GM does. Oshawa Car Assembly in Ontario, Canada ,manufactures and supplies them, not just to GM.
"No, AC Delco does not manufacture any batteries specifically for motorcycles. They offer models for cars, trucks, and marine vehicles. Unfortunately you'll have to shop elsewhere for your motorcycle batteries."
AC Delco batteries are made in four power categories. There are A, AA, AAA and maximum power. One can purchase them from retailers such as Walmart and Monoprice.
Any GM dealer.
Motorcraft batteries are made by Johnson Controls. The four largest domestic battery manufacturers are Johnson Controls (Interstate, Motorcraft, Energizer, older Diehards), Delco (Sears, newer Diehards), GNB (Champion) and Exide (NAPA).
a/c delco a/c delco a/c delco
You can find more information about car batteries online at such websites as AutoZone, AC Delco Car Batteries, and Walmart. There is also a consumer report site that gives reviews on different batteries.
From what I've been told from my AC DELCO REP they are NGK plugs
Champion Filters (not connected with Champion Spark Plugs)
One may purchase cheap Delco batteries from a number of websites including "CarBatteryWorld", "AcDelco", "Amazon", "eBay" and "BatterySales". One may also consider looking at alternative brands that may provide the same amount of energy for a lower price.
There are quite a number of various places that sell Delco batteries. One example is High-Tech Battery Solutions. Another example is Autoplicity. A third example is eBay.
East Penn makes Napa batteries as well as Deka
Excide makes their batteries at this moment 11/2013.