1970 Chevrolet C20 problems

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The third generation of the C/K series is a range of trucks that was manufactured by General Motors from the 1973 to 1991 model years. Serving as the replacement for the "Action Line" C/K trucks, GM designated the generation under "Rounded Line" moniker. Again offered as a two-door pickup truck and chassis cab, the Rounded Line trucks marked the introduction of a four-door cab configuration.

Marketed under the Chevrolet and GMC brands, the Rounded Line C/K chassis also served as the basis of GM full-size SUVs, including the Chevrolet/GMC Suburban wagon and the off-road oriented Chevrolet K5 Blazer/GMC Jimmy. The generation also shared body commonality with GM medium-duty commercial trucks.

In early 1987, GM introduced the 1988 fourth-generation C/K to replace the Rounded Line generation, with the company beginning a multi-year transition between the two generations. To eliminate model overlap, the Rounded Line C/K was renamed the R/V series, which remained as a basis for full-size SUVs and heavier-duty pickup trucks. After an 18-year production run (exceeded only in longevity by the Dodge D/W-series/Ram pickup and the Jeep Gladiator/Pickup), the Rounded Line generation was retired after the 1991 model year.

From 1972 to 1991, General Motors produced the Rounded Line C/K (later R/V) series in multiple facilities across the United States and Canada. In South America, the model line was produced in Argentina and Brazil, ending in 1997.

1970 Chevrolet C20

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Common 1970 Chevrolet C20 problems

Based on the information provided in the sources, here are common problems with the Chevrolet C20 1970 based on complaints from owners:

  • Rust Concerns: Rust is a common issue in older vehicles like the Chevrolet C20. Areas where rust can occur include the toe board meeting the rocker and the drip rail, which may require repair work.
  • Electrical Problems: Complaints have been made about electrical issues, such as misfiring, malfunctioning lights, and aftermarket accessories like tachometers not working correctly. These issues can be challenging to diagnose and resolve.
  • Suspension and Brake Upgrades: While the Chevrolet C20 Longhorn had decent features, some owners recommend adding power steering, power brakes, front discs, and other upgrades for better performance and driving experience.
  • Maintenance Costs: Despite being reliable, maintenance costs for the Chevrolet C20 can vary. While some models are affordable to maintain, others may require more investment, especially for older vehicles with specific issues like rust or electrical problems.

These common problems highlight the need for regular maintenance, thorough inspections, and potential upgrades to ensure the Chevrolet C20 1970 remains in good working condition for its owners.

1970 Chevrolet C20 engine

What is the mpg on a 1970 C20?

MMP Rating

Engine Specifications
Transmission Type:3-speed manual, 4-speed manual, 3-speed automatic
Fuel and Efficiency
Fuel System Type:Carburetor
MPG:Estimated 10-12 mpg

What is the difference between a 1970 C10 and C20?

The obvious difference between the C10 and the C20 is that one is a half-ton and the other a three-quarter-ton truck. These classifications don't refer to their respective curb weights, but rather to their payload capacity.

What engine does a Chevy C20 have?

Specifications for Chevrolet C20 Regular Cab 5.7 V8 Hydra-Matic, 167hp, 1985 4-speed.

What is the difference between C10 and C20 suspension?

A C-10 is a 1/2 ton truck with the wishbone/coil spring suspension in the rear. A C-20 is a 3/4 ton truck with leaf spring suspension in the rear.

What is the difference between a 1970 C10 and C20?

The obvious difference between the C10 and the C20 is that one is a half-ton and the other a three-quarter-ton truck. These classifications don't refer to their respective curb weights, but rather to their payload capacity.

What engine does a Chevy C20 have?

Specifications for Chevrolet C20 Regular Cab 5.7 V8 Hydra-Matic, 167hp, 1985 4-speed.

What is the difference between C10 and C20 suspension?

A C-10 is a 1/2 ton truck with the wishbone/coil spring suspension in the rear. A C-20 is a 3/4 ton truck with leaf spring suspension in the rear.

What is the mpg on a 1970 C20?

MMP Rating

Engine Specifications
Transmission Type:3-speed manual, 4-speed manual, 3-speed automatic
Fuel and Efficiency
Fuel System Type:Carburetor
MPG:Estimated 10-12 mpg

1970 Chevrolet C20 car problems categorized by type of issue

After analyzing all complaints sent to the NHTSA and researching popular Chevrolet C20 problems, we found that the most common problems with these 2023 model year vehicles are:

  • Tires problems

The graph below shows statistics for all 1970 Chevrolet C20 vehicle components and the number of complaints received.

1970 Chevrolet C20 complaints

The NHTSA has received 1 complaints about various vehicle components related to the 1970 Chevrolet C20.

2004-11-25

TIRES PROBLEM

  • Date Of Incident: 2004-07-31
  • Components: TIRES
  • Summary: DRIVING DOWN INTERSTATE 80 EAST OF WEST LIBERTY, IA. RIGHT REAR TIRE SEPARATED AND TREAD FLEW OFF AND COMPLETELY BLEW APART NEARLY UPSETTING THE VEHICLE. ALSO FOUND LEFT REAR TIRE TO BE FLAWED AND READY TO BLOW. COST US DEARLY AS WE WERE 225 MILES FROM HOME AND IT WAS VERY LATE ON A SATURDAY EVENING. HAVE FILED A COMPLAINT WITH COOPER TIRE ADN RUBBER COMPANY. WE HAVE COMPLIED WITH THEIR CLAIM DEMANDS, SUCH AS PROVIDING THE TIRE, PICTURES, AND ESTIMATES. THEY TOLD US THEY WOULD BE IN TOUCH WITHIN 30 DAYS, AND THAT WAS BACK IN AUGUST. WE HAVE NOT HEARD FROM THEM. OUR CLAIM NUMBER WITH COOPER IS L2004-08-0196. *AK

1970 Chevrolet C20 recalls

The National Highway Traffic Safety Administration (NHTSA) has issued 1 recalls for different components of the 1970 Chevrolet C20.

1970-09-08
  • Manufacturer: GENERAL MOTORS CORP.
  • Components: SUSPENSION:FRONT:CONTROL ARM:UPPER ARM
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