What Fuel Economy Or Tuner Changes Can Be Expected On 2003 GMC Yukon XL

Updated 04/11/2016 | Published 04/06/2016

Question:

What engine tuner/chip fuel economy changes can be expected on a 6.0 liter gas in a 2003 yukon xl thank you

asked by: Jt M

Expert Reply:

When using a tuner like the Flashpaq Performance Tuner, part # SU2845 on your 2003 Yukon XL, you can expect about 10 to 15 percent gain in fuel economy when your truck is tuned for the Mileage XS Save tune. You can gain up to 18 additional horsepower and 17 ft/lbs of torque depending on the tune you choose.

This tuner plugs into the OBD-ll port and features a hand held device. This system lets you monitor your engine data to keep track of engine and transmission performance.

Some of the tunes available with this unit are heavy or light load, mileage XS Save, Performance, or stock with options. Not all tunes, features, or monitored parameters are available for all applications. Available features and parameters will pop up automatically on the display once the Flashpaq is plugged into your GMC Yukon XL.

This product is not for use in the state of California. It does not comply with laws passed by the California Air Resource Board.

expert reply by: Jeffrey L