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HVAC Control Module

WARNING: This page is about a different car, the 2007 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: HVAC Control Module Connector End View
GM73156Courtesy of GENERAL MOTORS CORP.
HVAC Control Module Connector Part Information

Connector Part Information 
  • OEM: 12110088
  • Service: 12110088
  • Description: 24-Way F Micro-Pack 100 Series (GY)
Terminal Part Information 
  • Pins: A1, A3, A5-A12, B3, B8-B12
  • Terminal/Tray: 12146447/3
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12031876-1/J-35616-6 (BN)
  • Pins: B5
  • Terminal/Tray: 12146448/19
  • Core/Insulation Crimp: E/A
  • Release Tool/Test Probe: 12031876-1/J-35616-6 (BN)
HVAC Control Module Connector Terminal Identification

Pin Wire Color Circuit No. Function
A1 RD/WH 440 Battery Positive Voltage
A2 - - Not Used
A3 BN 141 Ignition 3 Voltage
A4 - - Not Used
A5 D-GN 5060 Low Speed GMLAN Serial Data
A6 D-GN 5060 Low Speed GMLAN Serial Data
A7 GY/BK 754 Blower Speed Request Signal
A8 BN 404 Upper Air Temperature Sensor Signal
A9 L-GN 405 Lower Air Temperature Sensor Signal
A10 L-GN/BK 1647 Recirculation Door Control A
A11 TN 2273 Mode Door Control A
A12 D-BU 1199 Air Temperature Door Control A
B1-B2 - - Not Used
B3 GY 8 Instrument Panel Lamp Supply Voltage
B4 - - Not Used
B5 BK/WH 651 Ground
B6-B7 - - Not Used
B8 TN 470 Low Reference
B9 TN 476 Low Reference
B10 PK/WH 1648 Recirculation Door Control B
B11 L-GN 2275 Mode Door control B
B12 YE 1791 Air Temperature Door Control B
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