The AOEM-GM21 Premium Sound System Interface is a 'specific application' adaptation of the PAC OEM-1 interface. This adapter will allow you to add an additional after-market amplifier in many GM vehicles with a factory Bose amplified sound system. You will be able to keep the factory amp and sound system unchanged (see Specific Vehicle Application List below). The interface is transformer isolated, maintains phase and is linear from 20 to 20,000 Hz. This 4-channel interface will allow the output to be adjusted to the input requirements of the new amplifier, providing 2:1 gain and infinite attenuation. The input connectors plug into the factory stereo and vehicle harness. The 4 female RCA output jacks plug into the new amplifier. Comes complete with amplifier trigger wire. Just like the factory stereo system, the warning chimes will play through the front left RCA output of the interface. Also, turning on the rear entertainment controls, if so equipped, will make the rear outputs of the interface play a second audio source.
Applications:
1992-1998 Bonneville
1990-1997 Camaro
1991-1996 Caprise
1990-1996 Corvette
1988-1994 Coupe DeVille
1988-1991 El Dorado
1990-1997 Firebird
1988-1993 Fleetwood
1988-1994 Le Sabre
1990-1996 Lumina
1988-1991 Park Avenue
1990-1995 Riviera
1991-1996 Roadmaster
1988-1991 Seville
1988-1993 Toronado
Part#: AOEMGM21 PAC AOEM-GM21 1988-1997 GM Premium Sound System Add-an-Amp Line Output Converter