[vtmecheng]

Random Cylinder Misfire means one of the sensors, like crank or knock sensor, detected a hickup. This hickup can be caused by a lot of different things. Change your fuel filter first, always a good thing to do on a high milage vehicle. Take some fuel injector cleaner, Techron stuff (guys on Tahoe section have this problem all the time and say Techron is only way to clear it up), put it in the tank and fill with only 12 gal of gas. Let us know how this works and we can go from there. Good luck.