So, over the past week or two I've noticed the ABS and Pbrake light come on in the dash while I get over a certain speed, 55 or sometimes 35. But more recently has it been coming on while I'm hauling stuff around my property or moving the truck from the barn to garage to do work on it. I did the whole slam on my brakes while driving to see if any of my wheels locked up to see if ABS is out. It isn't. I have noticed my brakes are a lot more squeaky than what they normally are. I have had no problems with my brakes ever since I noticed the lights coming on.
Has anyone else experienced this and know what may or may not be wrong?

 

Look under the dash at the parking brake assembly it has a switch on it it may be bad but I think it has something to do with the sensor on your rear Differential that needs cleaning up or replaced if I remember it is the speed sensor and ABS sensor both

Have you pulled the rear diff cover and drained it and cleaned it up if not that may do the trick.

 

Okay thank you!
I'm guessing the speed and ABS sensor are one or are they separate?

 

The ABS/speed sensor on the rear diff is going out. Located on top of the diff passenger side. Simple fix.

 

would that make the Pbrake light come on though? ABS I can see, but not Pbrake..it actuates off the pedal.

 

Pop the parking break a few times and see what happens the switch just may be stuck

Cant hurt to try the switch is easy to see if I remember

 

Definitely the ABS sensor, going to replace it tomorrow when I make a trip over to the local parts shop.
I'll also have to take a look at the P break tomorrow too, forgot to do that today, got caught up replacing the blown infinity speakers and enjoying the results.