What motor is in a 1989 Chevy S10?
The 1989 Chevy S-10 was offered mainly with two engines: a 2.5-liter inline-four Iron Duke, or a 2.8-liter V6, depending on the trim and options.
Engine options for the 1989 S-10
Two engines were commonly found in 1989 S-10 pickups. The following list covers the two primary choices.
- 2.5-liter inline-four (Iron Duke) — standard base engine in many S-10 models; lightweight and relatively efficient, typically paired with either a manual or automatic transmission.
- 2.8-liter V6 — a larger, more powerful option available on higher-trim or certain configurations; provided more torque and towing capability, and available with manual or automatic transmissions.
These two engines covered most configurations, from base two-wheel-drive models to 4x4 variants with higher towing capability.
How to identify your engine
To confirm which engine your specific S-10 has, check these indicators.
- Look for the engine code stamped on the engine block or on a label near the emissions components.
- Inspect the intake manifold and overall size of the engine bay; the 2.5L I4 is smaller and more compact, while the 2.8L V6 is noticeably larger.
- Check the glove-box VIN/Build sheet or service records for the original engine option listed by the factory.
- Consult the vehicle’s operator’s manual or the dealership bill of sale if available.
With the correct engine identification, you can source the proper parts and service information for your truck.
Maintenance and reliability notes
Maintenance considerations differ between the two engines. The following quick notes cover common care for each.
- 2.5-liter inline-four (Iron Duke) — focus on keeping the fuel system clean (especially with older throttle-body injection), regular oil changes, and ignition system upkeep; monitor cooling system components and timing chain condition if applicable.
- 2.8-liter V6 — in addition to routine oil changes and ignition checks, pay attention to cooling system wear (radiator, hoses, water pump), and the higher torque of the V6 means ensuring factory-spec transmissions and driveline components are in good shape.
Regular maintenance tailored to your engine will help keep the 1989 S-10 running reliably for years.
Summary
In short, the 1989 Chevy S-10 offered either a 2.5L inline-four Iron Duke or a 2.8L V6. Knowing which engine your truck has helps with maintenance, parts compatibility, and understanding its performance characteristics.
