upgrading stock stereo in gmc

[EZmoney]

i have a 2011 gmc has anyone added a amp and subs to their stock stereo. i dont want to change the deck and alter the dash so looking for some advise on how to upgrade and whats good to use. thanks

 

[AndrettiDog]

i have a 2011 gmc has anyone added a amp and subs to their stock stereo. i dont want to change the deck and alter the dash so looking for some advise on how to upgrade and whats good to use. thanks

I have a 2011 GMC Denali and really like the stereo. But then again i have outgrown the ear thrashing sounds I once liked. There are additional pre-amp outs on that stereo. Talk to the guys at Crutchfield. They don't always have the best deals but they have great knowledge. I hate going some place like local audio places because it seems like 18 year old guys run the place.

Here is one product that caught my eye. I like the software interface.

Helix P-DSP