For 1990-2009 cars

Connector 1: | Powertrain Control Module (PCM) C1
Connector 2: | Powertrain Control Module (PCM) C2
Connector 3: | Powertrain Control Module (PCM) C3 (MU3)

### Powertrain Control Module (PCM) C1

#### Connector Part Information

- OEM: 15480017
- Service: 88953346
- Description: 56-Way F Micro 64 Sealed (BU)

#### Terminal Part Information

- Terminal/Tray: See Terminal Repair Kit
- Core/Insulation Crimp: See Terminal Repair Kit
- Release Tool/Test Probe: See Terminal Repair Kit

#### Powertrain Control Module (PCM) C1

Pin | Wire Color | Circuit No. | Function
--- | --- | --- | ---
1 | TN/BK | 2500 | High Speed GMLAN Serial Data (+)
2 | TN | 2501 | High Speed GMLAN Serial Data (-)
3-5 | -- | -- | Not Used
6 | D-GN/WH | 459 | A/C Compressor Clutch Relay Control
7 | BN | 1271 | Low Reference
8 | PU | 1272 | Low Reference
9 | -- | -- | Not Used
10 | D-BU | 473 | High Speed Cooling Fan Relay Control
11 | -- | -- | Not Used
12 | PU | 1589 | Fuel Level Sensor Signal
13 | PK/BK | 5293 | Ignition 1 Voltage
14 | L-BU | 6118 | IAT 2 Sensor Signal
15 | -- | -- | Not Used
16 | D-GN | 1049 | ECM/PCM/VCM Class 2 Serial Data
17 | GY | 2700 | 5-Volt Reference - 1
18 | BN | 4 | Accessory Voltage
19 | PK/BK | 1039 | Ignition 1 Voltage
20 | RD/WH | 840 | Battery Positive Voltage
21 | -- | -- | Not Used
22 | WH | 1310 | EVAP Canister Vent Solenoid Control
23 | -- | -- | Not Used
24 | D-GN | 890 | Fuel Tank Pressure Sensor Signal
25 | -- | -- | Not Used
26 | OG/BK | 380 | A/C Refrigerant Pressure Sensor Signal
27 | D-BU | 1161 | APP Sensor 1 Signal
28 | -- | -- | Not Used
29 | TN | 2759 | Low Reference
30 | WH/BK | 1164 | 5-Volt Reference - B
31 | -- | -- | Not Used
32 | L-BU | 20 | Stop Lamp Switch Signal
33 | -- | -- | Not Used
34 | PK | 2014 | Coolant Pump Relay Control
35-36 | -- | -- | Not Used
37 | D-GN/WH | 465 | Fuel Pump Relay Control
38 | BN | 5069 | Powertrain Relay Control
39 | -- | -- | Not Used
40 | BN/WH | 419 | MIL Control
41 | L-BU | 1162 | APP Sensor 2 Signal
42 | -- | -- | Not Used
43 | TN | 1274 | 5-Volt Reference - 1
44-45 | -- | -- | Not Used
46 | PU | 420 | TCC Brake Switch/Cruise Control Release Signal
47 | GY | 2709 | 5-Volt Reference - 1
48 | YE | 447 | Starter Relay Coil Control
49-50 | -- | -- | Not Used
51 | D-GN | 335 | Low Speed Cooling Fan Relay Control
52 | -- | -- | Not Used
53 | BN/WH | 379 | CPP Switch Signal
54 | D-GN | 1433 | PNP/Clutch Start Switch Signal
55 | -- | -- | Not Used
56 | BK/WH | 2751 | Ground

### Powertrain Control Module (PCM) C2

#### Connector Part Information

- OEM: 15468092
- Service: 88953274
- Description: 73-Way F GT 280 Micro 64 Sealed (BK)

#### Terminal Part Information

- Terminal/Tray: See Terminal Repair Kit
- Core/Insulation Crimp: See Terminal Repair Kit
- Release Tool/Test Probe: See Terminal Repair Kit

