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 MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1438 (COMPONENT LOCATIONS & COMPONENT CONNECTOR END VIEWS)COMPONENT CONNECTOR END VIEWSHEATED OXYGEN SENSOR (HO2S) BANK 1, SENSOR 1

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6

Heated Oxygen Sensor (HO2S) Bank 1, Sensor 1

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Heated Oxygen Sensor (HO2S) Bank 1, Sensor 1

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Heated Oxygen Sensor (HO2S) Bank 1, Sensor 1 Connector End View

Courtesy of GENERAL MOTORS CORP.

Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1

Pin	Wire	Circuit	Function
A	0.5 PU/WH	3110	HO2S Reference Voltage (Bank 1 Sensor 1) (LP1/LY7)
A	0.5 TN/WH	3111	HO2S Low Reference (Bank 1 Sensor 1) (LLT)
B	0.5 PU/WH	3110	HO2S Reference Voltage (Bank 1 Sensor 1) (LLT)
B	0.5 TN/WH	3111	HO2S Low Reference (Bank 1 Sensor 1) (LP1/LY7)
C	0.8 PK/BK	5293	Powertrain Main Relay Fused Supply (4)
D	0.75BK/WH	3113	HO2S Heater Low Control - Bank 1 Sensor 1

Connector Part Information

OEM: 12160482
Service: See Catalog
Description: 4-Way F Metri-Pack 150 Series, Sealed (BK)

Terminal Part Information

Terminal/Tray: 12048074/2
Core/Insulation Crimp: E/1
Release Tool/Test Probe: 12094429/J-35616-14 (GN)

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.