Xcelerator GS Gas Powered

Gas Powered: Cadillac, Chevrolet, GMC, Hummer, Pontiac (click for specific make and models)
3 tuning settings: Performance, Towing and Economy Plug-n-play programmer with factory OBD2 connector. 2-year warranty. Description:

PPE has been a leader in performance diesel products, and now you can get our xcelerator for your gas powered vechicle with our new Xcelerator GS: Gas Series. Our Xcelerator GS offers three different power settings: Performance, towing and economy. Performance tuning gives you full power and acceleration. It advances the engine's ignition timing up to 10% (more fuel and air for max hp). It will increase shift points 4 mph. The towing setting is optimal for towing heavy loads. This advances engine timing up to 10% for maximum torque. Increases shift points 2 mph. The economy tuning will maximize your fuel economy. This setting advances engine timing 5% for the engine to work less to save fuel and allow lower octane fuel to be used.
Also, this programmer allows for one programmer for all these makes and models:

Note: “Legal in California only for racing vehicles which may never be used upon a highway.”