So I have a '05 Vette and just a few weeks ago i noticed my cruise control doesnt work anymore until i hit around 90mph. Once i hit 90mph and set the CC it will say CC set to 25mph??? wtf? so i do a scan and check for codes and got nothing. Drove around while scanning and saw the vcm scanner speedo barely getting 3-4mph while i hit 40-50mph. keep in mind my dash speedo works perfectly. anyone ever encounter this kind of thing before? could it be a wheel speed sensor or something?