1988 GMC S15 Pickup
US · Pickup · Small Pickup Trucks
The 1988 GMC S15 Pickup is listed in the US market as a pickup with gasoline power. Every figure below carries the source it came from, and anything our sources do not publish is left out rather than estimated.
- Engine
- Varies by configuration: 2.5L 4-cylinder (FFS), 2.8L 6-cylinder (FFS), 4.3L 6-cylinder (FFS)
- Transmission
- Varies by configuration: Automatic, Manual
- Drivetrain
- RWD
- Fuel
- Gasoline
- Economy
- 18 mpg (13.1 L/100 km) to 23 mpg (10.2 L/100 km) combined
Key Figures
Engine
| Specification | Value | Source |
|---|---|---|
| Engine | Varies by configuration: 2.5L 4-cylinder (FFS), 2.8L 6-cylinder (FFS), 4.3L 6-cylinder (FFS) | |
| Displacement | 2.5 L to 4.3 L | |
| Cylinders | 4 to 6 | |
| Fuel type | Gasoline | EPA fueleconomy.gov |
Transmission and drivetrain
| Specification | Value | Source |
|---|---|---|
| Transmission | Varies by configuration: Automatic, Manual | |
| Gears | 4 to 5 | |
| Drivetrain | RWD | EPA fueleconomy.gov |
Fuel economy and range
| Specification | Value | Source |
|---|---|---|
| Combined | 18 mpg (13.1 L/100 km) to 23 mpg (10.2 L/100 km) | EPA fueleconomy.gov |
| City | 15 mpg (15.7 L/100 km) to 21 mpg (11.2 L/100 km) | |
| Highway | 22 mpg (10.7 L/100 km) to 27 mpg (8.7 L/100 km) |
Our sources do not publish these for this vehicle: Aspiration, Power, Torque, Electric range, Battery capacity. We leave them out instead of estimating.
Trims and configurations
6 configurations listed by our sources. Engines, drivetrains and fuel economy can differ between them.
Recalls
No recall campaigns were found in NHTSA data at the last check. Last checked November 7, 2026.
Data sources
- EPA fueleconomy.gov · retrieved October 21, 2026 · US Government public data
- NHTSA vPIC · retrieved October 21, 2026 · US Government public data
Source checked: October 21, 2026
Data verified: October 21, 2026
Specifications can vary by market, trim, configuration and production date. Confirm with the manufacturer before buying parts or making safety decisions. Report an error.
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Frequently asked questions
What engine does the 1988 GMC S15 Pickup have?
Varies by configuration: 2.5L 4-cylinder ((FFS)), 2.8L 6-cylinder ((FFS)), 4.3L 6-cylinder ((FFS)). Engines can differ by trim, so check the trim list below.
What is the fuel economy of the 1988 GMC S15 Pickup?
Combined fuel economy is 18 mpg (13.1 L/100 km) to 23 mpg (10.2 L/100 km), as published by the source shown in the specification table.
Is the 1988 GMC S15 Pickup front-wheel, rear-wheel or all-wheel drive?
Drivetrain: RWD.
Are there recalls for the 1988 GMC S15 Pickup?
No recall campaigns were found in NHTSA data when we last checked on November 7, 2026. Recall status can change, so confirm with NHTSA or the manufacturer.