Popping/Crackling Noise or Distorted Sound from Speakers at Low Volume When a Compact Disc (CD) is Played (Replace RPO U1C CD Player/Radio with New Design CD Player/Radio)

Some customers may comment on a popping or crackling noise or distorted sound coming from the speakers at low volume, which only occurs when a CD is being played. The noise is most noticeable when bass is predominant in the music being played. This condition only affects vehicles with the single-disc CD/radio unit (RPO U1C) illustrated below.

The low audio frequency (below 20 Hz) may be over-amplified, which may cause the speaker to sound distorted (overdriven).

The circuitry from the CD player to the internal radio amplifier has been modified to eliminate the popping/crackling noise and distorted sound condition. If vehicle is affected by this condition, install new single-disc CD/radio unit, P/N 21997420.

Important: If a popping noise is also present when only listening to FM or AM radio, then further diagnosis will be needed. Refer to diagnostic procedures in the appropriate Saturn Service Manual or SI. This bulletin only covers the issue of noise and sound distortion when a CD is being played.

1. Remove single-disc CD/radio unit using removal procedures in the appropriate Saturn Service Manual or SI.
2. If installing a single-disc CD/radio unit in a 2000-2003 model year vehicle, then proceed to Step 3. If not, then proceed to Step 6.



3. Remove jumper harness from the back of the old single-disc CD/radio unit and retain harness for use with the new service single-disc CD/radio unit.
4. Remove and discard the jumper harness from the new service part.



5. Install jumper harness that was removed from old single-disc CD/radio unit onto new service single-disc CD/radio unit as shown in illustration.
6. Install new single-disc CD/radio unit, P/N 21997420, using installation procedures in the appropriate Saturn Service Manual or SI.

* Canadian Retailers should obtain parts from an ACDelco Radio Centre.

To receive credit for this repair during the warranty coverage period, submit a claim through the Saturn Dealer System for R0760 (Radio Receiver - R & R or Replace).