1988 GMC C25 Pickup 2WDFuel Economy & MPG Ratings
Diesel Standard Pickup TrucksRear-Wheel Drive
City
16
MPG
Highway
23
MPG
Combined
19
MPG
Trim Comparison
Automatic 4-spd
Diesel Diesel
City
16
Hwy
23
Comb
19
Fuel cost: $4,450/yr
Manual 4-spd
Diesel Diesel
City
18
Hwy
21
Comb
19
Fuel cost: $4,450/yr
Automatic 4-spd
Regular
City
15
Hwy
20
Comb
17
Fuel cost: $3,950/yr
Manual 5-spd
Regular
City
15
Hwy
21
Comb
17
Fuel cost: $3,950/yr
Automatic 3-spd
Regular
City
15
Hwy
18
Comb
16
Fuel cost: $4,200/yr
Manual 4-spd
Regular
City
14
Hwy
17
Comb
15
Fuel cost: $4,500/yr
Manual 5-spd
Regular
City
13
Hwy
18
Comb
15
Fuel cost: $4,500/yr
Automatic 4-spd
Regular
City
13
Hwy
18
Comb
15
Fuel cost: $4,500/yr
Automatic 4-spd
Regular
City
13
Hwy
18
Comb
15
Fuel cost: $4,500/yr
Manual 5-spd
Regular
City
12
Hwy
17
Comb
14
Fuel cost: $4,800/yr
Automatic 3-spd
Regular
City
13
Hwy
15
Comb
14
Fuel cost: $4,800/yr
Manual 4-spd
Regular
City
12
Hwy
15
Comb
13
Fuel cost: $5,200/yr
| Trim | Engine | City | Hwy | Combined | Fuel Cost/yr |
|---|---|---|---|---|---|
| Automatic 4-spd | Diesel Diesel | 16 | 23 | 19 | $4,450 |
| Manual 4-spd | Diesel Diesel | 18 | 21 | 19 | $4,450 |
| Automatic 4-spd | Regular | 15 | 20 | 17 | $3,950 |
| Manual 5-spd | Regular | 15 | 21 | 17 | $3,950 |
| Automatic 3-spd | Regular | 15 | 18 | 16 | $4,200 |
| Manual 4-spd | Regular | 14 | 17 | 15 | $4,500 |
| Manual 5-spd | Regular | 13 | 18 | 15 | $4,500 |
| Automatic 4-spd | Regular | 13 | 18 | 15 | $4,500 |
| Automatic 4-spd | Regular | 13 | 18 | 15 | $4,500 |
| Manual 5-spd | Regular | 12 | 17 | 14 | $4,800 |
| Automatic 3-spd | Regular | 13 | 15 | 14 | $4,800 |
| Manual 4-spd | Regular | 12 | 15 | 13 | $5,200 |
Annual Fuel Cost
$4,450
Based on gasoline at $3.67/gal, 15,000 miles/year
5-Year Fuel Savings
$-10,250
vs. average new vehicle
EPA Fuel Economy Score: -1/10
GHG Score: -1/10
Environment
- CO₂ Tailpipe Emissions
- 536 g/mile
- Annual Petroleum Consumption
- 18.8 barrels
Specifications
- Engine
- 6.2L 6-cyl
- Transmission
- 3-speed Automatic
- Drivetrain
- RWD
- Body Style
- Pickup Truck
- GVWR
- Class 2-3 (6,001–10,000 lbs)
Source: EPA fuel economy data & NHTSA vPIC. Specifications reflect the most common trim configuration.
Engine & Efficiency Details
Source: EPA fueleconomy.gov
- Engine Size
- 6.2L, 8-cylinder
- Induction Type
- (NO-CAT)
- Fuel Type
- Diesel
Annual Fuel Cost by State
Prices as of week ending May 18, 2026 · Source: EIA
National AvgEPA default
$4.490/gal$3,545/yr
California
$5.957/gal$4,703/yr
Texas
$3.888/gal$3,069/yr
Florida
$4.136/gal$3,265/yr
New York
$4.522/gal$3,570/yr
Ohio
$4.510/gal$3,561/yr
Washington
$5.591/gal$4,414/yr
Colorado
$4.618/gal$3,646/yr
Minnesota
$4.344/gal$3,429/yr
Massachusetts
$4.448/gal$3,512/yr
| State | Gas Price | Annual Cost | vs. National Avg |
|---|---|---|---|
| National AvgEPA default | $4.490/gal | $3,545/yr | — |
| California | $5.957/gal | $4,703/yrHIGHEST | +$1,158 |
| Texas | $3.888/gal | $3,069/yrLOWEST | $-476 |
| Florida | $4.136/gal | $3,265/yr | $-280 |
| New York | $4.522/gal | $3,570/yr | +$25 |
| Ohio | $4.510/gal | $3,561/yr | +$16 |
| Washington | $5.591/gal | $4,414/yr | +$869 |
| Colorado | $4.618/gal | $3,646/yr | +$101 |
| Minnesota | $4.344/gal | $3,429/yr | $-116 |
| Massachusetts | $4.448/gal | $3,512/yr | $-33 |
Calculated at 15,000 miles/year (EPA standard assumption) using 19 MPG combined. Regular gasoline prices. Actual costs vary.
Related
GMC C25 Pickup 2WD MPG History
See how this model's fuel economy changed by year