Remapping or chip tuning your Chevrolet requires downloading data stored on a memory chip in the Engine Control Unit (ECU). This information governs how your engine runs. This memory is known as "firmware." Firmware is an important element included in nearly all digital devices. Before 2000, car engines were tuned by mechanical means, but modern vehicles rely on electronics.
If you have a pre-2000 model Chevrolet, performance tune-ups are accomplished by chip tuning. This involves removing the ECU to access the memory chip and then changing the data stored on the chip to improve vehicle performance. For Chevrolets manufactured after 2000, remapping is the customary procedure. This is essentially the same as chip tuning, only the ECU chip data is read via an OBD/OBDII port, eliminating the need for the unit's removal from the vehicle.
In remapping, the data stored on the ECU chip is read and changed to improve the vehicle's performance via the on-board diagnostics available in modern Chevrolets. Both chip tuning and remapping procedures can improve your Chevrolet engine performance significantly by enhancing torque and mpg. After chip tuning or remapping, you will notice that your vehicle has more power and a smoother ride.