* Trim level: Silverado came in various trims (like Custom, Cheyenne, etc.), each with different features and therefore different prices.
* Engine: The engine choice significantly impacted the cost. A base six-cylinder would be much cheaper than a big-block V8.
* Cab style: Regular cab, extended cab, or crew cab all had different pricing.
* Options: Power steering, air conditioning, automatic transmission, different wheel packages, and numerous other options added substantially to the sticker price.
To find a potential price range, you'd need to specify the exact configuration of the truck. You could try looking at old brochures or price guides for 1977 Chevrolet trucks to get a better idea. However, even then, finding the exact price for a specific configuration will be difficult.