EPA ratings · 1999 · GMC
1999 GMC Fuel Economy
EPA rated 10 GMC models for 1999. Each model page lists every trim's city, highway and combined figure and works the rating into a cost per mile at a price and mileage you set.
Models
| Model | Trims | Combined, lowest to highest trim |
|---|---|---|
| EV1 · plug-in | 2 | 37–85 MPGe |
| Jimmy | 4 | 14–17 MPG |
| Safari Cargo | 2 | 16 MPG |
| Safari Passenger | 2 | 15–16 MPG |
| Savana Cargo | 3 | 14–15 MPG |
| Savana Passenger | 3 | 14–15 MPG |
| Sierra | 16 | 12–17 MPG |
| Sonoma | 6 | 16–23 MPG |
| Suburban | 1 | 14 MPG |
| Yukon | 4 | 13–15 MPG |
Combined is EPA's 55% city / 45% highway blend. Electric and plug-in models show MPGe, gasoline-equivalent miles per gallon; their pages carry the kWh per 100 miles that charging cost actually turns on.
Related tools
Price the same miles on gasoline and on electricity, using your fuel price, your utility rate, and each car's rated efficiency.
Open tool →True MPG CalculatorYour car's real fuel economy from two odometer readings and a fill-up — and how far it falls from its EPA rating.
Open tool →Gas Prices by Region and StateThis week's average price of regular gasoline for the U.S., every state and ten cities, from EIA's weekly survey — a dated figure to start from, never one assumed for you.
Open tool →Electricity Prices by StateThe average residential price of electricity in every state, by month, from EIA's utility filings — and what each rate does to a mile in an electric car.
Open tool →Informational only — published averages for scale and comparison, not a quote for any pump, utility or vehicle. Your own price is the one that counts, and every calculator on this site takes it as an input.
Source: U.S. EPA and U.S. DOE, fueleconomy.gov vehicles.csv dated 2026-09-29.