1999 GMC Sonoma Gas Guage not correct

Avatar
PEPSIUSER
  • MEMBER
  • 1 POST
Electrical problem
1999 GMC Sonoma 6 cyl Two Wheel Drive Automatic

The issue is the gas gauge is not correct. When the float is all the way up, I show a little over a 1/4 of a tank of gas. So when I'm at a half tank, my fuel light lights up and the gauge is near empty.

So I thought it would be the fuel assembly. I replaced the fuel pump assembly twice. I checked the pump, 100 ohms when the float is up. 0 when down. Book says pump is good? Help, please. I guess, if I can't fix this, I don't have to worry about running out of gas.
Sep 5, 2010 at 5:11 AM
Avatar
HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
check your ground and see if you are gettinga blinking light to the sending unit. If you aren't then you either have a bad connection of the gauge may be bad.
Sep 15, 2010 at 11:18 AM
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.

Frequently Asked Problems for This Vehicle