SYS.OK|MANUAL.DB● LIVE
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 (CJ2)
2007 Chevrolet Suburban C1500, 5.3 0

HVAC Control Module X3 (CJ2)

2007 Chevrolet Suburban C1500, 5.3 0SECTION HVAC Control Module X3 (CJ2)
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 (CJ2) Connector End View
GM2498539Courtesy of GENERAL MOTORS CORP.
HVAC Control Module X3 (CJ2)

Pin Wire Circuit 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 5-Volt Reference
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 Auxiliary Air Temperature Door Position Signal (C69)
14 0.5 D-BU 204 A/C Low Pressure Sensor Signal (HP2)
0.35 WH 2622 Evaporator Temperature Signal (except HP2)
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 (C69)
19 0.5 TN 914 Low Reference (HP2)
20 0.35 YE 1791 Low Reference
Connector Part Information
  • Harness Type: Instrument Panel
  • OEM Connector: 13782500
  • Service Connector: 13578571
  • Description: 20-Way F USCAR 0.64 Series (GY)
Terminal Part Information
  • Terminated Lead: 13575550
  • Release Tool: J-38125-559
  • Diagnostic Test Probe: J-35616-16 (L-GN)
  • Terminal/Tray: 15445905/23
  • Core/Insulation Crimp: J/J
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.