Adding Aftermarket Sub/Amp

Prosnowsk8er · February 28, 2014

Finally got around to installing my sub and amp, truck has the Bose but it needed some more thump.

JL 500/1 amp and a 12" Alpine SWR-t12 under the back seat. These thin alpines are awesome!

cmpcpro · February 28, 2014

Nice! I have been wanting to do this but am afraid of warranty issues should anything go out. I have been seeing others have their Mylink systems go out and know GM would blame anything like this on it.. Did you have to cut any wires? Or splice anything? Can you show pics? Thanks!

LTZ2014 · February 28, 2014

Nice! I have been wanting to do this but am afraid of warranty issues should anything go out. I have been seeing others have their Mylink systems go out and know GM would blame anything like this on it.. Did you have to cut any wires? Or splice anything? Can you show pics? Thanks!

This will not hurt your mylink at all. You only have to t-tap into a pair of speaker wires to a line output converter. Two 10s under my back seat.

GMC-AT · February 28, 2014

To the poster... Do you have a crew cab or double cab? Can you post some pictures

cmpcpro · February 28, 2014

This will not hurt your mylink at all. You only have to t-tap into a pair of speaker wires to a line output converter. Two 10s under my back seat.

That looks great! I am not worried about it hurting my Mylink, I was saying I have seen others having their Mylink go out, and I would just be worried if the amp, or Mylink or part of the system were to go out that GM would try to blame it on tapping into the system. Did you have to run the amp kit all the way to the battery? Where did you run all the wires? How did you get through the firewall? Thanks!

Prosnowsk8er · February 28, 2014

To the poster... Do you have a crew cab or double cab? Can you post some pictures

Crew cab, I will try and get some pictures this weekend. I only taped off the one rear speaker and My amp allows line level input so no need for a line out convertor.

I ran my power wire down the right side, if you pop the kick up under the dash there is a grommet there where the wiring goes through there that is by far your best bet for power.

I did find something funny tho.... I opened the back door sill and found a rusty bolt floating around, the picture to is to big to upload right now so I will try that again

After when I'm not on my ipad.

fondupot · February 28, 2014

Nice. I been thinking of doing this, but in my double cab, space is limited. and I dont want to lose all my under seat storage.

DCazares · February 28, 2014

Did you add this to the 6 speaker Bose or 7 speaker with subwoofer?

Prosnowsk8er · March 2, 2014

Did you add this to the 6 speaker Bose or 7 speaker with subwoofer?

I don't think there is a 6 speaker only is there? I have the 7 I guess with the bucket seats and sub

Can't seem to get my pics to resize

gmc_downstream · March 9, 2014

ho are y'all running the amps? Anyone running wire to the radio or tapping it all into existing speakers?

jdthomas24 · March 10, 2014

Power from battery terminal. Ground to back seat bolts. Remote from Bose amp on back wall.

Several ways to feed the rcas. One you can use the output for the Bose sub on a powered RCA converter. You can also use a direct off the rear speaker wires. One thing is that most are mono amps for the subs. The Bose noise cancelation can affect the sound if you try and use both rear speaker wires for RCA taps. It reverses the phases on one speaker and causing the amp to be out of phase and kills the sound output. Use just one side and double tap into for rcas. This will repair that issue. Or you can always unhook the nisei cancel speakers. I wouldn't do that though.

navinke · March 10, 2014

Can someone measure the height under their rear seat on the 4 door/double 2014?

MotoMedic · March 10, 2014

You might check behind the rear seat and see if the non-Bose also uses a separate amp? (it might since these newer trucks don't have traditional head units).

If not, and it were me, I'd just tap the right rear speaker's wiring behind the B-pillar.

Edited March 11, 2014 by MotoMedic

bigbee · March 10, 2014

For non-Bose, you can tap the rear speaker wires in the B Pillar before they go thru the harness to the rear doors. They are twisted pairs.

Left Rear Speaker (+) green // (-) green/black

Right Rear Speaker (+) white // (-) blue/black

Vince Stormes · March 10, 2014

I just bought my '14 Silverado LTZ Z71 4X4 Saturday. I have the BOSE system, but the window sticker does not say if I have the factory sub or not. How can I tell?