1984 GMC C15 Pickup Specs
16 powertrain configurations on federal record for the 1984 GMC C15 Pickup: 4.1L 6-cyl Regular Gasoline; 5.0L 8-cyl Regular Gasoline; 6.2L 8-cyl Diesel, rated up to 20 MPG combined by the EPA.
Source: EPA federal records (fueleconomy.gov) · Updated 2026-10-26 · By CarWhere Research
| Engine | Transmission | Drivetrain | City | Highway | Combined |
|---|---|---|---|---|---|
| 4.1L 6-cyl Regular Gasoline | Automatic 3-spd | 2-Wheel Drive | 14 | 17 | 15 |
| 4.1L 6-cyl Regular Gasoline | Automatic 4-spd | 2-Wheel Drive | 15 | 19 | 16 |
| 4.1L 6-cyl Regular Gasoline | Manual 3-spd | 2-Wheel Drive | 15 | 19 | 17 |
| 4.1L 6-cyl Regular Gasoline | Manual 4-spd | 2-Wheel Drive | 15 | 20 | 17 |
| 5.0L 8-cyl Regular Gasoline | Automatic 3-spd | 2-Wheel Drive | 13 | 16 | 14 |
| 5.0L 8-cyl Regular Gasoline | Automatic 4-spd | 2-Wheel Drive | 14 | 18 | 15 |
| 5.0L 8-cyl Regular Gasoline | Manual 3-spd | 2-Wheel Drive | 14 | 17 | 15 |
| 5.0L 8-cyl Regular Gasoline | Manual 4-spd | 2-Wheel Drive | 15 | 17 | 16 |
| 6.2L 8-cyl Diesel | Automatic 4-spd | 2-Wheel Drive | 17 | 22 | 19 |
| 6.2L 8-cyl Diesel | Manual 4-spd | 2-Wheel Drive | 18 | 22 | 20 |
| 6.2L 8-cyl Diesel | Manual 4-spd | 2-Wheel Drive | 18 | 20 | 19 |
| 4.1L 6-cyl Regular Gasoline | Automatic 4-spd | 2-Wheel Drive | 14 | 17 | 15 |
| 4.1L 6-cyl Regular Gasoline | Manual 3-spd | 2-Wheel Drive | 14 | 17 | 15 |
| 4.1L 6-cyl Regular Gasoline | Manual 4-spd | 2-Wheel Drive | 14 | 18 | 15 |
| 5.0L 8-cyl Regular Gasoline | Automatic 4-spd | 2-Wheel Drive | 13 | 17 | 14 |
| 5.0L 8-cyl Regular Gasoline | Manual 4-spd | 2-Wheel Drive | 14 | 17 | 15 |
C15 Pickup by year
Buying a used C15 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 1984 GMC C15 Pickup have?
3 engines on federal record: 4.1L 6-cyl Regular Gasoline; 5.0L 8-cyl Regular Gasoline; 6.2L 8-cyl Diesel, offered with Automatic 3-spd, Automatic 4-spd, Manual 3-spd, Manual 4-spd and 2-Wheel Drive. The full per-configuration table is above.
What gas mileage does the 1984 GMC C15 Pickup get?
EPA combined ratings run 14–20 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 1984 GMC C15 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).