I have a 2005 silverado ext cab 4x4 (with only 17,000 miles) and the ABS is engaging at random. The ABS light is NOT on, nor has it ever come on. When I come to a slow stop the ABS kicks in, or when I make sharp, tight left turns it kicks in (even though i do not have my foot on the brake). It does not occur every time, it is random, so I am unsure of the cause...would appreciate any insights you may have...? Could this just been an ABS sensor, or some bigger problem?