2011 Cadillac Escalade EXTFACTORY OEM SERVICE PROCEDURE

Body Control Module (BCM) C1

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Fig 1: Body Control Module (BCM) C1 Connector End View
GM1664495Courtesy of GENERAL MOTORS CORP.
Body Control Module (BCM) C1 Connector Parts Information

Connector Part Information 
  • OEM: 15482789
  • Service: 88988838
  • Description: 27-Way F Receptacle 0.64 2.8 (L-GN)
Terminal Part Information 
  • Terminal/Tray: SNAC3-A021T-M0.64/20
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: 12094429/J-35616-64B (L-BU)
Body Control Module (BCM) C1 Connector Terminal Identification

Pin Wire Color Circuit No. Function
1 - - Not Used
2 PK 1020 Ignition 0 Voltage
3 GY 1884 Cruise Control Switch Signal
4 WH 530 5-Volt Reference
5 L-GN 1715 Windshield Wiper Switch High Signal
6 L-GN 6818 Steering Wheel Control Switch Signal
7 - - Not Used
8 TN/BK 6009 Low Reference
9 L-BU 1714 Windshield Wiper Switch Low Signal
10-13 - - Not Used
14 PK 3 Ignition 1 Voltage
15 D-GN 663 Hazard Switch Left Turn Signal
16 TN 664 Hazard Switch Right Turn Signal
17 PK 1444 12-Volt Reference
18 YE 525 Headlamp Dimmer Switch Signal
19 WH 111 Hazard Switch Signal
20 PU 5526 Tap Up/Tap Down Switch Signal (MYC)
21 BN 4 Ignition 1 Voltage
22 - - Not Used
23 L-BU 553 Tow/Haul Switch Signal
24 PK 94 Windshield Washer Switch Signal
25 YE 307 Headlamp Flash to Pass Signal
26 TN/WH 816 A/T Shift Lock Solenoid Supply Voltage
27 - - Not Used
Factory Service Tools

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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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