Generally, expect to see:
* Around 19-25 mpg in the city and 22-28 mpg on the highway. This is a broad estimate. The smaller engine options (like the 1.6L) will tend toward the higher end of this range, while the larger engine options (like the 2.0L) will tend toward the lower end. 4WD versions usually get slightly lower mileage than 2WD versions.
To get a more precise estimate, you should look up the specific EPA fuel economy estimates for the exact engine and drivetrain configuration of your 1999 Chevy Tracker. You can often find this information online using the vehicle's VIN or by searching for the fuel economy data on the EPA's website (fueleconomy.gov). Your owner's manual will also have this information.
