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 MANUALSCHEVROLET1997ASTRO VAN 2WD V6-4.3L VIN WREPAIR AND DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - RESTRAINTS AND SAFETY SYSTEMSAIR BAG CONTROL MODULESERVICE AND REPAIRFRONTAL SIR SYSTEM IMPORTANT PRELIMINARY PRECAUTIONS
1997 Chevrolet Astro Van 2WD V6-4.3L VIN W
Frontal Sir System Important Preliminary Precautions
1997 Chevrolet Astro Van 2WD V6-4.3L VIN WSECTION Frontal Sir System Important Preliminary Precautions
CAUTION: Be careful when you handle a inflatable restraint Sensing Diagnostic Module (SDM). Do not strike or jolt the SDM. Before applying power to the SDM:
^ Remove any dirt, grease, etc. from the mounting surface.
^ Position the SDM horizontally on the mounting surface.
^ Point the arrow on the SDM toward the front of the vehicle.
^ Tighten all of the SDM fasteners and SDM bracket fasteners to the specified torque value.
Failure to follow the correct procedure could cause air bag deployment, personal injury, or unnecessary SIR system repairs.
CAUTION: When the vehicle interior has been exposed to extensive water intrusion, such as water leaks, window left open, driving through high water, and so forth, the Sensing and Diagnostic Module (SDM) may need to be replaced. With the Ignition OFF, inspect the area under the passenger's seat and the area around the SDM, including the carpet. If any significant soaking or evidence of significant soaking is detected, the water must be removed, water damage repaired, and the SDM and the SDM harness connector MUST be replaced. Before attempting these repairs, the SIR system must be disabled. See Air Bag(s) Arming and Disarming for instructions on how to disable the SIR system. Failure to disable the SIR system may result in air bag deployment, personal injury, or otherwise unneeded SIR system repairs.
^ Remove any dirt, grease, etc. from the mounting surface.
^ Position the SDM horizontally on the mounting surface.
^ Point the arrow on the SDM toward the front of the vehicle.
^ Tighten all of the SDM fasteners and SDM bracket fasteners to the specified torque value.
Failure to follow the correct procedure could cause air bag deployment, personal injury, or unnecessary SIR system repairs.
CAUTION: When the vehicle interior has been exposed to extensive water intrusion, such as water leaks, window left open, driving through high water, and so forth, the Sensing and Diagnostic Module (SDM) may need to be replaced. With the Ignition OFF, inspect the area under the passenger's seat and the area around the SDM, including the carpet. If any significant soaking or evidence of significant soaking is detected, the water must be removed, water damage repaired, and the SDM and the SDM harness connector MUST be replaced. Before attempting these repairs, the SIR system must be disabled. See Air Bag(s) Arming and Disarming for instructions on how to disable the SIR system. Failure to disable the SIR system may result in air bag deployment, personal injury, or otherwise unneeded SIR system repairs.
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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.