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HOMESERVICE MANUALSCHEVROLET2007SUBURBAN C1500, 5.3 0REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1921 (WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - ELECTRONIC STEERING CONTROL MODULE X2 THROUGH MEMORY SEAT MODULE)COMPONENT CONNECTOR END VIEWSHVAC CONTROL MODULE X3 (CJ3)
2007 Chevrolet Suburban C1500, 5.3 0

HVAC Control Module X3 (CJ3)

2007 Chevrolet Suburban C1500, 5.3 0SECTION HVAC Control Module X3 (CJ3)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: HVAC Control Module X3 (CJ3) Connector End View
GM1715228Courtesy of GENERAL MOTORS CORP.
HVAC Control Module X3 (CJ3)

Pin Wire Circuit Function
1 - - Not Used
2 0.35 YE/BK 713 Defrost/Heater Mode Valve Position Sensor Signal
3 - - Not Used
4 0.35 GY/BK 754 Blower Motor Speed Control
5-9 - - Not Used
10 0.35 GY 598 5-Volt Reference
11 - - Not Used
12 0.35 L-BU 733 Air Temperature Door Position Signal
13 0.35 D-BU 1646 Auxiliary Air Temperature Door Position Signal
14 0.35 WH 2622 Evaporator Temperature Signal
15 0.35 TN 2273 Mode Door Control
16 0.35 D-BU 1199 Air Temperature Door Control
17 0.35 D-GN 1614 Recirculation Door Control
18 0.35 WH/BK 1236 Auxiliary Air Temperature Door Control
19 0.35 TN 552 Low Reference
20 0.35 YE 1791 Low Reference
Connector Part Information
  • Harness Type: Instrument Panel
  • OEM Connector: 15491304
  • Service Connector: 15126710
  • Description: 20-Way F USCAR 0.64 Series (GY)
Terminal Part Information
  • Terminal/Tray: SAITS-A03T-M064/14
  • Core/Insulation Crimp: P/P
  • Release Tool/Test Probe: J-38125-215/J-35616-64B (L-BU)
RENDER: 1.0x

NO RELATED

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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.