Can someone tell me where to locate the mega fuse on a 2003 hummer h2?

 

No such thing exists. What are you chasing?

Unless you are talking about the 60A fusible link that runs some accessories? Closest side to the front of the vehicle, on the outside edge, side of fusebox.

Otherwise you better explain better.

 

MOVED for you to the H2 section where all H2 tech questions belong.