOR TACH SIGNAL OUTPUT | ||
| 49 | 0.5 TN | 1671 | HO2S Low Signal Bank 2 Sensor 2 | ||
| 50 | 0.35 D-GN/WH | 465 | Fuel Pump Relay Control - Primary | UNDERHOOD P4 | |
| 51 | 0.35 TN | 1465 | Fuel Pump Relay Control - Secondary | empty on 5.3 no pin plug | |
| 52 | 0.5 YE/BK | 625 | Starter Enable Relay Control | UNDERHOOD C5 | |
| 53 | -- | -- | Not Used | ||
| 54 | -- | -- | Not Used | ||
| 55 | -- | -- | Not Used | ||
| 56 | 0.35 WH/BK | 1164 | 5-Volt Reference 2 - APP Sensor Pin D | X109 C5 | |
| 57 | 0.35 YE/BK | 1827 | VSS Output to ABS System 128k ??? | wire goes to plug at end of transmission harness leg, next to rear o2 | |
| 58 | 0.5 D-GN | 335 | Low Speed Cooling Fan Relay Control | UNDERHOOD A1 | |
| 59 | 0.35 YE | 5991 | Powertrain Relay Coil Control | UNDERHOOD P2 this wire USUALLY power a relay, that inturn powers up all the PNK/BLK wires at the underhood fuse block connector, I just wire all PINK and PNK/BLK wires together to a KEY HOT source | |
| 60 | -- | -- | Not Used | ||
| 61 | 0.5 WH | 1310 | EVAP Canister Vent Solenoid Control | ||
| 62 | -- | -- | Not Used | ||
| 63 | 0.35 D-GN/WH | 459 | A/C Compressor Clutch Relay Control (CJ2/C67) | UNDERHOOD C3 | |
| 64 | 0.5 OG/WH | 3223 | HO2S Heater Low Control Bank 2 Sensor 2 | ||
| 65 | 0.5 GY/WH | 3122 | HO2S Heater Low Control Bank 1 Sensor 2 | ||
| 66 | -- | -- | Not Used | ||
| 67 | -- | -- | Not Used | ||
| 68 | 0.35 BN/WH | 419 | MIL Control - "Service Engine Soon" Computer supplies GROUND to turn on light | X109 A7 | |
| 69 | 0.5 PU | 1970 | HO2S High Signal Bank 2 Sensor 2 | ||
| 70 | 0.35 L-BU | 1937 | Secondary Fuel Level Sensor Signal | ||
| 71 | 0.35 OG/BK | 6399 | Replicated TOS Signal (without 31 Series without NQF/NQG/NP2) | GOES TO TCM | |
| 0.5 PU/WH | 821 | VSS High Signal - TO SPEED SENSOR ON MANUAL TRANS | |||
| 72 | 0.5 L-GN/BK | 822 | VSS Low Signal - TO SPEED SENSOR ON MANUAL TRANS | ||
| 73 | 3 BK/WH | 451 | Ground | ||
| OEM#:13511426 80-Way Female Receptacle 0.64 2.8 Sealed, Color Gray | |||||
|
|||||
| These pinouts are for GAS engines V8 | |||||
| J2 Connectoror X2 | |||||
| Pin | Wire | Circuit | Function | ||
| 1 | -- | -- | Not Used | ||
| 2 | 0.35 PU/WH | 6270 | 5-Volt Reference 2 - Crankshaft Position Sensor Pin C | ||
| 3 | 0.35 GY | 2701 | 5-Volt Reference 2 - Throttle Body Pin E | ||
| 4 | -- | -- | Not Used | ||
| 5 | 0.5 BN | 582 | TAC Motor Control - 2 - Throttle Body Pin A | ||
| 6 | 0.5 YE | 581 | TAC Motor Control - 1 - Throttle Body Pin B | ||
| 7 | -- | -- | Not Used | ||
| 8 | 0.5 D-GN/WH | 428 | EVAP Canister Purge Solenoid Control | ||
| 9 | 0.5 GY | 5493 | Cylinder Shutoff Solenoid Control (3) (except 4.8L) | ||
| 10 | 0.5 D-BU | 5491 | Cylinder Shutoff Solenoid Control (1) (except 4.8L) | ||
| 11 | 0.5 OG | 5494 | Cylinder Shutoff Solenoid Control (4) (except 4.8L) | ||
| 12 | 0.5 GY/WH | 3113 | HO2S Heater Low Control - Bank 1 Sensor 1 | ||
| 13 | 0.5 L-GN | 3212 | HO2S Heater Low Control - Bank 2 Sensor 1 | ||
| 14 | 0.5 L-GN/BK | 5492 | Cylinder Shutoff Solenoid Control (2) (except 4.8L) | ||
| 15 | -- | -- | Not Used | ||
| 16 | 0.35 PU | 5284 | Camshaft Actuator Solenoid Control (6.0L/6.2L) Pin 2 | ||
| 17 | 0.5 D-BU/WH | 878 | Fuel Injector 8 Control | ||
| 18 | 0.5 TN/WH | 845 | Fuel Injector 5 Control | ||
