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 MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 308 (SUPPLEMENTAL INFLATABLE RESTRAINT SYSTEM - DEACTIVATION PROCEDURES)DISABLING & ACTIVATING AIR BAG SYSTEMCLASSICDISABLING SYSTEM
1999 GMC Forward Control 5.7 R, Automatic
Disabling System
1999 GMC Forward Control 5.7 R, AutomaticSECTION Disabling System
WARNING: This page does not describe the selected car, but rather 63 other vehicles, including the 2004 Suzuki Swift +, 2004 Pontiac Vibe, 2004 Pontiac Sunfire, 2004 Pontiac Montana, and 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
- Before proceeding, follow air bag service precautions. See SERVICE PRECAUTIONS
. Turn front wheels to straight-ahead position. Turn ignition switch to LOCK position and remove key from ignition switch. Remove the AIR BAG Fuse from the left side I/P wiring harness junction block (3) located on the far left side of the dash. See Fig 1
.
- Zone 3 - Remove the Connector Position Assurance (CPA) clip from the inflatable restraint steering wheel module coil connector (1) located above the wiring harness junction block. Disconnect the steering wheel module coil connector (1). See Fig 1 .
- Zone 5 - Remove the Connector Position Assurance (CPA) clip (2) from the inflatable restraint connector (1) located above the wiring harness junction block. Disconnect the SIR connector (1). See Fig 1 .
- Zone 9 - To disable Sensing and Diagnostic Module (SDM) located in SIR Zone 9, disconnect zones 3 & 5.
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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.