change fuel filter light won't reset, whats wrong & is this a common problem?

Try resestting it yourself before thinking the worse. Maybe they werent doing it right. It may have been their scanner that didnt comunicate with your truck rather then the other way around. To reset your fuel filter life with the key in run position (engine not running) hold your gas and brake for 10 seconds or until the message comes up saying fuel filter life reset.

FUEL FILTER LIFE RESET This message will appear when a reset is performed either by using the steering wheel controls or following manual procedure. Reset the fuel filter monitor. For vehicles with steering wheel controls, press and hold the select button for 5 seconds while the "FUEL FILTER LIFE" message is displayed. This message will appear on the driver information center (DIC) for ten seconds. For vehicles without steering wheel controls, do the following: Without pressing the pedals, turn the ignition key to the "ON" position without starting the engine. Wait 5 seconds. Completely press the brake and the accelerator pedals simultaneously and hold for 10 seconds. The system is now reset. Turn the ignition key "OFF". The next time the engine is started, the message will no longer be displayed. ALWAYS reset the FUEL FILTER LIFE system after a fuel filter change. Roy