can i up grade my 00 sle to the 06 dts front brakes

Never heard of that being done here. If it bolts up , why not? Do you have a set just hanging around?

worked on some at work and notice they are bigger and have dual pistons, are they the same as the gxp brakes.

No, The GXP has very large brakes that just fit in it'* 18 inch wheels and specially designed 17 inch spare, but they are not dual piston. The GXP has its own suspension, designated FE5. I dont believe it shares those parts with any other make or model.

are the gxp brakes larger than the dts and will they fit on my sle

brake warehouse.com shows the brakes on the gxp as having dual piston calipers and 12.72'' rotors and i do believe thats the same as the caddy, i just want to know if i can make these brakes work on my car. oh , the caddy had 17'' wheels also

Found this, Cardone Unloaded Brake Caliper: Part Number: 184718 This product fits the following vehicles - click on a vehicle to see detailed engine information. BUICK 2000 - 2005 LESABRE 2000 - 2005 PARK AVENUE CADILLAC 2000 - 2005 DEVILLE 2000 - 2004 SEVILLE OLDSMOBILE 2001 - 2003 AURORA PONTIAC 2000 - 2005 BONNEVILLE SLE

you can. but the real question is WHY?

well bigger is better and i really want the dual pistons.