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OEM#:13580788 73-Way Female MX123 34566 Series, Color Black

These Pinouts are for GAS engines (EXCEPT LY6)

J1 Connector or X1

Pin Wire Circuit Function
1 0.35 OG/BK 1786 Park/Neutral Signal
2 0.5 GY/BK 1694 4WD Low Signal (NQG/NP2)
3 0.5 TN/WH 1695 Axle Switch Signal (NQG/NP2)
4-8 -- -- Not Used
9 0.5 L-BU/WH 6311 Brake Switch Signal
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
14-15 -- -- Not Used
16 0.35 PU 1589 Fuel Level Sensor Signal - Primary
17 -- -- Not Used
18 0.5 D-BU 5985 Accessory Wakeup Serial Data
19 0.5 PK 439 Ignition 1 Voltage
20 0.5 RD/WH 440 Battery Positive Voltage
21-22 -- -- Not Used
23 0.35 PU 1272 Low Reference - APP Sensor Pin A
24 0.35 D-GN 890 Fuel Tank Pressure Sensor Signal
25-26 -- -- Not Used
27 0.5 TN/BK 2501 High Speed GMLAN Serial Data Bus (-)
28 0.5 TN/BK 2500 High Speed GMLAN Serial Data Bus (+)
29 0.35 D-BU 1161 APP Sensor 1 Signal - APP Sensor Pin E
30 0.35 BN 1271 Low Reference - APP Sensor Pin F
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
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 0.5 TN 2760 Low Reference
36 0.35 TN 1274 5-Volt Reference 1 - APP Sensor Pin C
37 0.5 TN/BK 472 IAT Sensor Signal - MAF Pin D
38 0.5 TN 2760 Low Reference - MAF Pin E (for IAT)
39-40 -- -- Not Used
41 0.5 YE 492 MAF Sensor Signal - MAF Pin A
42-46 -- -- Not Used
47 0.5 PK/BK 1339 Ignition 1 Voltage
48 -- -- Not Used
49 0.5 TN 1671 JO2S Low Signal Bank 2 Sensor 2
50 0.35 D-GN/WH 465 Fuel Pump Relay Control - Primary
51 0.35 TN 1465 Fuel Pump Relay Control - Secondary
52 0.5 YE/BK 625 Starter Enable Relay Control
53-55 -- -- Not Used
56 0.35 WH/BK 1164 5-Volt Reference 2 - APP Sensor Pin D
57 0.35 YE/BK 1827 Vehicle Speed Signal
58 -- -- Not Used
59 0.35 YE 5991 Powertrain Relay Coil Control
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)
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 2 Sensor 1
66-67 -- -- Not Used
68 0.35 BN/WH 419 MIL Control - "Service Engine Soon" Computer supplies GROUND to turn on light
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)
0.5 PU/WH 821 VSS High Signal (NQF/NQG/NP2)
72 0.5 L-GN/BK 822 VSS Low Signal (NQF/NQG/NP2)
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 (EXCEPT 4.3L v6 and LY6)

J2 Connector or 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
23-25 -- -- 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 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
45-49 -- -- 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
54-55 -- -- 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