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HOMESERVICE MANUALSCHEVROLET2006SUBURBAN K2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 999 (HVAC SYSTEM - AUTOMATIC)COMPONENT LOCATORHVAC CONNECTORSHVAC CONTROL MODULE X3
2006 Chevrolet Suburban K2500, 6.0 U

HVAC Control Module X3

2006 Chevrolet Suburban K2500, 6.0 USECTION HVAC Control Module X3
WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: HVAC Control Module X3 Connector End View
GM1715228Courtesy of GENERAL MOTORS CORP.
HVAC Control Module X3 Connector Parts Information

Connector Part Information 
  • OEM: 15491304
  • Service: See Catalog
  • Description: 20-Way F USCAR 0.64 Series (GY)
Terminal Part Information 
  • Terminal/Tray: 7116-4618-02/14
  • Core/Insulation Crimp: P/P
  • Release Tool/Test Probe: J-38125-215/J-35616-64B (L-BU)
HVAC Control Module X3 Connector Terminal Identification

Pin Wire Color Circuit No. Function
1 0.35 TN 518 Lower Left Air Temperature Sensor Signal
2 0.35 YE/BK 713 Defrost/Heater Mode Valve Position Sensor Signal
3 0.35 PU 1838 Recirculation Door Position Signal
4 0.35 GY/BK 754 Blower Motor Speed Control
5-9 - - Not Used
10 0.35 GY 598 Reference Voltage
11 0.35 TN 520 Lower Right Air Temperature Sensor Signal
12 0.35 L-BU 733 Air Temperature Door Position Signal
13 0.35 D-BU 1646 Right Air Temperature Door Position Signal
14 - - Not Used
15 0.35 TN 2273 Mode Door Control
16 0.35 D-BU 1199 Left Air Temperature Door Control
17 0.35 D-GN 1614 Recirculation Door Control
18 0.35 WH/BK 1236 Right Air Temperature Door Control
19 - - Not Used
20 0.35 YE 1791 Low Reference
RENDER: 1.0x

NO RELATED

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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.