Car Alarms: Alarm chevy van g-20 van

Question
I have a 1995 G-20 Van chevrolet and the Alarm will not let me start the van. I do not know what happened but I went out and tried to start the van and the alarm started going off.my alarm keypad doesnt work anymore(changes the battery)tried to disconnect the battery but nothing happened. How can I get the Alarm reset . It's a factory alarm ..i cant find the valet switch ..thanks!!

Answer
There is no OEM/Factory alarmn that would keep
you from starting the engine. It's after market and would
need to be located and extracted.

If this interests you, those notes are
available at www.wiringdata.com for 4.99 to
safely locate, remove and repair this
vehicle to pre install conditions.

ALARMTEK