Pulled the 5.3 (28K miles) out of my truck last fall and replaced it with a LS1. Absolutly nothing wrong with the 5.3 just wanted something bigger.
This is just the block, heads, valve covers and a junk oil pan for shipping purposes. I kept everything else for the LS1.
This is the only picture I have right now but can get more if needed.
http://img.photobucket.com/albums/v359/Zick/LS1018.jpg
I'll even throw in a intake manfold for it and some 03' injectors too.
EDIT: Price drop
$800 plus shipping
Located in WI
New Truck on it's way: '07 Classic GMC 2500HD DuraMax LBZ
03' Silverado ECSB 4x4 Z71 LQ9, TR230, Patriot LS6, 31lbs, Trailblazer stall, Corvette servo, Corsa Touring,
HP Tuners
SOLD - 99' Silverado ECSB 4x4 5.3, Edelbrock RPM, Nitto Terra Grapplers, Texas-Speed Tuned 02' PCM, LT1 fans