| 19 | 0.5 YE/BK | 846 | Fuel Injector 6 Control | ||
| 20 | 0.5 TN | 1744 | Fuel Injector 1 Control | ||
| 21 | 0.5 YE | 410 | ECT Sensor Signal - ECT Pin B | ||
| 22 | 0.5 TN | 2761 | Low Reference - ECT Pin A | ||
| 23 | -- | -- | Not Used | ||
| 24 | -- | -- | Not Used | ||
| 25 | -- | -- | Not Used | ||
| 26 | 0.8 D-BU | 496 | KS 1 Signal - KS1 Pin A | ||
| 27 | 0.8 GY | 1716 | KS 1 Signal - KS1 Pin B | ||
| 28 | -- | -- | Not Used | ||
| 29 | 0.8 L-BU | 1876 | KS 2 Signal - KS2 Pin A | ||
| 30 | 0.8 GY | 2303 | KS 2 Signal - KS2 Pin B | ||
| 31 | -- | -- | Not Used | ||
| 32 | 0.5 GY | 23 | Generator Field Duty Cycle Signal | ||
| 33 | 0.5 BN | 1174 | Oil Level Switch Signal (Early Production) | ||
| 34 | 0.35 BK | 2755 | Low Reference - Engine Oil Pressure Sensor Pin 1 | ||
| 35 | 0.35 TN | 2752 | Low Reference - Throttle Body Pin C | ||
| 36 | -- | -- | Not Used | ||
| 37 | 0.5 L-GN/BK | 1745 | Fuel Injector 2 Control | ||
| 38 | 0.5 PK/BK | 1746 | Fuel Injector 3 Control | ||
| 39 | 0.5 L-BU/BK | 844 | Fuel Injector 4 Control | ||
| 40 | 0.5 OG/BK | 877 | Fuel Injector 7 Control | ||
| 41 | 0.35 GY/WH or GY ??? | 2705 | 5-Volt Reference 1 - Engine Oil Pressure Sensor Pin 2 | ||
| 42 | -- | -- | Not Used | ||
| 43 | 0.35 GY | 2704 | 5-Volt Reference 1 - MAP Sensor Pin C | ||
| 44 | 0.35 D-BU | 6259 | 5-Volt Reference 1 - Camshaft Position Sensor Pin A | ||
| 45 | -- | -- | Not Used | ||
| 46 | -- | -- | Not Used | ||
| 47 | -- | -- | Not Used | ||
| 48 | -- | -- | Not Used | ||
| 49 | -- | -- | Not Used | ||
| 50 | 0.35 TN/WH | 331 | Oil Pressure Sensor Signal | ||
| 51 | -- | -- | Not Used | ||
| 52 | 0.35 TN | 2199 | Low Reference (6.0L/6.2L) - Camshaft Position Actuator Sol Valve Pin 1 | ||
| 53 | 0.35 OG/BK | 469 | Low Reference - MAP Sensor Pin A | ||
| 54 | -- | -- | Not Used | ||
| 55 | -- | -- | Not Used | ||
| 56 | 0.5 TN | 1664 | HO2S Low Signal - Bank 1 Sensor 1 | ||
| 57 | 0.5 PU/WH | 1665 | HO2S High Signal - Bank 1 Sensor 1 | ||
| 58 | 0.35 L-GN | 432 | MAP Sensor Signal - MAP Sensor Pin B | ||
| 59 | 0.5 PU | 1666 | HO2S High Signal - Bank 2 Sensor 1 | ||
| 60 | 0.5 TN | 1667 | H02S Low Signal - Bank 2 Sensor 1 | ||
| 61 | 0.5 BN | 25 | Charge Indicator Signal | ||
| 62 | -- | -- | Not Used | ||
| 63 | 0.35 PU | 486 | TP Sensor 2 Signal - Throttle Body Pin F | ||
| 64 | 0.35 D-BU/WH | 6265 | CMP Sensor Signal - Camshaft Position Sensor Pin C | ||
| 65 | 0.35 D-GN | 485 | TP Sensor 1 Signal - Throttle Body Pin D | ||
| 66 | 0.35 BN | 6266 | Low Reference - Camshaft Position Sensor Pin B | ||
| 67 | -- | -- | Not Used | ||
| 68 | 0.35 WH/BK | 6271 | CKP Sensor Signal - Crankshaft Position Sensor Pin A | ||
| 69 | 0.35 GY/BK | 6272 | Low Reference - Crankshaft Position Sensor Pin B | ||
| 70 | 0.5 PU | 2121 | IC 1 Control | ||
| 71 | 0.5 PU/WH | 2128 | IC 8 Control | ||
| 72 | 0.5 OG | 2127 | IC 7 Control | ||
| 73 | 0.5 OG/WH | 2122 | IC 2 Control | ||
| 74 | 0.5 L-BU/WH | 2126 | IC 6 Control | ||
| 75 | 0.5 D-GN | 2125 | IC 5 Control | ||
| 76 | 0.5 D-GN/WH | 2124 | IC 4 Control | ||
| 77 | 0.5 L-BU | 2123 | IC 3 Control | ||
| 78 | 0.5 BN | 2129 | Low Reference - Coil Connector Pin E Odd Bank | ||
| 79 | 0.5 BN/WH | 2130 | Low Reference - Coil Connector Pin E Even Bank | ||
| 80 | -- | -- | Not Used | ||