HVAC Control Module X3

2008 Pontiac Grand Prix BaseSECTION HVAC Control Module X3
WARNING: This page is about a different car, the 2008 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: HVAC Control Module X3 Connector End View
GM1664552Courtesy of GENERAL MOTORS CORP.
Connector Part Information 
  • OEM: 31410-1201
  • Service: 15126710
  • Description: 20-Way F USCAR 0.64 Series (GY)
Terminal Part Information 
  • Pins: 1-4, 10-13, 15-18, 20
  • Terminal/Tray: 7116-4618-02
  • Core/Insulation Crimp: P/P
  • Release Tool/Test Probe: See Terminal Repair Kit
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 Left Air Temperature Door Control
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 Auxiliary Air Temperature Door Position Signal
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

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.

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.