GM Service Manual Online
For 1990-2009 cars only

Drive Type/Model

Service Allowed

Service Preferred

Z Trim Height: K models must be adjusted before aligning the vehicle.

C1500

86-98 mm (3.3-3.8 in)

92 mm (3.6 in)

C2500

89-101 mm (3.5-3.9 in)

95 mm (3.7 in)

K1500

K2500

C3500

C3600

110-122 mm (4.3-4.8 in)

116 mm (4.5 in)