1999 GMC Suburban 1500 2WD MPG & Specs — Real Fuel Cost
Quick answer
The 1999 GMC Suburban 1500 2WD gets an EPA-estimated 12/17 MPG (city/highway) and 14 MPG combined, with an estimated $4,400/year fuel cost and 634.786 g/mi CO₂. Engine: 5.7 L 8-cyl.
The 1999 GMC Suburban 1500 2WD with the 5.7-liter 8-cylinder regular gasoline engine returns an EPA-estimated 12 MPG in the city and 17 MPG on the highway, for a combined 14 MPG. This page summarizes the official EPA fuel-economy and emissions data for this configuration.
| Engine | 5.7 L 8-cyl |
| Transmission | Automatic 4-spd |
| Drive | Rear-Wheel Drive |
| Fuel type | Regular Gasoline |
| Vehicle class | Sport Utility Vehicle - 2WD |
| MPG — city | 12 |
| MPG — highway | 17 |
| MPG — combined | 14 |
| Annual fuel cost* | $4,400 |
| CO₂ tailpipe | 634.786 g/mi |
| EPA GHG score | — |
How efficient is it?
With a combined 14 MPG, the 1999 GMC Suburban 1500 2WD sits in the low range for fuel economy. That is roughly 27% thirstier than the typical Sport Utility Vehicle - 2WD of its era (19 MPG class average) — expect higher fuel bills than class-average alternatives.
Fuel economy and running costs
At about $4,400 per year in fuel (EPA estimate, 15,000 mi/yr), fuel is a major part of the cost of owning the 1999 GMC Suburban 1500 2WD. Over five years that is roughly $22,000 at today's prices — before insurance, maintenance, and depreciation.
Emissions
The 1999 GMC Suburban 1500 2WD emits approximately 634.786 grams of CO₂ per mile at the tailpipe. Lower emissions generally track higher fuel economy.
How to read these numbers
EPA figures come from standardized laboratory test cycles and are the same estimates shown on the vehicle's window sticker. Your real-world mileage depends on driving style, conditions, fuel grade, and maintenance. Use combined MPG and annual fuel cost to compare vehicles fairly.