#### Powertrain Control Module (PCM) C2

Pin | Wire Color | Circuit No. | Function
--- | --- | --- | ---
1 | RD | 225 | Generator Turn On Signal
2 | D-GN | 485 | TP Sensor 1 Signal
3 | -- | -- | Not Used
4 | GY | 596 | 5-Volt Reference - 1
5 | GY | 2704 | 5-Volt Reference - 1
6 | GY | 2701 | 5-Volt Reference - 1
7 | PU | 486 | TP Sensor 2 Signal
8 | D-GN | 6291 | 5-Volt Reference - 2
9 | L-BU/BK | 1688 | 5-Volt Reference - 2
10-15 | -- | -- | Not Used
16 | PU | 6413 | Low Reference
17 | YE | 573 | CKP Sensor [1] Signal
18 | PU | 574 | Low Reference
19 | -- | -- | Not Used
20 | D-GN/WH | 6292 | Low Reference
21 | PK/BK | 632 | Low Reference
22-24 | -- | -- | Not Used
25 | TN/WH | 1669 | HO2S Low Signal Bank 1 Sensor (2)
26 | BN/WH | 633 | CMP Sensor Signal
27-28 | -- | -- | Not Used
29 | GY | 1724 | Boost Control Solenoid Control
30 | OG/BK | 469 | Low Reference
31 | -- | -- | Not Used
32 | TN | 1667 | HO2S Low Signal Bank 2 Sensor (1)
33 | BK | 1744 | Fuel Injector (1) Control
34 | -- | -- | Not Used
35 | YE | 410 | ECT Sensor Signal
36 | BK/WH | 1704 | Low Reference
37 | GY | 6337 | MAP Sensor Signal
38 | L-GN | 432 | SCIP Sensor Signal
39 | BK | 2752 | Low Reference
40 | BN/WH | 6405 | IC 1 Control
41 | YE | 492 | MAF Sensor Signal
42 | D-GN/WH | 6407 | IC 4 Control
43 | BK/WH | 1423 | HO2S Heater Low Control Bank 1 Sensor (2)
44 | -- | -- | Not Used
45 | GY | 23 | Generator Field Duty Cycle Signal
46 | PU/WH | 1668 | HO2S High Signal Bank 1 Sensor (2)
47 | -- | -- | Not Used
48 | PU | 1666 | HO2S High Signal Bank 2 Sensor (1)
49-50 | -- | -- | Not Used
51 | TN | 472 | IAT Sensor Signal
52 | BK | 2761 | Low Reference
53 | L-GN/BK | 1745 | Fuel Injector 2 Control
54 | L-BU/BK | 844 | Fuel Injector 4 Control
55 | PK/BK | 1746 | Fuel Injector 3 Control
56-57 | -- | -- | Not Used
58 | D-GN | 676 | HO2S Heater High Control Bank 1 Sensor (1)
59 | D-BU/WH | 6406 | IC 3 Control
60 | L-BU/WH | 6408 | IC 2 Control
61-63 | -- | -- | Not Used
64 | BK | 2760 | Low Reference
65 | BN | 582 | TAC Motor Control - 2
66 | YE | 581 | TAC Motor Control - 1
67 | -- | -- | Not Used
68 | D-BU | 496 | Knock Sensor (1) Signal
69 | GY | 1716 | Knock Sensor Signal
70-72 | -- | -- | Not Used
73 | BK/WH | 451 | Ground

### Powertrain Control Module (PCM) C3 (MU3)

#### Connector Part Information

- OEM: 15468091
- Service: 88953347
- Description: 56-Way F Micro 64 Sealed (GY)

#### Terminal Part Information

- Terminal/Tray: See Terminal Repair Kit
- Core/Insulation Crimp: See Terminal Repair Kit
- Release Tool/Test Probe: See Terminal Repair Kit

#### Powertrain Control Module (PCM) C3 (MU3)

Pin | Wire Color | Circuit No. | Function
--- | --- | --- | ---
1-9 | -- | -- | Not Used
10 | TN | 891 | Boost Gage Signal
11-14 | -- | -- | Not Used
15 | TN/BK | 231 | Oil Pressure Switch Signal
16-21 | -- | -- | Not Used
22 | WH/BK | 2932 | 5-Volt Reference - 1
23-30 | -- | -- | Not Used
31 | GY/BK | 433 | BARO Sensor Signal
32-35 | -- | -- | Not Used
36 | OG/BK | 6014 | Low Reference
37 | D-GN/WH | 428 | EVAP Canister Purge Solenoid Control
38-43 | -- | -- | Not Used
44 | PU | 401 | VSS Low Signal
45 | YE | 400 | VSS High Signal
46-56 | -- | -- | Not Used