What engine does a 1990 Chevy truck have?

In 1990, Chevrolet offered several engines across its truck lineup; there isn’t a single engine for all models. Common options included the 4.3L V6, the 5.0L V8, the 5.7L V8, and, in select heavy‑duty configurations, a 6.2L diesel. The exact engine depended on the model (full-size C/K trucks vs. the S‑10 compact) and the trim level.

Engine options for the 1990 Chevy C/K full‑size pickups

The full-size C/K pickups carried the largest share of Chevrolet’s engine choices for the 1990 model year. Here are the typical powerplants you might find on these trucks:

• 4.3L V6 (262 cu in) — a common base engine across many C/K trims


• 5.0L V8 (305 cu in) — widely used in mid‑range configurations


• 5.7L V8 (350 cu in) — available on higher trims and heavier payload setups


• 6.2L V8 diesel — offered on select heavy‑duty configurations

In short, most 1990 C/K trucks could be ordered with a V6 or V8 gasoline engine, with a diesel option on certain models.

Engine options for the 1990 Chevy S‑10 compact pickup

The S‑10 compact pickup offered a more streamlined engine lineup suited to lighter duty and efficiency. Typical options included the following powerplants:

• 2.5L inline‑4 (I4)


• 2.8L V6

These engines were chosen to balance payload with fuel economy in the smaller pickup segment. As with the full‑size trucks, exact engine availability could vary by trim and region.

How to verify which engine is in your 1990 Chevy truck

Knowing the exact engine in a specific 1990 Chevy truck often requires checking a few indicators, especially if the vehicle has changed hands or trims over the years.

• Inspect the engine block and valve covers for the displacement (for example, "4.3L" or "5.7L") stamped or labeled on metal surfaces.


• Look for the emission/engine code label in the engine bay or on the radiator support; this label lists the engine type and displacement.


• Check the Vehicle Identification Number (VIN) and cross‑reference the eighth digit or a build sheet/SPID label to confirm the original engine code.


• Review the window sticker or dealership build documents if available; those records typically enumerate the factory engine.

Note that engines can be swapped or replaced over a vehicle’s lifetime, so verifying via multiple sources helps confirm the current and original powerplants.

Notes on engine swaps and documentation

Because 1990 Chevy trucks were widely used and often customized, some individual trucks may have engines swapped by previous owners. If you’re evaluating a used truck, rely on both physical markings (engine block, labels) and official records (VIN cross‑check, SPID/build sheet, and dealer documentation) to determine the precise engine configuration.

Summary

For the 1990 model year, Chevrolet offered multiple engines across its trucks. Full‑size C/K pickups commonly featured 4.3L V6, 5.0L V8, 5.7L V8, and select diesel 6.2L options, while the S‑10 compact typically used a 2.5L I4 or a 2.8L V6. Always verify the exact engine with on‑vehicle markings and official records, as configurations can vary by model, trim, and any prior substitutions.

How much horsepower does a 1990 Chevy truck have?

Engine

Horsepower	160 hp @ 4,000 rpm
Torque	235 lb-ft @ 2,400 rpm

Is a 5.7 Chevy engine a 350?

Yes, the Chevy 5.7 is a 350. The "5.7" refers to its displacement in liters, which is equivalent to 350 cubic inches (cid), a name that has been used for this popular Chevy engine for decades. 
You can watch this video to learn about the 5.7L Chevrolet V8 engine: 54s2stroketurboYouTube · Feb 8, 2013

• The "5.7" is the metric measurement, while "350" is the imperial measurement, with both referring to the same engine size. 
• This engine is part of the Chevrolet small-block V8 family and has been produced in various forms since 1967. 
• Because there are many variations of the 5.7L/350 engine, it's important to verify specific details like the block casting or fuel delivery system when working on one, notes JustAnswer. 

This video explains the different versions of the 5.7L Chevrolet V8 engine: 1mRichard HoldenerYouTube · Feb 1, 2022

Is the Chevy 4.3 L V6 a good engine?

Yes, the Chevy 4.3L V6 is generally considered a good and reliable engine, known for its longevity and durability, especially with proper maintenance. While older versions can have issues with fuel injection systems, and newer versions have had some problems with Active Fuel Management (AFM), the core engine block and internals are very strong. It's a dependable and easy-to-maintain engine, with many owners reporting high mileage without major issues.
 
Pros of the 4.3L V6

• Reliable and durable: The engine is known for its solid and reliable design, with many examples reaching 250,000 to 300,000 miles and beyond on the original block and internal parts. 
• Easy to maintain: It is relatively simple to work on, and parts are readily available and affordable. 
• Good for its class: It provides ample power for daily driving and light hauling, though it may not be the fastest engine on the market. 

Common issues and considerations

• Older models (TBI/CPI): Some older versions with the Central Point Injection (CPI) system can have issues with the "spider" injector, but replacing the system is often straightforward and inexpensive. 
• Newer models (EcoTec3):
  • Active Fuel Management (AFM): Newer versions of the engine feature AFM, which has been known to cause lifter and other issues, though the 4.3L generally fares better than the larger V8s. Disabling AFM with a device is recommended to prevent potential problems. 
  • Direct Injection: Direct injection can lead to carbon buildup on intake valves and issues with the fuel system. Installing a catch can can help mitigate these problems by reducing oil recirculation. 
• Fuel efficiency: While not as poor as some other engines, its fuel economy isn't considered great by modern standards, especially on the highway. 

How to ensure longevity

• Maintain proper maintenance: Regularly changing oil and filters is crucial for the engine's health. 
• Address issues promptly: Be sure to replace any worn or failing components, such as the water pump or distributor, as they wear out. 
• Consider disabling AFM: On newer models, disabling AFM can prevent potential long-term engine damage. 

What motor is in a 1990 Chevy 1500?

Powertrain details
Engine design	Engine family	Production
4.3 L (262 cu in) V6	Chevrolet 90° V6 engine (Vortec V6)	1990
1991–1993
1994