The bulb in the DRL is a 4157. I am not sure that they make a PIAA that will work in there yet... I think that they are in the process of doing that.. That is what the guy at PIAA told me when I talked to him..
BADRAP
03 H2, Lux, Pewter, more upgrades soon..
Houston Texas H2 Hummer Chapter..
badrap@sbcglobal.net