LaCrosse V6-3.8L (2009)
available, measurements may also be clearly and legibly handwritten into the Wheel Alignment Repair Order Questionnaire attached to this
4. Attach the Wheel Alignment Repair Order Questionnaire below along with the print-out of "Before" and "After" wheel alignment measurements to
the Repair Order and retain for use by GM.
Wheel Alignment Equipment and Process
Wheel alignments must be performed with a quality machine that will give accurate results when performing checks. "External Reference" (image-based
camera technology) is preferred. Please refer to Corporate Bulletin Number 05-00-89-029B: General Motors Dealership Critical Equipment
Requirements and Recommendations.
Computerized four wheel alignment system.
Computer capable of printing before and after alignment reports.
Computer capable of time and date stamp printout.
Racking system must have jacking capability
Racking system must be capable of level to 1.6 mm (1/16 in)
Appropriate wheel stops and safety certification
Built-in turn plates and slip plates
Wheel clamps capable of attaching to 20" or larger wheels
Racking capable of accepting any GM passenger car or light duty truck
Operator properly trained and ASE-certified (U.S. only) in wheel alignment
Racking should have front and rear jacking capability.
Equipment Maintenance and Calibration:
Alignment machines must be regularly calibrated in order to give correct information. Most manufacturers recommend the following:
Alignment machines with "internal reference" sensors should be checked (and calibrated, if necessary) every six months.
Alignment machines with "external reference" (image-based camera technology) should be checked (and calibrated, if necessary) once a year.
Racks must be kept level to within 1.6 mm (1/16 in).
If any instrument that is part of the alignment machine is dropped or damaged in some way, check the calibration immediately.
Check with the manufacturer of your specific equipment for their recommended service/calibration schedule.
Wheel Alignment Process
When performing wheel alignment measurement and/or adjustment, the following steps should be taken:
1. Verify that the vehicle has a full tank of fuel (compensate as necessary).
2. Inspect the wheels and the tires for damage.
3. Inspect the tires for the proper inflation and irregular tire wear.
4. Inspect the wheel bearings for excessive play.
5. Inspect all suspension and steering parts for looseness, wear, or damage.
6. Inspect the steering wheel for excessive drag or poor return due to stiff or rusted linkage or suspension components.
7. Inspect the vehicle trim height.
8. Compensate for frame angle on targeted vehicles (refer to Wheel Alignment Specifications in SI).
Satisfactory vehicle operation may occur over a wide range of alignment angles. However, if the wheel alignment angles are not within the range of
specifications, adjust the wheel alignment to the specifications. Refer to Wheel Alignment Specifications in SI. Give consideration to excess loads, such
as tool boxes, sample cases, etc. Follow the wheel alignment equipment manufacturer's instructions.
Prior to making any adjustments to wheel alignment on a vehicle, technicians must verify that the wheel alignment specifications loaded into
their wheel alignment machine are up-to-date by comparing these to the wheel alignment specifications for the appropriate model and model
year in SI. Using incorrect and/or outdated specifications may result in unnecessary adjustments, irregular and/or premature tire wear and
repeat customer concerns