9-7X V8-6.0L (2008)
Alignment: Technical Service Bulletins
Alignment - Specifications/Requirements/Recommendations
Bulletin No.: 05-03-07-009B
Date: June 27, 2008
Wheel Alignment Specifications, Requirements and Recommendations for GM Vehicles
2009 and Prior GM Passenger Cars and Light Duty Trucks (Including Saturn)
2009 and Prior HUMMER H2 H3
2009 and Prior Saab 9-7X
This bulletin is being revised to add 2008 & 2009 model years. Please discard Corporate Bulletin Number 05-03-07-009A (Section 03 - Suspension).
The purpose of this bulletin is to provide retail and wholesale personnel with General Motors specifications requirements and recommendations for
wheel alignment equipment and alignment procedures.
Wheel Alignment Specifications
Technicians must refer to SI for the correct wheel alignment specifications for each vehicle. SI is the only source of GM wheel alignment specifications
that is up-to-date throughout the year.
The wheel alignment specifications loaded in any wheel alignment machine by the equipment manufacturer may be incorrect and/or outdated, even if the
dealership subscribes to the manufacturers update service. GM used to send certain manufacturers an annual update of the wheel alignment specifications
for the new model year in early summer. Certain equipment manufacturers now subscribe to GM's SI service to obtain updates for GM alignment
specifications, however, because changes to the wheel alignment specifications may occur during the model year, dealership alignment machines may or
may not be up to date with the current specifications. Therefore, it is required that the technicians refer directly to SI for the latest updates and any
changes to the wheel alignment specifications.
Using incorrect and/or outdated specifications may result in unnecessary adjustments, irregular and/or premature tire wear and repeat customer concerns.
Conditions Possibly Requiring a Wheel Alignment
Lead/pull defined as "at a constant highway speed on a typical straight road, the amount of effort required at the steering wheel to maintain the
vehicle's straight path".
Steering wheel off-center (clockwise or counterclockwise)
Unusual tire wear (slight to very slight "feathering" or "edge" wear on the shoulders of tires is NOT considered unusual and should even up with a
tire rotation at or before the next scheduled maintenance interval)
Other repairs that affect wheel alignment
Alignments must be performed with a quality alignment machine that will give accurate results when performing alignment checks. "External Reference"
(image-based camera technology) is preferred.
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)