![]() ![]() If you have the original key, you can reset the passlock easily. How do you reset the security lock on a 1998 Chevy Silverado? Click the “Write to ECU” button in EcuFlash.Open EcuFlash and click on the folder icon at the top of the screen.Connect your computer to the car’s OBD-II port with an OpenPort cable.Download and install EcuFlash from OpenECU (see Resources).turn key to ON for 10 minutes 30 seconds.How do I reprogram or reset a new ignition cylinder with key Wait at least 10 minutes, then turn it back to the “off” position. Turn the headlight switch to the “on” position to drain the ecm of any remaining power. Slide the cable off of the battery and put it aside. Remove the nut off the negative battery cable with a socket set or wrench. Click "OK" to confirm.How do you reset the computer on a Chevy Silverado? Turn off the car's ignition after the flash is complete and you are prompted to do so. ![]() When prompted, turn on your car's ignition to the accessory position (do not run the engine) and click "OK." The new ECU image will be uploaded to the computer in your car. Choose the new computer image you wish to flash to your car's ECU.Ĭlick the "Write to ECU" button in EcuFlash. ![]() Open EcuFlash and click on the folder icon at the top of the screen. This cable allows your laptop to connect via USB to your car's computer. Be sure to obtain the OpenPort cable designed for your make of car. Install this program on a laptop computer if possible so you may take it to your car.Ĭonnect your computer to the car's OBD-II port with an OpenPort cable. This freeware program works with most cars and provides access to information stored in the car's computer, including the ability to flash a new image onto the computer. Things You'll Needĭownload and install EcuFlash from OpenECU (see Resources). If you want to add some more power under your hood, an ECU flash is a quick and inexpensive way to increase the output of your engine. Manufacturer's often under-run car engines to help increase their lifespan and fuel economy. Flashing your car's computer, or ECU, will open up many performance gains that are often restricted at the factory for various reasons. ![]()
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