The Texan wrote:
To make a blanket statement that Costco GC-2 is a Johnson Control battery is misleading. Around our neck of the woods and as far south as AZ, they are mostly Interstate batteries with a variant thrown in once in awhile. The ones in our coach, bought in southern AZ, and the ones in our local Costco are Interstate and plainly marked as such.
To add to the mix, if you have a local Interstate factory store, they will match the local Costco price every time on their batteries. I replaced our coach chassis batteries this year and got a quote from Costco, then went to the Interstate store and had them installed at the same price.
The interstate dealer near me will not touch a Sam's interstate. I was told they are mfg to Sam's specs and are not as good of quality as the ones sold @ the interstate store. BS or truth I'm not sure.