So, heres the thing, Every 2 days my truck turn on with ABS and brake light on, I check the res. for fluid, empty. look under truck no puddles no drips no nothing, It's been going on for 2 weeks now, I drove my truck 2 days ago and parked it filled it with fluid and let it sit to see if i could find the leak, started it this afternoon, bone dry no leaks anywhere...and ideas??

 

could be going into the vacuum brake chamber.

 

X2 moe's reply

 

Let the truck run idle for a while and find out if it is loosing fluid when the engine is running or when the vehicle is moving and braking and such. That'll tell you if it is the booster chamber (I hope...) or a brake line. Personally, I have a hunch that one of the lines is leaking under the high pressure of braking but not under the low pressure of siting in the driveway.

And welcome to DF!