Get some engine degreaser and go to the local self-carwash and clean the crap out of the undercarriage. If you are going to be spraying from the topside of the engine compartment, be careful where you spray. If you accidently spray ignition parts you may not be able to restart the truck for a bit to a day or so depending on how wet you soaked stuff.
Once it's clean, wait a few days then look for fresh leaks.