The Chevrolet C-20, a workhorse of its era, remains a popular choice for classic truck enthusiasts and those seeking a reliable and capable vintage vehicle. However, not all C-20 model years were created equal. This guide will delve into the best and worst years for the Chevrolet C-20, providing insights to help you make an informed decision whether you're looking to buy, restore, or simply appreciate this iconic truck. Understanding the strengths and weaknesses of different model years is crucial for a satisfying ownership experience.
| Model Year | Key Strengths | Potential Weaknesses |
|---|---|---|
| 1967-1972 (Second Generation) | Highly desirable "Action Line" styling, Wide range of engine options, Simpler mechanicals for easier maintenance, Strong aftermarket support. | Prone to rust, especially in northern climates, Drum brakes can feel inadequate by modern standards, Early models (1967-1968) may have less powerful engine options. |
| 1973-1979 (Third Generation) | More modern styling, Improved comfort and ride quality, Available with powerful big-block engines, Introduction of front disc brakes. | Increased complexity compared to earlier models, Rust is a major concern, especially around the wheel wells and cab corners, Some engines suffered from emissions-related performance issues. |
| 1980-1986 (Third Generation - Continued) | Improved fuel economy with overdrive transmissions (later years), Introduction of electronic fuel injection (later years), More comfortable interiors. | Continued rust issues, Some earlier engines still suffered from emissions issues, Computer-controlled carburetors on some models can be problematic. |
| 1987-1991 (Third Generation - Continued) | Throttle Body Injection (TBI) offers improved reliability and performance, Improved interior design and ergonomics, Generally more reliable than earlier years. | Rust remains a concern, Some earlier TBI systems could be finicky, By this point, finding well-maintained examples can be challenging. |
Detailed Explanations
1967-1972 (Second Generation): The "Action Line" Era
The second generation C-20, often referred to as the "Action Line," is arguably the most sought-after. Its clean, classic styling is timeless, and the simpler mechanicals make it relatively easy to work on. These trucks were available with a variety of inline-six and small-block V8 engines, providing adequate power for most tasks. Aftermarket support is excellent, meaning parts are readily available for restoration and modification. However, these trucks are prone to rust, and the drum brakes can feel underwhelming compared to modern vehicles. Early models (1967-1968) might have less powerful engine options, so consider this if you plan on heavy hauling.
1973-1979 (Third Generation): Square Body Revolution
The third-generation C-20, known as the "Square Body," brought a more modern design and improved comfort. These trucks offered a wider range of engine options, including powerful big-block V8s, making them capable tow vehicles. The introduction of front disc brakes was a significant improvement. However, the "Square Body" era is notorious for rust issues, particularly around the wheel wells, cab corners, and along the bottom of the doors. Increased complexity compared to earlier models can make repairs more challenging. Some engines from this period also suffered from emissions-related performance issues, resulting in lower horsepower and fuel economy.
1980-1986 (Third Generation - Continued): Refining the Square Body
The 1980-1986 C-20 models saw further refinements to the "Square Body" design. Overdrive transmissions became available in later years, improving fuel economy. The introduction of electronic fuel injection (EFI) on some engines marked a step towards greater efficiency and reliability. While these models offered some improvements over the earlier "Square Bodies," rust remained a significant concern. Some engines still suffered from emissions-related issues, and the computer-controlled carburetors found on some models could be problematic, requiring specialized knowledge for diagnosis and repair.
1987-1991 (Third Generation - Continued): The TBI Advantage
The 1987-1991 C-20 trucks represent the pinnacle of the third-generation design. The switch to Throttle Body Injection (TBI) provided a significant boost in reliability and performance compared to the earlier carburetors. Interior design and ergonomics were also improved, making for a more comfortable driving experience. While rust remained a potential issue, these models are generally considered more reliable than their predecessors. The TBI system offered a good balance of fuel economy and power. Finding well-maintained examples can be a challenge, as many were used extensively as work trucks.
Frequently Asked Questions
Which C-20 year is the most reliable? Generally, the 1987-1991 models with Throttle Body Injection (TBI) are considered the most reliable due to their improved fuel system and overall refinement.
What is the best engine for a C-20? For earlier models, the 350 cubic inch small-block V8 is a popular and reliable choice. For later models with TBI, the 350 TBI is a good balance of power and fuel economy. Big block engines are great for towing but will impact fuel economy.
How do I identify rust issues on a C-20? Carefully inspect the wheel wells, cab corners, rocker panels, and floorboards for rust. Bubbling paint or visible rust are clear indicators.
Are parts readily available for C-20 trucks? Yes, aftermarket support for C-20 trucks is excellent, especially for the second and third-generation models. Many parts are available online or through specialized classic truck suppliers.
What should I look for when buying a C-20? Check for rust, engine condition, transmission function, and overall mechanical soundness. A pre-purchase inspection by a qualified mechanic is highly recommended.
Conclusion
Choosing the best Chevrolet C-20 depends on your individual needs and preferences. The "Action Line" (1967-1972) offers classic styling and simplicity, while the later "Square Body" models (1987-1991) provide improved reliability and comfort. Careful inspection for rust and a thorough mechanical evaluation are crucial when considering any vintage truck. Prioritize models with TBI for increased reliability and fuel efficiency.