So I went to start my car this past friday and It wouldn't even crank. The lights, radio and air work. The car has been sitting for a week. Before that I took it for a long trip to California (700 miles round trip) with absolutely no issues. I took the battery out and put it in my other camaro and it fired right up. What are some other things that I can check or roll out before i have to admit defeat and have it towed to a shop?

Thanks,
Eric