Yes the other model versions will fit. For the rear bumper, you'll have to add some reinforcement across the middle where the step would be. Other members have done this upgrade as well, with I believe a couple pieces of scrap metal ti bridge the gap.

For the front, if you switch to the 06+ LT style bumper, there will leave a gap in the middle where the bumper dips down. So you'd need to upgrade your grille to either the 06+ LT one, or the SS grille to fill that in.

 

For the front, if you switch to the 06+ LT style bumper, there will leave a gap in the middle where the bumper dips down. So you'd need to upgrade your grille to either the 06+ LT one, or the SS grille to fill that in.

Some brackets will be needed also for the LT front bumper and you'll need LT headlights it you use the LT grille because it doesn't have the crossbar.

 

Thanks for the info

 

Rear bumper

Sorry, don't have an answer, but was wondering the same thing. I have an 06 EXT LS and wanted to know if an 02-05 LT rear bumper will fit. Hope we get an answer.