2004 Chevrolet Impala LSFACTORY OEM SERVICE PROCEDURE

Body Control Module C2

WARNING: This page is about a different car, the 2007 Saturn Sky. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Body Control Module C2 Connector End View
GM1376254Courtesy of GENERAL MOTORS CORP.
Body Control Module C2 Connector Part Information

Connector Part Information 
  • OEM: 15393121
  • Service: 88987848
  • Description: 72-Way F Micro-64 Unsealed (GY)
Terminal Part Information 
  • Pins:
  • Terminal: TBD
  • Core/Insulation Crimp: TBD
  • Release Tool/Test Probe: TBD
Body Control Module C2 Connector Terminal Identification

Pin Wire Color Circuit No. Function
2 TN/BK 2500 High Speed GMLAN Serial Data (+) (1)
3 YE 10 Headlamp Switch Signal
4 PU 524 Headlamp Dimmer Switch High Beam Signal
5 BN/WH 301 Park Lamp Switch On Signal
6-8 - - Not Used
9 WH 111 Hazard Switch Signal
10 TN 1576 Rear Compartment Lock Actuator Unlock
11 D-GN 264 Security Indicator Control
12 TN/WH 1455 Keyless Entry Program Enable Signal (A31)
13 - - Not Used
14 TN 28 Horn Relay Control
15 WH 103 Headlamp Switch Headlamps On Signal
16 OG 192 Front Fog Lamp Switch Signal
17 PU/WH 549 Headlamp Switch Headlamps Off Signal
18 WH 5359 5-Volt Reference
20 TN 2501 High Speed GMLAN Serial Data (-)
21-25 - - Not Used
26 D-GN 44 Instrument Panel Lamp Dimmer Switch Signal
27-30 - - Not Used
31 YE 5361 Brake Pedal Position Sensor Signal
32 - - Not Used
33 YE 317 Fog Lamp Relay Control
34-37 - - Not Used
38 D-GN 5060 Low Speed GMLAN Serial Data
39-43 - - Not Used
44 L-GN/BK 1137 DRL Ambient Light Sensor Signal
45-46 - - Not Used
47 YE/BK 1138 DRL Ambient Light Sensor Low Reference
48-50 - - Not Used
51 BN 1356 Flash To Pass Switch Signal
52-55 - - Not Used
56 WH 1390 Off/Run/Crank Voltage
57 GY 112 Windshield Wiper Switch Signal 2
58 PU 719 Low Reference
59 BN 5360 Low Reference
60 - - Not Used
61 GY 1884 Cruise Control Switch Signal
62 WH/BK 1073 Ignition Key Resistor Signal
63-65 - - Not Used
66 YE/BK 1418 Left Rear Turn Signal Switch Signal
67 D-GN/WH 1419 Right Rear Turn Signal Switch Signal
68 L-BU 292 Rear Defog Switch Signal
69 D-GN/WH 762 A/C Request Signal
70 - - Not Used
71 PU 5234 Passenger Seat Belt Indicator
72 WH 193 Rear Defog Relay Control
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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