Hello, I have come across an interesting conundrum. Right now I have a '07 TB LS (4.2i), '07 Saab 9-7x (4.2i), and '08 TBSS. All three of these vehicles have a different ratio steering rack; 20.1:1, 18.5:1 and 16.0:1. I am wanting to get a reman rack for the Saab as its leaking bad and worn out. When shopping for racks for these vehicles it seem like no one (AC Delco, Advance Auto, AutoZone, Amazon, etc) recognizes the variety of racks. They treat every vehicle the same and show the same part number for the three above vehicles. I understand that they all swap and I could technically install whichever I'd like, but I also believe that a change in ratio would affect the stability control system, as for a given steering wheel position, the front tires would be at different angles based on rack ratio. Anyway, long story short, does anyone have part numbers for the three racks or a way to choose the correct ratio. I feel like I am taking crazy pills. Even GM diagrams don't clarify this issue.