jefffoxsr wrote:
I have in front of me the print out from the alignment that was done today.....Thrust angle shows 0.01 degrees.
Guys just about every new alignment machine does a 4 wheel alignment. However, there are no specs loaded in the database because GM lists these rear suspensions as non-adjustable. In other words, if the axles and springs are in the right place, it is considered aligned. There are no camber/caster/toe adjustments like you see on vehicles with IRS, like our 05 Dodge Magnum.
The alignment machine did measure and report the thrust angle at .01* as the OP noted.I agree that crabbing is caused by rear axle mis-alignment, but the fact that that the suspension diagnosis and the alignment numbers don't bear that out leads me to go with the optical illusion diagnosis.