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 MANUALSCHEVROLET2001CHEVY EXPRESS G3500, VAN PASSENGER EXTENDED, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 9 (BODY CONTROL MODULES)DIAGNOSTIC TESTSDTC B2964: KEY IN IGNITION CIRCUIT HIGHCIRCUIT DESCRIPTION
2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 F
Circuit Description
2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 FSECTION Circuit Description
WARNING: This page is about a different car, the 2002 Chevrolet Monte Carlo, 2002 Chevrolet Impala, 2001 Chevrolet Monte Carlo, and 2001 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
The body control module (BCM) uses a key in ignition input in order to control certain features in the vehicle. These features are in the following systems:
- Content Theft Deterrent, if equipped
- Audible Warnings
- Automatic Door Locks
The BCM detects a key in the ignition when the signal circuit is low.
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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.