Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Is this a factory or aftermarket alarm system? First make sure the Battery terminals and cables are tight and free of corrosion
Disconnect both battery cables and rub the cable ends together for about 30 seconds to clear any possible logic jam issues in the computers on your van. Make sure they are clean and tight when re-assembling. I assume you already tried cycling the key in the ignition and/or door lock cylinder to try to turn it off?
How do you cycle the key or how do you remove the battery cable ends?
Simply put the key in the ignition and turn it from off to the on position 5 or six times without starting it.
Did this help at all with the never ending horn situation?