SOUNDGATE GMPD4 IPOD(R) INTERFACE (2004 - 2007 GM VEHICLES) GMPD4. IPOD(R) INTERFACE and AUXILIARY INPUT;FOR 2003 - 2008 GM CARS- ENCLAVE- STS- MALIBU- COBALT- HHR- ACADIA-G5- G6- SOLSTICE- AURA- ION- VUE and OUTLOOK