To find the exact capacity for *your* specific 1968 C-10, you should:
* Check your owner's manual: This is the most reliable source.
* Consult a repair manual specific to your truck's year and engine: Chilton or Haynes manuals often list this information.
* Look for a sticker under the hood: Sometimes manufacturers place a sticker with vital fluid capacities.
Don't rely solely on online forums or general estimates; always verify with your specific vehicle's documentation. Using the incorrect amount of coolant can lead to overheating or other engine problems.