I prefer to buy in person when I'm not sure what the product looks like. Once I find the proper parts with numbers, then I will get parts online when possible. Of course, searching on Amazon will give you great photos when you do a search, like "Lippert 3500 lb electric brake assemblies". Whatever makes you happy, but having a local source and a relationship with that source can make your life much easier when you have a problem.
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Bob & Becky
2012 3402 Montana
2012 Chevy 2500HD D/A CC
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