A 2003 would not have a SJB but instead uses a GEM ( Generic Electronic Module ). DRL is not a programmable parameter for that model year. It looks like all you should need would be a DRL module and relay along with a couple of fuses. The only problem I am seeing is that I looked iin the area where these two components should be located on a 2002 Trib and do not even see any unused connectors that would plug into the module and relay. Would have to say that it either has DRL or it does not period. Think you may have less headache involved by just going with an aftermarket system.