Auxiliar input on stock radio.

[Juanmiguel]

On the GTP I have a stock delco with CD head unit. For which I added a cassette player unit in the glove box so I could tap in the audio line as an aux input.

I just did something similar to the monzoon head unit on the Trans am:

How you can add an aux input/mp3 player without an adapter - LS1TECH

The difference is that you don't need an external cassette player and you just tap in the CD line within the head unit. I never took appart the GTP unit and I was wondering if it could also be done on the Delco GTP stereo. Has anyone tried doing it like that?

 

[TLSheff]

LT1/TA did it, page 10, post # 187 & 192

It had the ribbon cable, so it was much more difficult, I plan to try this on my 99 and see how it would go. Hopefully it won't be that bad and I won't short anything out. My CD play skip thing stopped working so the slightest bump and the song skips, so sitting its perfect but driving at all is out of the question, and the radio is getting old. I just can't break myself to spend the money on a HuMount and a new aftermarket CD player. This would be a nice cheap alternative.

^ His final product. Looks clean and this would be the way I would do it.

His how to pics are

Yes,I cut the ribbon cable it is also circuits 1&3(1-left channel and 3-right channel),then I soldered the four wires to the ribbon,but the right channel out to circuit board wire broke loose so I soldered it straight to the circuit board.The face plate took a little time,but it was well worth it to me and the clearance on the jack to the trim bezel is very close,but it plugs in just right. Here the right channel out from the jack to the circuit board connection,the left channel out from the jack is still soldered to the ribbon.

Just another cool thing about the faceplate install it that the jack port lights up with the radio lights.The picture does not show to well,but it is very visible in person just under the hour and minute illumination.

I put some pics up showing how the case was modified and the black silicone looks terrible covering the solder joints,I wish I had used a hot glue gun.

 

[Juanmiguel]

Yeah looks the same on an AC delco radio. Although as you said, the ribon cable looks more difficult to tap in. I also didn't use a Jack, I just took a cable out the back of the unit and interrupted the signal completelly. I haven't bought a music CD in years so I won't miss that function.

I have an amp, 10" subs and speakers in my basement, just too lazy to install everything. I also don't want to add more weight to it. I also installed a couple of 6.5" subs on the sail panels yesterday.

Maybe if I get tired of everything I want to install a 2 din unit with the steering wheel controls and stuff, but the price on that plus the 2 din frame is high, so I'm sticking with this for now.