| the 04 ur talking about is an lly? lb7?... more then likely an lly cause you said there was head gasket issues
but i believe that they are all same frames
but it would be way more work to get the lmm and put it in then fixing the 04 engine
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2003 Silverado 2500HD 4x4,Ext, LB7, Silver
6inch Black Single,
18inch Rockstars with 285 Nitto Terra Grapplers
Ported MouthPiece,PPE Lift Pump
Autometer Cobalts, K&N Intake, Cognito HD Tie-Rods
EFI Live with DSP 2 Switch Tuned by MMLMM
SunCoast Stage III
- Jake | 
Jr 18-9 pro comp rims sitting on 325/60 r 18's Toyo A/t's,Westin Chrome nerf bars and Plasma Glow low beams and all emblems are gone except for the Z71 and Duramax on the hood,molding gone too.
Linear Mode
