What engine does a 1977 C10 have?
The 1977 C10 could be equipped with several engines, with the 350 cubic inch V8 being the most common. Other available options included the 305 cu in V8, the 250 cu in inline-six, and, in select configurations, a 400 cu in big-block.
In detail, Chevrolet offered a mix of inline-six and V8 engines for the C10 in 1977. The 250 cubic inch inline-six was a durable, economical choice used across many GM trucks of the era. The 305 cu in V8 (5.0 L) and the 350 cu in V8 (5.7 L) were the typical V8 options, with the 350 being the workhorse most buyers opted for. A 400 cu in big-block was also available on certain packages, though it was less common due to cost and fuel economy considerations in the late 1970s. Availability varied by cab/bed configuration and trim level.
The following engine options were commonly seen on 1977 C10 pickups. The exact engine in a given truck can be determined by checking the VIN engine code and the SPID window option sticker, or by inspecting the engine block markings.
- 250 cubic inch inline-six (4.1 L) — a durable, economical option used across many GM trucks of the era.
- 305 cubic inch V8 (5.0 L) — a small-block V8 offering a balance of power and efficiency.
- 350 cubic inch V8 (5.7 L) — the most common engine in 1977 C10s, prized for overall versatility.
- 400 cubic inch big-block V8 (6.6 L) — available in select configurations for higher performance trucks.
Conclusion: The exact engine in a 1977 C10 varies by build sheet and option package. When evaluating a specific vehicle, confirm the original engine through the VIN engine code, the build sheet, or the SPID tag to ensure you know the displacement and configuration you’re dealing with.
Summary
In short, a 1977 Chevrolet C10 could have several engines under the hood, with the 350 cu in V8 being the prevalent choice, accompanied by the 305 V8, the 250 inline-six, and, in certain configurations, the 400 big-block. Always verify the exact engine on the vehicle you’re assessing via official codes and documentation.
