For 1990-2009 cars

Table 1: | Engine Control Module - X1(LY7)
Table 2: | Engine Control Module - X2 (LY7)

#### Engine Control Module - X1(LY7)

Connector Part Information |
--- | ---
Pin | Wire Colour | Wire Size | Function
X1-1 | L-GN | 0.75 | Cam Phaser Exhaust 1 Signal
X1-2 | PU | 0.75 | Cam Phaser Intake 1 Signal
X1-3 | -- | -- | Not Used
X1-4 | YE/BK | 0.75 | Fuel Injector 6 Control
X1-5 | D-GN/WH | 0.75 | EVAP Canister Purge Solenoid Control
X1-6 | -- | -- | Not Used
X1-7 | OG/BU | 0.5 | Intake 1 Cam Position Sensor Signal
X1-8 | -- | -- | Not Used
X1-9 | PU | 0.5 | Exhaust 2 Cam Position Sensor Signal
X1-10 | OG/WH | 0.5 | Generator Turn On Signal
X1-11 | BN | 0.5 | Oil Level Switch Signal
X1-12 | L-BU/WH | 0.75 | VIM PWM Signal
X1-13 | PK | 0.5 | Low Reference
X1-14 | -- | -- | Not Used
X1-15 | GY | 0.75 | 5-Volt Reference
X1-16 | -- | -- | Not Used
X1-17 | -- | -- | Not Used
X1-18 | -- | -- | Not Used
X1-19 | -- | -- | Not Used
X1-20 | -- | -- | Not Used
X1-21 | -- | -- | Not Used
X1-22 | -- | -- | Not Used
X1-23 | -- | -- | Not Used
X1-24 | YE | 0.75 | TAC Motor Control - 1
X1-25 | WH/BK | 0.75 | Cam Phaser Exhaust 2 Signal
X1-26 | PK/BK | 0.75 | Fuel Injector 3 Control
X1-27 | -- | -- | Not Used
X1-28 | BN/WH | 0.75 | Fuel Injector 5 Control
X1-29 | -- | -- | Not Used
X1-30 | PU/WH | 0.5 | Generator Field Duty Cycle Signal
X1-31 | -- | -- | Not Used
X1-32 | -- | -- | Not Used
X1-33 | YE/RD | 0.5 | Intake 2 Cam Position Sensor Signal
X1-34 | D-GN | 0.5 | Exhaust 1 Cam Position Sensor Signal
X1-35 | YE/BU | 0.5 | CKP Sensor 1 Signal
X1-36 | -- | -- | Not Used
X1-37 | -- | -- | Not Used
X1-38 | -- | -- | Not Used
X1-39 | GY | 0.5 | 5-Volt Reference
X1-40 | GY | 0.5 | 5-Volt Reference
X1-41 | PK/BK | 0.75 | Low Reference
X1-42 | -- | -- | Not Used
X1-43 | BN/RD | 0.5 | Low Reference
X1-44 | BK | 0.5 | Low Reference
X1-45 | PU/WH | 0.5 | 5-Volt Reference
X1-46 | PU | 0.5 | Low Reference
X1-47 | -- | -- | Not Used
X1-48 | BN | 0.75 | TAC Motor Control - 2
X1-49 | OG/BK | 0.75 | Cam Phaser Intake 2 Signal
X1-50 | L-BU/BK | 0.75 | Fuel Injector 4 Control
X1-51 | BN/BK | 0.75 | Fuel Injector 1 Control
X1-52 | L-GN/BK | 0.75 | Fuel Injector 2 Control
X1-53 | -- | -- | Not Used
X1-54 | -- | -- | Not Used
X1-55 | PU | 0.5 | IC 1 Control
X1-56 | L-BU | 0.5 | IC 3 Control
X1-57 | GN/RD | 0.5 | IC 5 Control
X1-58 | -- | -- | Not Used
X1-59 | D-BU | 0.5 | Knock Sensor 1 Signal
X1-60 | BN | 0.5 | Low Reference
X1-61 | BN/WH | 0.5 | Oil Pressure Sensor Signal
X1-62 | -- | -- | Not Used
X1-63 | -- | -- | Not Used
X1-64 | -- | -- | Not Used
X1-65 | -- | -- | Not Used
X1-66 | -- | -- | Not Used
X1-67 | BN/YE | 0.5 | HO2S Low Signal (Bank 1 Sensor 1)
X1-68 | WH | 0.5 | HO2S Output Pump Current (Bank 1 Sensor 1)
X1-69 | OG | 0.5 | HO2S Input Pump Current (Bank 2 Sensor 1)
X1-70 | PU | 0.5 | HO2S High Signal (Bank 2 Sensor 1)
X1-71 | -- | -- | Not Used
X1-72 | L-GN | 0.75 | HO2S Low Signal (Bank 2 Sensor 1)
X1-72 | -- | -- | Not Used
X1-73 | -- | -- | Not Used
X1-74 | -- | -- | Not Used
X1-75 | -- | -- | Not Used
X1-76 | -- | -- | Not Used
X1-77 | -- | -- | Not Used
X1-78 | PU | 0.5 | Low Reference
X1-79 | OG/WH | 0.5 | IC 2 Control
X1-80 | D-GN/WH | 0.5 | IC 4 Control
X1-81 | L-BU/WH | 0.5 | IC 6 Control
X1-82 | YE/GN | 0.5 | ECT Sensor Signal
X1-83 | GY | 0.5 | Low Reference
X1-84 | L-BU | 0.5 | Knock Sensor 2 Signal
X1-85 | GN/YE | 0.5 | Oil Temperature Sensor Signal
X1-86 | -- | -- | Not Used
X1-87 | -- | -- | Not Used
X1-88 | BN/BK | 0.5 | Low Reference
X1-89 | PU | 0.5 | TP Sensor 2 Signal
X1-90 | D-GN | 0.5 | TP Sensor 1 Signal
X1-91 | L-GN | 0.5 | HO2S Input Pump Current (Bank 1 Sensor 1)
X1-92 | PU/WH | 0.5 | HO2S High Signal (Bank 1 Sensor 1)
X1-93 | BN/RD | 0.5 | HO2S Low Signal (Bank 2 Sensor 1)
X1-94 | PU/WH | 0.5 | HO2S Output Pump Current (Bank 2 Sensor 1)
X1-95 | -- | -- | Not Used
X1-96 | GY/WH | 0.75 | HO2S Heater Low Control (Bank 1 Sensor 1)

