GM Service Manual Online
For 1990-2009 cars only

Z Trim Height Specifications

Model

Service Allowed

Service Preferred

C1, 2, 3

89.0 to 101 mm (3.5 to 4.0 in)

95 mm (3.7 in)

K1, 2 (except K10906 with L65 or K20906 with C6P)

151 to 163 mm (5.9 to 6.4 in)

157 mm (6.2 in)

K1, 2 (K10906 with L65 or K20906 with C6P)

139 to 151 mm (5.5 to 5.9 in)

145 mm (5.7 in)

K3

139 to 151 mm (5.5 to 5.9 in)

145 mm (5.7 in)