Chevrolet Trailblazer Starter Replace/Remove

So I Need A New Starter. Have Been Trying To Remove The Old One. All Bolts And Electrical Connections Are Disconnected. Started Moves But...

Do You Know Anything About The Ultima Brand Starter, I Need To Replace Mines Because It Went Out But Don't Know Anything About This...

I Had Bought A New Starter Off Ebay For My Vehicle For $47.00 But The Part Is Made In China. Should I Put It On When Ever The Original One...

I Have The Old Starter Out And The New One In, But I Can't Get The Nut On The Back Bolt. Any Ideas?