Using a heat gun to soften the dicor lap sealant and remove it should take approximately 30 to 45 minutes being careful with a plastic putty knife. Cleaning the surface 15 minutes. Applying the dicor self leveling sealant about 15 minutes.
Dont accept a price any more than 2 hrs labor plus 1 tube of dicor on your front cap if you plan to hire it done, but the problem is the wait time for a dealer to get to it. It may be worthwhile to get a mobile tech to come to you.
If you are able, it's really not that difficult and you may find that it just needs a touch up. Also, look at the caulking on your running lights if you have any on your front cap. Do not use regular house window caulk on your roof cap, only Dicor self leveling.