98 Chevy Alarm system problem

The battery on my 98 chevy 1500 went dead after leaving the dome light on. When I try to jump start it the alarm system goes off and I don't have the remote. I then decided to take the battery out and have it charged at a local shop. When I put it back in and tried to start it the alarm went off again and won't let the truck start. How can I get my truck started again? Can I unhook the alarm? If so how?

Does your truck have an aftermarket alarm? I do remote starters for a living and I've never heard of that problem. Depending on how the unit was wired in, you usually can find it up under the kick panel. Then just unplug it.

I think it is the stock alarm, I bought the truck used about a year ago. I thought taking the batery out and charging it would stop the alarm from going off, but I was wrong. I'm gonna try to unplug it, but I don't really know what I'm unplugging.