GM Service Manual Online
For 1990-2009 cars only

Base, F45, Z51

Z Height (Curb)

D Height (Curb)

J Height (Curb)

K Height (Curb)

Service Preferred

44 mm (1.73 in)

108 mm (4.25 in)

152 mm (5.98 in)

157 mm (6.18 in)

Service Allowable

50.4 mm (1.99 in) to 37.6 mm (1.48 in)

114.4 mm (4.50 in) to 101.6 mm (4.0 in)

152 mm (5.98 in)

157 mm (6.18 in)