Any Advance Auto Store will put a meter on it and tell you if it's the V Regulator, bad battery, etc.. If it's the gauge then all those things should check out fine and you can assume the gauge on the dash is wrong. Hey, it's a start and it's free
......... Tom
__________________
Cor·vette : [ kôr-vt ]n. 1. A fast, lightly armed warship, smaller than a destroyer, often armed for antisubmarine operations.