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.DBβ LIVE
HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 289 (SUPPLEMENTAL INFLATABLE RESTRAINT SYSTEM)AIR BAG SAFETY PRECAUTIONS
1999 GMC Forward Control 5.7 R, Automatic
Air Bag Safety Precautions
1999 GMC Forward Control 5.7 R, AutomaticSECTION Air Bag Safety Precautions
WARNING: This page is about a different car, the 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
Observe the following precautions when working with SIR system:
- SDM maintains sufficient voltage to cause air bag deployment for up to one minute after ignition is turned off, battery is disconnected or fuse powering SDM is removed. Disable air bag system before working on vehicle. See DISABLING & ACTIVATING AIR BAG SYSTEMΒ .
- If vehicle interior is exposed to moisture and becomes soaked up to level of SDM, SDM and harness connector must be replaced. SDM could be activated when powered, causing air bag deployment.
- After repairs, ensure AIR BAG warning light is working properly and no system faults are indicated. See SYSTEM OPERATION CHECKΒ .
- Always wear safety glasses when servicing or handling an air bag module.
- Air bag modules must be stored in original special containers until used for service. Store in a clean, dry place, away from sources of extreme heat, sparks, or high electrical energy.
- SIR components should not be subjected to temperatures greater than 150Β°F (65Β°C).
- SIR components should not be used if they have been dropped from a height of 3 feet (0.9 m) or greater.
- When placing a live air bag module on a bench or other surface, always make certain that trim cover faces up. This will reduce motion of module if accidentally deployed.
- After deployment, air bag surface may contain deposits of sodium hydroxide, which can irritate skin. Always wear safety glasses, rubber gloves and long-sleeved shirt during clean-up and wash hands using mild soap and water. Follow correct disposal procedures. See DISPOSAL PROCEDURESΒ .
- At no time should any electrical source be allowed near inflator on back of air bag module.
- Do not apply power to SIR system unless all components are connected or a diagnostic test requests it, as this will set a Diagnostic Trouble Code (DTC).
- When carrying a live air bag module, trim cover should be pointed away from body to minimize injury in case of accidental deployment.
- Do not attempt to service SIR components. If defective, these parts must be replaced.
- Do not probe a wire through insulator. Wire will be damaged and eventually fail due to corrosion.
- When performing electrical tests, prevent accidental shorting of terminals. Such mistakes can damage fuses or components and may cause a second fault code to set, making diagnosis of original problem more difficult.
- When using diagnostic tests to diagnose SIR system, under no circumstances should a volt/ohmmeter, test light or any type of electrical equipment not specified by manufacturer be used.
- If SIR system is not fully functional for any reason, vehicle should not be driven until system is repaired. Do not remove bulbs, modules, sensors or other components or in any way disable system from operating normally.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.