#### Engine Control Module - X2 (LY7)

Connector Part Information |
--- | ---
Pin | Wire Colour | Wire Size | Function
X2-1 | BK | 0.5 | Ground
X2-2 | BK | 0.5 | Ground
X2-3 | PK/BU | 0.75 | Ignition 1 Voltage
X2-4 | BK | 0.5 | Ground
X2-5 | PK/BK | 0.8 | Ignition 1 Voltage
X2-6 | PK/BU | 0.75 | Ignition 1 Voltage
X2-7 | GY/WH | 0.75 | HO2S Heater Low Control (Bank 1 Sensor 2)
X2-8 | -- | -- | Not Used
X2-9 | BN/YE | 0.5 | Low Reference
X2-10 | D-GN/WH | 0.5 | Fuel Pump Relay Control (Primary)
X2-11 | BN/GN | 0.5 | Low Reference
X2-12 | -- | -- | Not Used
X2-13 | YE | 0.5 | MAF Sensor Signal
X2-14 | -- | -- | Not Used
X2-15 | BU/WH | 0.5 | APP Sensor 1 Signal
X2-16 | BN/WH | 0.5 | CPP Switch Signal
X2-17 | D-GN | 0.5 | Park/Neutral/Clutch Safety Switch Signal
X2-18 | L-GN | 0.5 | Backup Lamp Switch Signal
X2-19 | -- | -- | Not Used
X2-20 | OG/WH | 0.75 | HO2S Heater Low Control (Bank 2 Sensor 2)
X2-21 | BN/WH | 0.5 | MIL Control
X2-22 | BN/WH | 0.5 | Low Reference
X2-23 | BN/GN | 0.5 | HO2S Low Signal (Bank 1 Sensor 2)
X2-24 | BN/RD | 0.5 | HO2S Low Signal (Bank 2 Sensor 2)
X2-25 | L-BU | 0.5 | APP Sensor 2 Signal
X2-26 | L-BU | 0.5 | Fuel Level Sensor Signal (1)
X2-27 | -- | -- | Not Used
X2-28 | -- | -- | Not Used
X2-29 | -- | -- | Not Used
X2-30 | -- | -- | Not Used
X2-31 | -- | -- | Not Used
X2-32 | -- | -- | Not Used
X2-33 | -- | -- | Not Used
X2-34 | BN | 0.5 | Low Reference
X2-35 | GY | 0.5 | 5-Volt Reference
X2-36 | PU | 0.5 | Fuel Level Sensor Signal (2)
X2-37 | -- | -- | Not Used
X2-38 | PU | 0.5 | HO2S High Signal (Bank 1 Sensor 2)
X2-39 | OG/BK | 0.5 | A/C Refrigerant Pressure Sensor Signal
X2-40 | -- | -- | Not Used
X2-41 | D-BU | 0.5 | Ignition Switch Wake Up Signal
X2-42 | BN/BK | 0.5 | High Speed GMLAN Serial Data Bus+
X2-43 | -- | -- | Not Used
X2-44 | -- | -- | Not Used
X2-45 | BU/BK | 0.5 | High Speed Cooling Fan Relay Control
X2-46 | D-GN | 0.5 | Low Speed Cooling Fan Relay Control
X2-47 | PU | 0.5 | Low Reference
X2-48 | BN/YE | 0.5 | 5-Volt Reference
X2-49 | WH/BK | 0.5 | 5-Volt Reference
X2-50 | BN/RD | 0.5 | IAT Sensor Signal
X2-51 | PU | 0.5 | HO2S High Signal (Bank 2 Sensor 2)
X2-52 | WH/BU | 0.5 | Stop Lamp Switch Signal
X2-53 | -- | -- | Not Used
X2-54 | PK | 0.5 | Ignition 1 Voltage
X2-55 | BN | 0.5 | High Speed GMLAN Serial Data Bus-
X2-56 | OG/BK | 0.75 | Battery Positive Voltage
X2-57 | YE | 0.5 | Starter Relay Coil Control
X2-58 | BN | 0.5 | Main Relay Control