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 MANUALSCHEVROLET2012CHEVY EXPRESS G2500, VAN PASSENGER, 4.8L ENG VIN AREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 820 (WIRING SYSTEMS AND POWER MANAGEMENT - DTC B1370 TO DTC B1475)DTC B1441COMPONENT TESTING
2012 Chevrolet Chevy Express G2500, Van Passenger, 4.8L Eng VIN A
Component Testing
2012 Chevrolet Chevy Express G2500, Van Passenger, 4.8L Eng VIN ASECTION Component Testing
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.
Ignition Switch
Using the Resistance Test below, check the resistance between the pins of the ignition switch listed in each switch position listed.
- If any reading is other than specified, replace the ignition switch.
Resistance Test
| Ignition Switch Position | Pins 2 and 1 | Pins 2 and 3 | Pins 2 and 5 | Pins 2 and 6 | Pins 5 and 6 |
|---|---|---|---|---|---|
| Off Key Out | Infinite | Infinite | Infinite | Infinite | Infinite |
| Off Key IN | Infinite | Infinite | < 5.0 ohms | Infinite | Infinite |
| Accessory | Infinite | < 5.0 ohms | Infinite | Infinite | Infinite |
| Run | < 5.0 ohms | < 5.0 ohms | Infinite | Infinite | < 5.0 ohms |
| Start | < 5.0 ohms | Infinite | Infinite | Infinite | 1275-1325 ohms |
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.