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 G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1765 (PROGRAMMING AND SETUP - ALL SYSTEMS)REPAIR INSTRUCTIONSPASSENGER PRESENCE SYSTEM PROGRAMMING AND SETUPPASSENGER PRESENCE SYSTEM PRELOAD TEST PROCEDURE
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
Passenger Presence System Preload Test Procedure
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Passenger Presence System Preload Test Procedure
WARNING: This page is about a different car, the 2009 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
- Before checking for preload in the PPS, the front passenger seat must be completely empty of all items. The presence of any items on the front passenger seat will affect this procedure.
- When the sensing and diagnostic module (SDM) starts to communicate with the PPS, the instrument panel cluster (IPC) and dash lights will begin dimming on and off. This is normal operation during this procedure and does not indicate additional system faults.
- Empty the front outboard passenger seat.
- Switch the ignition to the OFF position.
- Disconnect the scan tool for 60 seconds.
- Ignition OFF, connect scan tool and clear SIR DTCs.
- Verify no PPS or SIR DTCs exist except for preload. If any current codes are set except preload DTCs, diagnose those DTCs first.
- During the preload test the scan tool will ask if both passenger air bag indicators are illuminated. The passenger air bag indicators will only illuminate for 5 seconds.
- When the preload test completes, the scan tool may display Unable to Clear DTCs. If this message is displayed, restart the preload test from the beginning. This message does not directly indicate that a preload or module failure exists.
- With a scan tool, command the preload test procedure and follow the on screen instructions.
- If the scan tool displays Test Failed, request PPS DTCs. Refer to Passenger Presence System Displaying Code Procedure .
- If DTC 1052-1055 is present, adjust the seat bottom trim cover and massage the seat cushion to ensure no unwanted pressure is present and restart the preload test.
- When no preload DTCs are found in the PPS then clear all history DTCs in both the PPS and the SIR systems.
IMPORTANT:
If preload DTCs are set in the PPS, the SDM will set DTC B0081 when the ignition is turned ON. This code must be cleared with the ignition OFF before continuing with the preload test by doing the following:
IMPORTANT:
RENDER: 1.0x
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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.