2010 Cadillac CTS Owner's Manual - Page 128

4-18 Instruments and Controls . The Fuel Level Low message appears in the Driver Information Center (DIC) and a single chime sounds. See Fuel System Messages on page 4‑42 for more information. Here are four things that some owners ask about. None of these show a problem with your fuel gage: . The gage moves a little while turning a corner or speeding up. The gage takes a few seconds to stabilize after the ignition is turned on, and will go back to empty when the ignition is turned off. . Boost Gage At the service station, the fuel pump shuts off before the gage reads full. It takes a little more or less fuel to fill up than the gage indicated. For example, the gage may have indicated the tank was half full, but it actually took a little more or less than half the tank's capacity to fill the tank. United States Canada For the CTS-V, this gage is located in the instrument panel cluster. This gage indicates positive manifold pressure which is the induction air pressure level in the intake manifold before it enters the combustion chamber. This gage reads zero under light throttle before boost is generated. This gage automatically resets to zero every time the engine is started. .