What years do the 1999 suburban EGR valves interchange (SB350)?
i looked up an egr for a chevy truck 1999 5.7L and got these EGR valve OEM numbers: Note: O.E.M. #17096188, 17113278, 17113405 to test-> locate test chart EGR1 in Wells test manual and got this: http://cgi.ebay.com/ebaymotors/93-05…QQcmdZViewItem there is a really long list of interchangeable ones in that ebay listing 😀 chevy and gmc and buick and caddy and so on also i found that they sell a repair screen gasket kit for these later model egr valves- for 8.50 http://bbb-carb.com/Klean_Screen/Gmc.htm could be clogged up maybe that is all that is wrong with his- if there really is anything wrong with it good luck!