As someone else already explained, the truck is a 1/2 ton, 2 wheel drive, conventional cab GMC, which is the same as a C15 GMC, C10 Chevy. GM...
If your engine is original, its a very easy swap to a Goodwrench 350 (about 240 HP) or a GM Performance Products 350 (290 HP). These are...
The saddle tanks aren't quite as dangerous as was reported, and you can mount two 20 gallon tanks and switch between them. However, you can...
On a 3 speed, the backup light switch is mounted on the column. If you switched to a granny four you need a backup light switch on the shift...
I replaced the speedo on my '75 with one from the junkyard, and most of them looked about the same. My '75 has a 100 mph scale. Mine also had...
-I replaced the drag link (parts stores call it the inner tie rod) on my 75 GMC K25 4x4 and it helped a lot to tighten up the steering. Total...
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