Originally Posted by Qsilver7

BTW...I think a question like this should have been asked in it's own thread...1st because it's not "dumb"...and others may need to know or learn of this info. As of now...it's buried in a thread like this where anyone seeking the same information would have no clue that a question like this has been asked & answered. Just something to think about in the future.

There's some type of change that took place sometime around the face lift. Go back to the part database and do a part nbr search for each part nbr...take note that one nbr is for the 3.0/4.4/4.6is with the M54/M62 engines...and the other nbr is for the 3.0/4.4/4.8is with the M54 & N62 engines...plus a date of 10/2003 in the FROM column.

In the back of my brain...there's a foggy memory about a change in the liftgate.

EDIT: found it...the SCA (soft close actuator) changed at the 10/2003 mfg date: