PUB 31-1000465 For models PWE23, CWE23, ZWE23, GYS22, GNE29, GYE22, PFE28, GFE28, PFD28, PYE22, PYD22, DFE28, GFD28, CFE28, and CYE22 GYS22, GNE29, GYE22, PFE28K, GFE28, PFD28, PYE22K, PYD22, DFE28, and GFD28  PFE28P, PYE22P, CFE28U, and CYE22U Also includes correction bulletin PUB REF08-20