1999 Saturn S-Series OE Wiring Harnesses & Stereo Adapters wwwd››Saturn›S-SeriesSaturn S-Series 1999, Aftermarket Radio Wiring Harness by Metra®, with OEM Plug. For aftermarket stereo. Metra preassembled wiring harnesses can make your car stereo installation seamless, or at least a lot simpler. 1999 Saturn S-Series Hitch Wiring | Harnesses, Adapters wwwd››Hitch Wiring›Saturn›S-SeriesSaturn S-Series 1999, Professional™ Inline to Trailer Wiring Harness Connector by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised.