Originally Posted by partsguy84823
The easiest way to tell would be to look at the front spindle and see if there is an electrical wire going to the spindle. The 4wheel ABS trucks will have a wire that goes to a sensor which reads pulses from a toner ring on the hub assembly.
The 2wheel ABS trucks don't have that sensor or the toner ring on the hub.
PS if the truck is 2wheel ABS, its ABS on the rear only... just FYI.
Not true... My truck doesn't have 4 wheel ABS, yet it has the ABS sensor in the front hubs, complete with wiring. I know the truck doesn't have ABS because my insurance went up due to it (ABS is a discount), and, well, if you lay on the brakes, the tires lock up.