1998 GMC Suburban Owner's Manual - Page 160

Fuel Gage When the ignition is on, the fuel gage tells you about how much fuel you have left in your tank. It takes a little more or less fuel to fill up than the fuel gage indicated. For example, the gage may have indicated the tank was half f ~ ~ lbut it actually took a l, little more or less than half the tank's capacity to fill the tank. The gage moves a little when you turn a corner or speed up. The gage doesn't go back to EMPTY (E) when you turn off the ignition. None of these indicate a problem with the fuel gage. For information on how to fill your fuel tank, see "Fuel -- Filling Your Tank" in the Index. For your fuel tank capacity, see "Fuel -- Tank Capacity" in the Index. For the diesel engine fuel gage. see your Diesel Engine Supplement. The gage will first indicate EMPTY (E) before you are out of fuel, and you should get more fuel a s soon as possible. Listed are four situations you may experience with your fuel gage: At the gas station, the fuel pump shuts off before the b (rage reads FULL (F). 2-82