why is my voltmeter reading over the end of gauge

2003 GMC SIERRA
122,000 MILES
Avatar
MILNE
  • MEMBER
  • 5 POSTS
The battery reads normal at 14.7 volts. can i just change the gauge? new alternator and battery. Any ideas. i appreciate your help.
Jan 7, 2012 at 4:33 PM
Advertisement
Avatar
RASMATAZ
  • ✓Experienced Mechanic
  • 75,992 POSTS
The voltage regulator has gone bad inside the alternator.
Jan 7, 2012 at 4:51 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
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.