1990 GMC S15 Jimmy Specs
4 powertrain configurations on federal record for the 1990 GMC S15 Jimmy: 4.3L 6-cyl Regular Gasoline, in Rear-Wheel Drive and 4-Wheel or All-Wheel Drive, rated up to 18 MPG combined by the EPA.
Source: EPA federal records (fueleconomy.gov) · Updated 2026-10-26 · By CarWhere Research
| Engine | Transmission | Drivetrain | City | Highway | Combined |
|---|---|---|---|---|---|
| 4.3L 6-cyl Regular Gasoline | Automatic 4-spd | Rear-Wheel Drive | 16 | 22 | 18 |
| 4.3L 6-cyl Regular Gasoline | Manual 5-spd | Rear-Wheel Drive | 15 | 22 | 18 |
| 4.3L 6-cyl Regular Gasoline | Automatic 4-spd | 4-Wheel or All-Wheel Drive | 15 | 20 | 17 |
| 4.3L 6-cyl Regular Gasoline | Manual 5-spd | 4-Wheel or All-Wheel Drive | 15 | 18 | 16 |
S15 Jimmy by year
Buying a used S15 Jimmy? 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 1990 GMC S15 Jimmy have?
One powertrain on federal record: 4.3L 6-cyl Regular Gasoline, offered with Automatic 4-spd, Manual 5-spd and Rear-Wheel Drive or 4-Wheel or All-Wheel Drive. The full per-configuration table is above.
What gas mileage does the 1990 GMC S15 Jimmy get?
EPA combined ratings run 16–18 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 1990 GMC S15 Jimmy 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).