Noise Diagnosis - Corrective Action

^ Use the proper tools for diagnostics and repairs.
^ Follow ESD guidelines.
^ Use the following available noise suppression devices:
- 220 mF (50 V) capacitor GM P/N 1227895
- 0.47 mF capacitor GM P/N 1227894
- Fuse block capacitor GM P/N 469328
- Feed through capacitor GM P/N 477371
- Filter package GM P/N 1224205
- Turn signal suppression GM P/N 3861565
- Fuel pump suppressor GM P/N 25027405
- 21 in braided ground strap GM P/N 8910791
- 19 in braided ground strap GM P/N 6286800
- 10.5 in braided ground strap GM P/N 6287160
- 8.5 in braided ground strap P/N 12091511
^ Utilize the test tape/CD diagnostic kit GM P/N J 39916-A in order to optimize proper audio diagnostics.
^ If the condition requires service of the radio at a service center, describe the symptoms on the warranty form accurately. Along with the warranty form, send a copy of the service writer check list with the unit.
^ Do not leave a CD or a tape in the car. Extreme heat may cause permanent damage.
^ Cassette tapes may be damaged if not stored in the case. The vibration in the vehicle may cause the tape to unwind inside the cartridge.
^ Inspect all of the connectors and the wiring to the speakers before you remove the speakers.Examine the connectors for bent or loose pins.