Re: tahoe Q6 06 fuel gage
The diagram below shows a typical fuel sender. These are not especially accurate since fuel tanks are rarely uniformly shaped. The float arm can be bent and on some the float itself can be moved up and down the arm to affect the resistance element in that sends the varying voltage to the gauge. But here's the rub. You can't adjust for both empty and full accuracy. The idea is to adjust for EMPTY as you want to know when the tank is empty. You know when it's full because you filled it. Once you run a few tanks of fuel you will know roughly how much fuel you have at the 1/4, 1/2 and 3/4 readings. Look at a fuel tank as a cone shaped paper cup. If the level of fuel in that cup is half way been the bottom and top fo the cup the sender says you have 1/2 tank. You really have roughly 1/3 tank because there is more fuel in the larger upper half of the tank than the smaller bottom half. So the trick here is to remove the sender, measure the depth of the tank in the area of the sender. Then holding the sender perfectly upright with the float arm hanging down, measure from the sender mounting flange to the center of the float. Adjust the arm (bend it) or adjust the float so it is about 1/2 - 1 less than the tank depth. Reinstall the sender and when the gauge shows empty there should be about 1-inch of fuel left in the tank. The full reading will be whatever the gauge says.
