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)

C2500

K1500

K2500

C/K3500

C/K3600

110-122 mm (4.3-4.8 in)

116 mm (4.5 in)

K1500

Silverado SS

90-102 mm (3.5- 4.0 in)

96 mm (3.7 in)