1995 Chevy Suburban Dropping Voltage at Guage

1995 CHEVROLET SUBURBAN
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SURBURBAN OWNER
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Electrical problem
1995 Chevy Suburban V8 Four Wheel Drive Automatic 149K miles

As head lights, AC (front and back), interior lights are turned on. Voltmeter guage begins to drop. Once below 10 volts on guage engine stalls, but will crank back up.
Battery and Alternator have been checked. 90 amps output under load.
Turning signal causes volt needle to drop a volt and only the inside head lights work on hi-beam. Is this normal?
Aug 20, 2009 at 3:17 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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