Expert Answers about Cadillac STS

• Roof Cargo Options for a Cadillac 2009 STS Four Door
• The best option I can recommend for you is the Cargo Bag # RL100S30. This cargo bag can be used on any style of roof. From full roof racks with crossbars to completely naked roofs. The SportRack Vista XL Cargo Box # SR7018 that you referenced will require cross bars, and since your vehicle does not have cross bars and we do not sell a roof rack for your vehicle that would give you cross bars I cannot recommend you attempt to use this cargo box.
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• Rubber Adjuster Recommendation for Use with Glacier Chains PW1042
• Rubber tensioners for the Glacier Chains part # PW1042 are available but they do not come with the chains. You would want the part # PW99 for if you have 16-19 inch rims or part # PW97 for 19-1/2 inch to 24-1/2 inch rims. I attached an install video for you to check out as well.
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