K 1500 Suburban 4WD V8-5.3L VIN Z Flex Fuel (2003)
Alignment: Service and Repair
Front Wheel Alignment
FRONT CASTER AND CAMBER ADJUSTMENT
1. Caster is relative to frame, the caster values must be compensated for the measured frame angle by using a digital protractor or equivalent on a flat
portion of the frame in front of the rear tire.
Or, measure both sides of the frame and take an average from those measurements.
IMPORTANT: The measured frame angle must be compensated for in the caster values .
2. Frame angle is positive when higher in the rear. Then add the average frame angle to the caster reading when making adjustments.
3. Frame angle is negative when lower in the rear. Then subtract the average frame angle from the caster reading when making adjustments.
4. The caster and camber adjustments are made by rotating the offset cam bolt and the cam in the slotted frame bracket in order to reposition the
control arm.
Note: For an accurate reading, do not push or pull on the tires during the alignment process.
IMPORTANT:
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Before adjusting the caster and camber angles, jounce the front bumper three times to allow the vehicle to return to normal height.
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Measure and adjust the caster and the camber with the vehicle at curb height. The front suspension Z dimension is indicated in Trim Heights.
Refer to Trim Height Inspection Procedure in Suspension General Diagnosis.
5. Determine the caster angle (2). Be sure to compensate for frame angle where required.