Quote:
Originally Posted by ElijahBlake97
Hello,
I have a 80 gmc school bus and I'm trying to figure out what motor is In it, what it actually is, what battery and alternator it takes, and find wiring diagrams and such. I'm clearly new to this whole thing, but I need to learn. Stuck in a lowes parking lot about to get towed!!!
Any help is super appreciated. Thank you.
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Pretty sure that '80 is too early for the 6.2L Chevy/Detroit engines, which started in '83, I think.
As far as batteries go, it should take the largest truck battery you can find, other than the 18-wheeler tractor batteries. I think they're called "Group 24" size batteries; you'll probably need two of them, although if you're using the Big-Block gasser motors, you should be able to start with just one.
As far as the alternator goes, you can probably use an alternator off a 1980 C60, although if you locate your VIN plate--usually on the driver's side above or below the window, or in that general area--it should also disclose the GMC chassis model. This is because GM will sell Bluebird or whoever either a frame with a motor and steering wheel, or a van-cutaway specifically for the purpose of adding a bus chassis on top of it.
If you take the GM chassis model into an auto parts store like Oreilly's or NAPA, they should be able to locate an exact-replacement for the stock alternator on your bus. And that goes for pretty much any replacement part that is attached and necessary to the "vehicle" part of the bus; so brakes, suspension, exhaust, filters, fluids, et cetera.
So my particular bus is based on the GM P30 platform, which is essentially a medium-duty version of their 1-ton C/K 30 platform, but the parts are still available at auto parts stores when I walk in, because I know what to tell them when they ask "what vehicle?"
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