1985 GMC S15 Pickup Specs

13 powertrain configurations on federal record for the 1985 GMC S15 Pickup: 2.2L 4-cyl Diesel; 2.8L 6-cyl Regular Gasoline; 1.9L 4-cyl Regular Gasoline; 2.5L 4-cyl Regular Gasoline, rated up to 28 MPG combined by the EPA.

Source: EPA federal records (fueleconomy.gov) · Updated 2026-10-26 · By CarWhere Research

1985 GMC S15 Pickup engines, transmissions, drivetrains and EPA gas mileage
Engine	Transmission	Drivetrain	City	Highway	Combined
2.2L 4-cyl Diesel	Manual 4-spd	Rear-Wheel Drive	26	30	27
2.2L 4-cyl Diesel	Manual 5-spd	Rear-Wheel Drive	25	30	27
2.8L 6-cyl Regular Gasoline	Automatic 4-spd	Rear-Wheel Drive	17	23	19
2.8L 6-cyl Regular Gasoline	Manual 4-spd	Rear-Wheel Drive	17	23	19
2.8L 6-cyl Regular Gasoline	Manual 5-spd	Rear-Wheel Drive	16	23	19
1.9L 4-cyl Regular Gasoline	Manual 4-spd	Rear-Wheel Drive	21	27	23
2.2L 4-cyl Diesel	Manual 4-spd	Rear-Wheel Drive	26	31	28
2.2L 4-cyl Diesel	Manual 5-spd	Rear-Wheel Drive	26	33	28
2.5L 4-cyl Regular Gasoline	Automatic 4-spd	Rear-Wheel Drive	18	25	21
2.5L 4-cyl Regular Gasoline	Manual 4-spd	Rear-Wheel Drive	19	24	21
2.5L 4-cyl Regular Gasoline	Manual 5-spd	Rear-Wheel Drive	20	26	22
2.8L 6-cyl Regular Gasoline	Automatic 4-spd	Rear-Wheel Drive	15	22	18
2.8L 6-cyl Regular Gasoline	Manual 5-spd	Rear-Wheel Drive	15	23	18

S15 Pickup by year

1990 1989 1988 1987 1986 1985 1984

Buying a used S15 Pickup? Specs are the easy half.

then check the specific car: the Full VIN Report shows that VIN's factory build, recall record, and market history before you pay for it.

Frequently asked questions

What engines does the 1985 GMC S15 Pickup have?

4 engines on federal record: 2.2L 4-cyl Diesel; 2.8L 6-cyl Regular Gasoline; 1.9L 4-cyl Regular Gasoline; 2.5L 4-cyl Regular Gasoline, offered with Manual 4-spd, Manual 5-spd, Automatic 4-spd and Rear-Wheel Drive. The full per-configuration table is above.

What gas mileage does the 1985 GMC S15 Pickup get?

EPA combined ratings run 18–28 MPG depending on configuration — the table above shows city/highway/combined for each engine, transmission, and drivetrain.

How do I get the specs for my exact VIN?

These are the federal-record configurations for the 1985 GMC S15 Pickup overall. For one specific vehicle — its exact engine, trim, factory options, and original window sticker — decode the 17-character VIN free at carwhere.com/tools/vin-decoder.

Where does this data come from?

The U.S. EPA's public vehicle dataset (fueleconomy.gov) — the federal record of every US-market configuration since 1984 — refreshed 2026-10-26. Public-domain data; republish with attribution to CarWhere (carwhere.com).