GM Service Manual Online
For 1990-2009 cars only

Wheel Alignment Specifications RWD Pick-up

Model

Caster (degrees)

Camber (degrees)

Sum Toe (degrees)

Z  height (mm/in)

Steering Wheel Angle (degrees)

Important: Jounce the vehicle 3 times before checking the alignment in order to eliminate false geometry readings.

Important: The caster angle must be corrected to the level frame angle.

15 Series-Target Left Side

3.75

0.25

0.1

--

0

15 Series-Target Right Side

4.00

0.25

0.1

--

0

15 Series-Allowable Left Side

2.75-4.75

-0.25-0.75

-0.1-0.3

--

-5.0-5.0

15 Series-Allowable Right Side

3.00-5.00

-0.25-0.75

-0.1-0.3

--

-5.0-5.0

25 Series-Target Left Side

4.50

0.25

0.1

--

0

25 Series-Target Right Side

4.75

0.25

0.1

--

0

25 Series-Allowable Left Side

3.50-5.50

-0.25-0.75

-0.1-0.3

--

-5.0-5.0

25 Series-Allowable Right Side

3.75-5.75

-0.25-0.75

-0.1-0.3

--

-5.0-5.0

    • Down in the rear frame angles must be subtracted from a positive caster reading.
    • Up in the rear frame angles must be added to a positive caster reading.
    • Down in the rear frame angles must be added to a negative caster reading.
    • Up in the rear frame angles must be subtracted from a negative caster reading.

Object Number: 156339  Size: SH

The front suspension Z dimension (4) is held as indicated.

Steering Wheel Pull

Use the cross camber and cross caster figures from your alignment equipment and compare them with the following charts. The shaded areas are within the allowable specification for steering wheel pull.

15 Series Vehicle


Object Number: 623020  Size: MF
(1)Cross Camber in Degrees
(2)Cross Caster in Degrees

25 Series Vehicle


Object Number: 623021  Size: MF
(1)Cross Camber in Degrees
(2)Cross Caster in Degrees

Wheel Alignment Specifications 4WD Pick-up

Model

Caster degrees

Camber degrees

Sum Toe degrees

Z height (mm/in)

Steering Wheel Angle degrees

Important: Jounce the vehicle 3 times before checking the alignment in order to eliminate false geometry readings.

Important: The caster angle must be corrected to the level frame angle.

15 Series-Target Left Side

4.25

0.25

0.1

116 4.6

0

15 Series-Target Right Side

4.75

0.25

0.1

116 4.6

0

15 Series-Allowable Left Side

3.25-5.25

-0.25-0.75

-0.1-0.3

110-122 4.3-4.8

-5.0-5.0

15 Series-Allowable Right Side

3.75-5.75

-0.25-0.75

-0.1-0.3

110-122 4.3-4.8

-5.0-5.0

25 Series-Target Left Side

4.25

0.25

0.1

116 (4.6

0

25 Series-Target Right Side

4.75

0.25

0.1

116 (4.6

0

25 Series-Allowable Left Side

3.25-5.25

-0.25-0.75

-0.1-0.3

110-122 4.3-4.8

-5.0-5.0

25 Series-Allowable Right Side

3.75-5.75

-0.25-0.75

-0.1-0.3

110-122 4.3-4.8

-5.0-5.0

    • Down in the rear frame angles must be subtracted from a positive caster reading.
    • Up in the rear frame angles must be added to a positive caster reading.
    • Down in the rear frame angles must be added to a negative caster reading.
    • Up in the rear frame angles must be subtracted from a negative caster reading.

Object Number: 156339  Size: SH

The front suspension Z dimension (4) is held as indicated.

Steering Wheel Pull

Use the cross camber and cross caster figures from your alignment equipment and compare them with the following charts. The shaded areas are within the allowable specification for steering wheel pull.

15 Series Vehicles


Object Number: 623022  Size: MF
(1)Cross Camber in Degrees
(2)Cross Caster in Degrees

25 Series Vehicles


Object Number: 625323  Size: MF
(1)Cross Camber in Degrees
(2)Cross Caster in Degrees

Wheel Alignment Specifications RWD Utilities

Model

Caster (degrees)

Camber (degrees)

Sum Toe (degrees)

Z  height (mm/in)

Steering Wheel Angle (degrees)

Important: Jounce the vehicle 3 times before checking the alignment in order to eliminate false geometry readings.

