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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN CARGO EXTENDED, 5.7 R, L31/KL8REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 668 (BODY CONTROL SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESON-BOARD DIAGNOSTIC FEATURESINPUT TESTING
2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8
Input Testing
2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8SECTION Input Testing
WARNING: This page is about a different car, the 2003 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
- Make sure the BCM is in self-test and you have retrieved DTCs.
- The BCM enters the input test mode after it repeats the DTC series for the third time.
- If no DTCs are stored, the BCM enters this mode immediately.
- The BCM sounds the chime and flashes the seat belts indicator once for each activation of the following inputs:
- The reading lamp switches
- The door lock cylinders
- The door ajar switches
- The driver seat belt switch
- The interior door lock switches
- The driver information display switches
- The headlamp switch
- The IP compartment lamp switch
- The rear compartment lamp switch
- The sunshade illuminated mirrors
- The turn signal switch
- The trip calculator switches
- The shock sensors
- The keyless entry requests for lock/unlock
- If the BCM does not sound the chime and illuminate the seat belt indicator when an input is activated, the input circuit is malfunctioning.
Refer to the affected subsystem diagnostic system check.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.