2008 Gmc Sierra Voltmeter On Dash Reads Low Voltage Less Than 14v Voltage

2008 GMC SIERRA
37,000 MILES
Avatar
ANONYMOUS
  • MEMBER
  • 1 POST
Voltmeter on dash reads low voltage, less than 14V but voltage output at battery with hand held voltmeter says 15V rising to 17V+ while running. Does the alternator need to be replaced? Load test on battery shows OK but battery dies after more than 2 days of not running engine.
Mar 21, 2013 at 6:39 AM
Advertisement
Avatar
HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
recheck battery first take inital load off of battery by turning headlights on for 20 seconds wait a minute then recheck battery. sounds like the battery is sulfated. do a true load test on battery not just putting voltmeter on it most auto parts stores can do it for free. if still doesit go to site and look uner how to repair -battery item 9 parasitic draw tells how to check that
Mar 21, 2013 at 7:01 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
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 new question

Frequently Asked Problems for This Vehicle