For those who have a 03 Tl-L with Onstar and Nav and want to keep the audio Nav and onstar audio, a good solution is to use a clarion SKR5. I connected the SKR5 to with an KVT910, Kenwood KAC-650D (5ch amp), and a KDS-P901 sound processor. I installed the SKR5 in the 1.5" Din slot on the new Metra kit. To place the SKR5 in the Metra kit I had to cut off 1/2 of the 1.5 din enclosure.

The audio for Nav and Onstar are on the same mono audio (wires A12&A14) at the HU connector. These 2wires are connected to the SKR5's supplied 50w amp. I split the SKR5 input to accept audio from the KDS-901 center channel output and the Onstar/Nav audio output. When the Navi or onstar is activated the KVT910 mutes the H/U audio including the center channel audio from the DVD, at this time the Navi or onstar audio is sent to the SKR5.

Its a good solution for retaining your Nav/Onstar audio and/or want a center channel for you DVD.

Clarion Center Channel Speaker

 

I know the 911 doesnt match, but I yanked it from my Sequoia. No sense in letting it go to waste. Would be nice if the Metra color matched as well

 

Metra cut

 

hey.. whats the part number for the new metra kit with the 1.5 din space.. i have been searching and i couldnt find it.. thanks