How can I repair or bypass the Security alarm? I would prefer to find problem. on 1999 Chevrolet Silverado 1500

Everytime or 90% of time I unlock driver side door with key the factory alarm (horn) goes off. It will not go off if unlock the passenger door.

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1 answer
It may be a bad door lock actuator in the door. There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online