GM Service Manual Online
For 1990-2009 cars only
Table 1: Wheel Alignment
Table 2: Z Trim Height
Table 3: D Trim Height
Table 4: Wheel Runout

Wheel Alignment

Align

Check

Set

Caster

2° ± 1°

+2° ± 0.5° (4)

Camber

0° ± 1° (2)

0° ± 0.5° (1)

Toe-In (Degrees Per Wheel)

0.05° ± 0.10° (3)

0.05° ± 0.5° (3)

Total Toe-In

0.10° ± 0.20° (3)

0.10° ± 0.10° (3)

Vehicles must be jounced three times before checking the alignment in order to eliminate false geometry readings.

For the S4WD, the front suspension Z height dimension 122 ± 6.0 mm (4.8 ± 0.2 in) left and right side should be equal within 6 mm.

    • The left and right side to be equal within 0.5 degrees.
    • The left and right side to be equal within 1.0 degrees.
    • The steering wheel must be held in the straight ahead position with ± 3.0 degrees. The front individual toe must be equalized relative to rear wheel thrust angle.
    • The GVW alignment is the same for all vehicles.

Z Trim Height

Drive Type

Dimensions

Variation*

RWD

122.0  mm± 6.0 mm (4.8 ± 0.2 in)

6 mm (0.2 in)

S4WD

122.0  mm+ 9.0 mm-6.0  mm (4.8 + 0.4 in -0.2 in)

6 mm (0.2 in)

* Acceptable ride variation for both RWD and S4WD vehicles.

D Trim Height

Model

Dimensions

Variation*

Pickup

131.5 mm to 161.5 mm (5.2 to 6.4 in)

30 mm (1.2 in)

* Acceptable ride variation for pickups.

Wheel Runout

Wheel Type

Radial

Lateral

Steel

1.015 mm (0.04 in)

1.143 mm (0.045 in)