Thanks, and no the ABS light isnt on, i have 4wheel ABS, but it just doesnt do anything in the snow.. Gravel it is pretty much impossible to get it skid lol. The pedal pumps a tiny tiny bit, and the tires just slide with out any real affect. But im just wondering and didnt know how sensative and or powerful they really are.Did you try this on dry pavement or on gravel? I am a brake and suspesion tech and I try and do my initail test at around that speed in a straight line in a designated gravel lot. If you get the pedal to drop and hear the pump running than it is working, I have noticed that the trucks with 20's dont lock up as easily as the ones with let say the 17 inch package. They have the same brakes but the bigger Wheel/tire has more leverage, plus if you are comparing it to the chevy,it wont feel like it is as sensitive. This is assuming you dont have an ABS lite on because if thats the case the system has shut it self off and you dont have any ABS. Good Luck.