GM Service Manual Online
For 1990-2009 cars only

Model

Option

Service Allowed

Service Preferred

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

C 1500

Extended, Extended Short, Short Box and Crew Cab, Crew Cab Short, Short Box

w/o WSS

w/NHT, B2E

110-122 mm (4.3-4.8 in)

116 mm (4.5 in)

K 1500

All

All

110-122 mm (4.3-4.8 in)

116 mm (4.5 in)

C/K 2500

All

w/o ZW9

110-122 mm (4.3-4.8 in)

116 mm (4.5 in)

K 3500

All

All

110-122 mm (4.3-4.8 in)

116 mm (4.5 in)

C 3500

Extended and Crew Cab

All

110-122 mm (4.3-4.8 in)

116 mm (4.5 in)

C/K 3600

All

All

110-122 mm (4.3-4.8 in)

116 mm (4.5 in)

C 3500

Standard

All

100-122 mm (3.9-4.4 in)

106 mm (4.1 in)

C/K 2500

All

w/ZW9

100-122 mm (3.9-4.4 in)

106 mm (4.1 in)

C 1500

Crew Cab Short, Short Box/Extended Cab

W/QSS, B2E, B4U, B4V

90-102 mm (3.5-4.0 in)

96 mm (3.7 in)

C 1500

Standard, Extended, and Crew Cab

w/o NHT, B2E, B4V, B4U

86-98 mm (3.3-3.8 in)

92 mm (3.6 in)