2001 yukon xl rear speakers don't work

[KB01YUKON]

hello , new to this forum so far have found lots of help and some pretty sweet rides. i need help i have a 2001 yukon xl installed a pioneer DEH-P4000UB and a casette delete pocket. but every since i have had it the rear passenger speaker and both of the rear pillar speakers dont work. I have taken out the pillar speakers and swap them with my dads suburban and mine work in his but have not swap door speakers to see if they are working correctly . i have been all over this forum and havnt really found what im looking for . anyone ran into this?

 

[ScottyBoy]

I know for some reason the rear pillar speakers in my 01 Burban stopped working when I removed my factory stereo and installed an Alpine a few years ago. To be honest, I just never worried about it because the 4 door speakers are more than enough for my ears.

 

[KB01YUKON]

figured it out on my pioneer had to turn it off then go into sub settings and turn it to full not sub w that turns the rear speakers on. rear pillars work again but doors are blown sooo.... new speaker time