HEY GUYS IM NEW AND MY NAME IS JESSIE,WELL ANYWAYS I HAVE A 2003 TAHOE LT, AND ITS BEEN ACTING UP LATELY MY ENGINE LIGHTS ON AND WHEN I HAVE IT ONE THE RPM STARTS TO IDLE AS IF IT WANTED TO TURN OFF, IT HAS A COUPLE PF TIMES AT THE LIGHT.DO YOU HAVE ANY IDEA WHAT IT COULD BE??PLEASE HEELLLPPPPP!