Went to the caddy dealer to get these specs and this is what they gave me:
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And here is a copy of the specs from my car:
ALIGNMENT.JPG
What I would like to find out is why the caster is on the left is so different.
Also the friendly guys at the caddy shop explained to me why the rear wheels wear on the inside. As you are all probably aware on your cars. The guy I spoke to says the chassis/unibody support on the rear of the vehicle over time slightly bows/bends due to the natural weight of the car causing the wheels to have a very negative camber. But as long as you keep the front within specs and tires rotated regularly, tire wear shouldn't be too much of a problem. But the rear control arm bushings upgrade to allow for an adjustable camber may help with this issue.