Direct Ignition System: Notes

2004 Oldsmobile Bravada RWDSECTION Notes
WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.

The electronic ignition system is of the Direct Ignition System (DIS) type and is controlled by the Powertrain Control Module (PCM). The electronic ignition system is composed of the following components:

  • PCM.
  • 4 ignition coil assemblies.
  • Crankshaft Position (CKP) sensor.
  • Camshaft Position (CMP) sensor.
  • Spark plugs.

The electronic ignition system provides the following benefits:

  • Improved ignition timing accuracy.
  • Reduced high-voltage losses.
  • Enhanced overall ignition system reliability.
The electronic ignition system components cannot be disassembled or repaired. A component that is correctly diagnosed as faulty must be replaced as a complete unit.

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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.