fuel gauge problems

[outlaw21]

just bought a 2005 tahoe and the fuel gauge be tripping when i put over $20 in gas. it reads fine as long as i don;t go over $20. if i do go over the gauge goes pass the full section sometimes it goes all the way down vertical. anybody know what could be the issue. the guage goes the the E once its off and back to the vertical way once its on. i have to disconnect the battery sometimes more than once just to reset it so i'll know how much gas i have

 

[Donut Slayer]

stepper motor is bad. 03-06 GM uses stepper motors for all the gauges. They are known to go bad. When 1 goes, usually the rest will go in a short time. My 04 had the volt gauge go, then the fuel gauge went, so I had mine rebuilt. These guys had a special I believe. http://fixmygauges.com/ I had a local guy come to my house and fix mine. Totally rebuilt my gauge cluster, all new stepper motors, bulbs and clean the cluster. Cost me $130. Well worth it. The new stepper's are a lot better than the OEM ones and dont go bad, from what I've heard.

 

[theBarzeen]

Stepper motor for sure....

my speedo went out like that.

GMgaugerepair up in Wisconsin did every gauge on my whole cluster for $110 including shipping. I sent them out on a Monday from around Chicago and they sent them back out the same day they arrived, back in my truck on Thursday.