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 G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 330 (ACCESSORY POWER SOCKET)DIAGNOSTIC INFORMATION AND PROCEDURESPOWER OUTLET RECEPTACLE INOPERATIVECOMPONENT TESTING
2008 Chevrolet Chevy Express G3500, Van Passenger Extended
Component Testing
2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Component Testing
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Accessory Power Outlet
- Ignition OFF, remove the accessory power outlet.
- Test for greater than 1 megohm between the phase A circuit terminal 6 and the phase B circuit terminal 3.
- If less than the specified range, replace the accessory power outlet.
- Test for less than 1 ohm between the following terminals:
- The phase A circuit terminal 6, and the hot terminal
- The phase B circuit terminal 3, and the neutral terminal
- If greater than the specified range, replace the accessory power outlet.
- Test for infinite resistance between the ignition voltage circuit terminal 4 and the signal circuit terminal 1.
- If not the specified value, replace the accessory power outlet.
- Connect an AC-powered device to the accessory power outlet.
- Test for less than 1 ohm between the ignition voltage circuit terminal 4 and the signal circuit terminal 1.
- If greater than the specified range, replace the accessory power outlet.
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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.