The chassis portion, manual should be the same as a 3500 series Savana ( sp ?) passenger van .
Were you searching for 1998 Chevy 3500 Cut away chassis manual ?
EDIT : Found the chassis manual as a free download, under . .
1998 Chevy Express, cab and chassis manual .
To large a file to post here . I'll get back with the site address.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.