The HUD was available on the GT & GTP in 04 & 05, but for 06 it's only on the GXP. I read somewhere a while back that Bob Lutz (Pontiac's head cheese, who took over in 2002 or so) thinks of the HUD as a gimmick only. The 06 availability seems to confirm that. I think he's making a serious mistake.
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2005 bleen Comp G!
Just checkin' in periodically :-D