1969 - 1970 Corvette: Chevrolet Engineering Service Letter: Radio Service Update
Subject: 1969 and Future Corvette Suppression Material - U69
Model and Year: 1969 - 1970 Corvette
Source: Chevrolet Engineering Service Letter - 70-1-23
It is possible in weak signal areas that noise in the radio will be apparent enough to cause owner complaints. This condition should not be prevalent in a strong signal area except to a most critical listener. Should these complaints occur, the following is recommended:
- Remove and discard ammeter capacitor #3934217. The capacitor actually adds alternator noise into the radio.
- Re-route the ammeter lead wires into an existing harness retaining clip in such a manner that these ammeter wires DO NOT drape down on top of the radio case. The proximity of the ammeter leads induces the same noise electrically into the radio case.