I hope this is just a quark of GM engineering.
I notice that my fuel gauge will move around a lot especially when lower that a half tank.
For example the tank is at !/4 full I go around a nice sloping corner to the right I now have 1/2 tank and if to the left DING DING DING check gauges comes on. The movement is less dramatic like I said when there'* 1/2 tank or more.

Now all other cars I've had the fuel gauge movers ever so slightly in the same situations. At this point I've just gotten used to it moving but if it'* broke than I'll add it to my list.

Thanks

there is a bulletin in alldata on this you have to install a anit slosh module and it will go away.

I have a wonky fuel gage as well, nothings wrong with yours, but Jr is right, its a GM quirk :?

gm shoudl have replaced the sensor on that...

Anyone got a part number for this "anti-slosh module"?
I'm curious on the cost.

I had same problem with a Ford Lightning I use to own, replaced the slosh module and it fixed it.

Welcome to GM"* great idea! You see the float in the tank is set in a certain position. So when you either climb or go down a steep graded hill, your fuel level moves drastically. GM did this to prevent it from staving the engine on tight, high speeds turns instead.

Sometimes thats another reason thats why i like to occaisonally like to drive my moms mustang..that gas meter doesn't budge...led for or not. It'* kind of a good feeling...but on the other hand..it'* still a mustang ..peww.

Well it'* always nice to see the gauge where you assume it should be for the milage, and then it surges up and stays up. Always reassuring. Mine takes about 15 gallons when it hits the yellow line before E on average.

The 998th recorded bonneville crazyness is now over, please return to your regularly scheduled post whorage, Jim, Don, Will be my guest..