my speakers only work some of the time and now just the highs to front door. i thought it was my fac head unit i am on number 4. i replaced now with after market unit and still only front highs work. could some one please help me figure out my problem. with the fac head unit some speakers would work and next time the ones that would work stopped and the ones that did not work, worked.

Maybe you have a broken wire, or bad ground somewhere..

i would guess you probably have a factory amp and thats bad. most people just bypass them because of there poor audio quality.

quick google search says it should be in the center console

i do not have center console. i have a 40-20-40 front seats thanks any way i will look around

You have the non-bose stereo correct?

correct no bose

Ok, I'll do some digging for you. See what I can find.

I have a 2004 non-Bose myself.

http://chevytruckworld.tenmagazines.....asp?id=194331
seems like some have the amp in the radio, some in the pass side dash. when you replaced the radio how many speaker wires where there? if you have separates, the radio would have 2 for each channel and the amp separates the freq'* and has separate outputs for the different speakers. if you dont have an amp all those wires would have to come from the HU

According the info I got from a Full Size GM truck forum I'm on, the 6.5" speakers are bad. Apparently it'* very common for the OE speakers to rot out. This causes them to short on themselves thus causing the "intermittent" issue.