GM Service Manual Online
For 1990-2009 cars only

Object Number: 1257100  Size: SF
(1)Part Number
(2)Serial Number
(3)Model Code
(4)Manufactured Nation and Company

The ZF 4HP 16 transmissions have a metal identification nameplate attached to the case exterior next to the transmission oil pan. The information on the nameplate assists the technician in servicing the transmission and ordering replacement parts from a GM Parts Catalog.