rusty frame 2002 Silverado

[TomL]

Does anyone know if an assembly manual is available for my 2002 3500 Silverado Chassis Cab 4WD? This past fall I noticed the left front suspension and part of the frame as well as other locations like cab mounts are now rusted beyond being safe to drive. The rust has been there for years but seems to have avalanched in the last year. I have checked with several people who do garage repairs or restoration work and they all say the frame needs to be replaced. This truck has the Duramax with Allison trans with only 60,000 miles and no other problems but rust so it still has a lot of value to me. I'm willing to do a frame off and paint each piece in the process but without an assembly guide it is a little intimidating. Any resources out there?