GM Service Manual Online
For 1990-2009 cars only

Drive Type/Model

Service Allowed

Service Preferred

Z Trim Height: Models with torsion bar suspension must be adjusted before aligning the vehicle.

C1500

86-98 mm (3.3-3.8 in)

92 mm (3.6 in)

C1500 w/RPO's B4V/B2E

90-102 mm (3.5-4.0 in)

96 mm (3.7 in)

K1500 w/RPO B4U

90-102 mm (3.5-4.0 in)

96 mm (3.7 in)

K1500

C/K2500

C/K3500

C/K3600

110-122 mm (4.3-4.8 in)

116 mm (4.5 in)

C/K2500 w/RPO ZW9

100-112 mm (3.9-4.4 in)

106 mm (4.1 in)