What size is the large caliper bolt on a 2003 dodge ram 1500. One came out while i was driving and i need to replace it. Any help is appreciated

 

YOu might want to double check all your other caliper bolts to make sure they are TIGHT.

If you are talking about the bigger sized bolt that bolts the caliper braket to the hub/spindle i think this is the size:
M14X2.00X51.00

but im not positive

 

Uh....yeah.

I would be checking everything under my truck if one of those came loose and fell out.....LOL

P/N though is 06506599AA. IDK the price but your dealer should.