Important: The caster angle must be corrected to the level frame angle.

15 Series-Target Left Side

4.25

0.25

0.1

116 4.6

0

15 Series-Target Right Side

4.75

0.25

0.1

116 4.6

0

15 Series-Allowable Left Side

3.25-5.25

-0.25-0.75

-0.1-0.3

110-122 4.3-4.8

-5.0-5.0

15 Series-Allowable Right Side

3.75-5.75

-0.25-0.75

-0.1-0.3

110-122 4.3-4.8

-5.0-5.0

25 Series-Target Left Side

4.50

0.25

0.1

--

0

25 Series-Target Right Side

4.75

0.25

0.1

--

0

25 Series-Allowable Left Side

3.50-5.50

-0.25-0.75

-0.1-0.3

--

-5.0-5.0

25 Series-Allowable Right Side

3.75-5.75

-0.25-0.75

-0.1-0.3

--

-5.0-5.0

    • Down in the rear frame angles must be subtracted from a positive caster reading.
    • Up in the rear frame angles must be added to a positive caster reading.
    • Down in the rear frame angles must be added to a negative caster reading.
    • Up in the rear frame angles must be subtracted from a negative caster reading.

Object Number: 156339  Size: SH

The front suspension Z dimension (4) is held as indicated.

Steering Wheel Pull

Use the cross camber and cross caster figures from your alignment equipment and compare them with the following charts. The shaded areas are within the allowable specification for steering wheel pull.

15 Series Vehicle


Object Number: 623020  Size: MF
(1)Cross Camber in Degrees
(2)Cross Caster in Degrees

25 Series Vehicle


Object Number: 623021  Size: MF
(1)Cross Camber in Degrees
(2)Cross Caster in Degrees

Wheel Alignment Specifications 4WD Utilities

Model

Caster degrees

Camber degrees

Sum Toe degrees

Z height (mm/in)

Steering Wheel Angle degrees

Important: Jounce the vehicle 3 times before checking the alignment in order to eliminate false geometry readings.

Important: The caster angle must be corrected to the level frame angle.

15 Series-Target Left Side

4.25

0.25

0.1

116 (4.6)

0

15 Series-Target Right Side

4.75

0.25

0.1

116 (4.6)

0

15 Series-Allowable Left Side

3.25-5.25

-0.25-0.75

-0.1-0.3

110-122 (4.3-4.8)

-5.0-5.0

15 Series-Allowable Right Side

3.75-5.75

-0.25-0.75

-0.1-0.3

110-122 (4.3-4.8)

-5.0-5.0

25 Series-Target Left Side

4.25

0.25

0.1

116 (4.6)

0

25 Series-Target Right Side

4.75

0.25

0.1

116 (4.6)

0

25 Series-Allowable Left Side

3.25-5.25

-0.25-0.75

-0.1-0.3

110-122 (4.3-4.8)

-5.0-5.0

25 Series-Allowable Right Side

3.25-5.25

-0.25-0.75

-0.1-0.3

110-122 (4.3-4.8)

-5.0-5.0

    • Down in the rear frame angles must be subtracted from a positive caster reading.
    • Up in the rear frame angles must be added to a positive caster reading.
    • Down in the rear frame angles must be added to a negative caster reading.
    • Up in the rear frame angles must be subtracted from a negative caster reading.

Object Number: 156339  Size: SH

The front suspension Z dimension (4) is held as indicated.

Steering Wheel Pull

Use the cross camber and cross caster figures from your alignment equipment and compare them with the following charts. The shaded areas are within the allowable specification for steering wheel pull.

15 Series Vehicles


Object Number: 623022  Size: MF
(1)Cross Camber in Degrees
(2)Cross Caster in Degrees

25 Series Vehicles


Object Number: 625323  Size: MF
(1)Cross Camber in Degrees
(2)Cross Caster in Degrees