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HOMESERVICE MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN PASSENGER EXTENDED, 5.0 MREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 988 (RETAINED ACCESSORY POWER)DIAGNOSTIC INFORMATION AND PROCEDURESSCAN TOOL DATA DEFINITIONSINPUT 1
2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 M

Input 1

2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 MSECTION Input 1
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2001 GMC Yukon XL, 2001 GMC Yukon, 2001 GMC Sierra, 2001 GMC Cab & Chassis Sierra, and 2001 GMC C3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Door Handle Switch

The scan tool displays the position of the door handle. The scan tool displays ACTIVE when a door handle is raised and INACTIVE with all doors closed and the door handles at rest.

Drivers Door Jamb Switch

The scan tool displays the position of the drivers door. The scan tool displays ACTIVE when the drivers door is open.

Ignition 1

The scan tool displays the position of the ignition switch. The scan tool displays ACTIVE when the ignition switch is in the RUN or CRANK position.

Ignition 3

The scan tool displays the position of the ignition switch. The scan tool displays ACTIVE when the ignition switch is in the RUN position only.

Ignition Power Mode

The scan tool displays the position of the ignition switch. The scan tool displays OFF, RUN, CRANK and UNKNOWN. The UNKNOWN display is when the BCM can not determine the position of the ignition switch (between the OFF and RUN positions).

Key-In-Ignition

The scan tool displays the position of the ignition key in the ignition switch cylinder. The scan tool displays YES when the ignition key is fully inserted into the ignition switch cylinder. The BCM uses this data in controlling the operation of the reminder chime feature.

Retained Accessory Power (RAP) Relay Feedback

The scan tool displays the state of the RAP relay. The scan tool displays ON when the BCM activates the RAP relay.

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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.