Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET2009TAHOE BASE, 4.8 CREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 21 (HVAC SYSTEM - MANUAL)COMPONENT LOCATORHVAC CONNECTORSHVAC CONTROL MODULE C1

2009 Chevrolet Tahoe Base, 4.8 C

HVAC Control Module C1

2009 Chevrolet Tahoe Base, 4.8 CSECTION HVAC Control Module C1

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: HVAC Control Module C1 Connector End View

Courtesy of GENERAL MOTORS CORP.

HVAC Control Module C1 Connector Parts Information

Connector Part Information

OEM: 15491305
Service: 15126709
Description: 20-Way F USCAR 0.64 Series (BN)

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 C1 Connector Terminal Identification

Pin	Wire Color	Circuit No.	Function
1-7	-	-	Not Used
8	PK	2145	Air Temperature Switch Signal - Right
9	OG	2615	Auxiliary Mode Door Signal
10	YE	2214	Auxiliary Air Temperature Door Signal
11-17	-	-	Not Used
18	GY	2599	Auxiliary Mode Door Position Signal
19	PU/WH	760	Auxiliary Blower Motor Speed Signal
20	-	-	Not Used

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.