Generator Whine Concerns

2006 Pontiac G6 GTP, 2D Coupe, StandardSECTION Generator Whine Concerns
WARNING: This page is about a different car, the 2007 Saturn Sky. However, it is still accessible from the selected car via links, so may be relevant.
  1. Inspect the ground terminal and cable for high resistance.
  2. Inspect the generator and brackets for loose or coated mounting bolts.
  3. Inspect that the ground straps between the engine and the frame are clean and tight.
  4. If the noise is still present, inspect the charging system for proper operation. Refer to Symptoms - Engine Electrical .
  5. Install filter GM P/N 1224205 in the battery voltage feed circuit to the radio.
  6. If the noise is still present, install the filter in each of the following variations:
    • Install the filter with the single wire side toward the radio and the ground wire attached to chassis ground.
    • Remove the ground to the filter.
    • Reverse the filter so the two wire side is toward the radio with the ground wire attached to chassis ground.
    • Remove the ground from the filter.
  7. If the installation of this filter causes a delay when turning the radio ON or OFF, or other noticeable performance problems, remove the filter and install a 0.47 micro farad capacitor (P/N 1227894) to chassis ground.
  8. Before reassembling the vehicle, remove any unneeded filters.
  9. Test the functionality of all the vehicle systems, including those not related to the audio system, for proper operation and function.
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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.