2005 Chevrolet Silverado 2500 HD 4WD CNGFuel Economy & MPG Ratings
Gasoline Standard Pickup Trucks 4WD4-Wheel or All-Wheel Drive
City
8
MPG
Highway
11
MPG
Combined
9
MPG
Real-World MPG
Based on 4 owner reports via EPA fueleconomy.gov
12.1MPG average+34.1% vs EPA label
EPA combined: 9 MPG · Owner reported avg: 12.1 MPG
Range: 9–14 MPG
Driving mix: City 45% / Highway 55%
Source: EPA fueleconomy.gov “Your MPG” owner submissions. Real-world results vary by driver behavior, conditions, and equipment.
Owner reported MPG for this vehicle averages 12.1 real world MPG based on 4 owner reports. EPA combined rating is 9 MPG.
Trim Comparison
Automatic 4-spd
CNG CNG
City
8
Hwy
11
Comb
9
Fuel cost: $4,950/yr
| Trim | Engine | City | Hwy | Combined | Fuel Cost/yr |
|---|---|---|---|---|---|
| Automatic 4-spd | CNG CNG | 8 | 11 | 9 | $4,950 |
Annual Fuel Cost
$4,950
Based on gasoline at $3.67/gal, 15,000 miles/year
5-Year Fuel Savings
$-12,750
vs. average new vehicle
EPA Fuel Economy Score: -1/10
GHG Score: -1/10
Environment
- CO₂ Tailpipe Emissions
- 781 g/mile
- Annual Petroleum Consumption
- 0.2 barrels
Specifications
- Engine
- 6L 8-cyl
- Transmission
- 4-speed Automatic
- Drivetrain
- AWD
- 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
- 6L, 8-cylinder
- Fuel Type
- Natural Gas
Annual Fuel Cost by State
Prices as of week ending May 18, 2026 · Source: EIA
National AvgEPA default
$4.490/gal$7,483/yr
California
$5.957/gal$9,928/yr
Texas
$3.888/gal$6,480/yr
Florida
$4.136/gal$6,893/yr
New York
$4.522/gal$7,537/yr
Ohio
$4.510/gal$7,517/yr
Washington
$5.591/gal$9,318/yr
Colorado
$4.618/gal$7,697/yr
Minnesota
$4.344/gal$7,240/yr
Massachusetts
$4.448/gal$7,413/yr
| State | Gas Price | Annual Cost | vs. National Avg |
|---|---|---|---|
| National AvgEPA default | $4.490/gal | $7,483/yr | — |
| California | $5.957/gal | $9,928/yrHIGHEST | +$2,445 |
| Texas | $3.888/gal | $6,480/yrLOWEST | $-1,003 |
| Florida | $4.136/gal | $6,893/yr | $-590 |
| New York | $4.522/gal | $7,537/yr | +$54 |
| Ohio | $4.510/gal | $7,517/yr | +$34 |
| Washington | $5.591/gal | $9,318/yr | +$1,835 |
| Colorado | $4.618/gal | $7,697/yr | +$214 |
| Minnesota | $4.344/gal | $7,240/yr | $-243 |
| Massachusetts | $4.448/gal | $7,413/yr | $-70 |
Calculated at 15,000 miles/year (EPA standard assumption) using 9 MPG combined. Regular gasoline prices. Actual costs vary.
Related
Chevrolet Silverado 2500 HD 4WD CNG MPG History
See how this model's fuel economy changed by year