inputs.text: jvc kwr500nice unit - installed unit one day ago axxess gmos01 02 gmk422 kit metra 40gm10 antenna adapter 2004 gmc envoy purchased jvc kwr500 kit sonicelectronic 10900 gmos came needed wires not need additional harness install faster gmos not come instructions little trouble though finishing really easy cut back piece factory radio attached jvc would fit also cut tabs gmk422 get fit not flat head screws attach snug enough not attach sides jvc nice unit plenty features great sound need update speakers certain level become little distorted not found fadebalance yet pleased