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 MANUALSCHEVROLET1999EXPRESS 1/2 TON VAN V6-4.3L VIN WREPAIR AND DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - RESTRAINTS AND SAFETY SYSTEMSAIR BAG CONTROL MODULESERVICE AND REPAIRREMOVAL PROCEDURE
1999 Chevrolet Express 1/2 Ton Van V6-4.3L VIN W
Removal Procedure
1999 Chevrolet Express 1/2 Ton Van V6-4.3L VIN WSECTION Removal Procedure
1. Disable the SIR system.
2. Remove the driver seat.
3. Remove the front door stepwell mat.
4. Fold back the carpet to access the Inflatable Restraint Sensing and Diagnostic Module (SDM).
5. Remove the Connector Position Assurance (CPA) (4) from the Inflatable Restraint Sensing and Diagnostic Module (SDM) harness connector (3).
6. Disconnect the SDM harness connector (3) from the SDM.
7. Remove the SDM (2) mounting fasteners (1).
8. Remove the SDM from the vehicle (2).
Important: The following repair procedures should only be used in the event that the Inflatable Restraint Sensing and Diagnostic Module (SDM) mounting studs and/or fasteners are damaged to the extent that the SDM may no longer be properly mounted.
9. Repair the fasteners using the following procedure:
9.1. Remove the stripped nut and discard the nut.
9.2. Drill out the weld spots to the weld stud from the floor pan side, then remove and discard the stud.
9.3. Condition the floor panel attaching surface where the new stud is to be installed.
9.4. Install new weld stud GM P/N 115115602 and clamp the weld stud.
9.5. Migweld the stud at the drilled holes from above or below the floor pan (as required).
9.6. Apply body sealer GM P/N 9984248 around any exposed openings.
9.7. Install a new fastener GM P/N 11515933.
RENDER: 1.0x
NO RELATED
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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.