Table of Contents
How do you reset the computer on a GMC Sierra?
How to Clear a GMC ECM
- Loosen the bolt on the black battery cable until the connector opens enough to come off the battery stud.
- Turn the headlights on for several seconds to use up any stored power, then return them to the “off” position.
How do I reset my anti theft system GMC?
How to Reset the Passlock System on GM Cars
- Insert your key in the starter, start you car as you usually would and let it stall. Keep the key in the “On” position.
- Wait until the “Theft Sys” light on your dashboard stays on without blinking. This will take approximately 10 to 15 minutes.
How do I turn off anti theft on my GMC Sierra?
To reset the 2015 gmc sierra theft deterrent system unlock the driver’s side door with the key and then lock it, and then unlock it again and the system should be cleared.
How do I reset my ECM?
How to Reset a Car Computer
- Open up the hood.
- Remove the positive terminal cable from the battery using your pliers or wrench.
- Go to your fuse box in your car, and look at the diagram.
- Keep the car disconnected like this for two to three minutes to clear the computer’s memory.
- Insert the fuse back in to the box.
How do you reset the ECM on a Chevy truck?
Remove the nut off the negative battery cable with a socket set or wrench. Slide the cable off of the battery and put it aside. Turn the headlight switch to the “on” position to drain the ecm of any remaining power. Wait at least 10 minutes, then turn it back to the “off” position.
How do I reprogram my ECM Chevy?
Switch to programming mode Check if the vehicle OBDII interface is connected correctly. Switch on the ignition, but do not start the engine yet. Select Discover Vehicle from the Tools menu, then select Program Engine ECU when the window pops up and click OK. Select ENGINE ECU Program to enter programming mode.
How do you reset the computer on a GMC?
GMC vehicles use an on-board diagnostic–or OBD-style–port that accepts a special tool called an OBD scan tool. This scan tool can be purchased from most auto parts stores and is required to reset the vehicle’s computer. Open the door on your GMC vehicle and locate the port to the left of the fuse panel.
Do you need to reset the computer on a Chevy Silverado?
The Chevrolet Silverado is no exception: its computer allows this workhorse to be as practical and effective as it is. Therefore, resetting the Computer on your Chevy Silverado can sometimes be a necessary task. Occasionally, you might need to reset the computer in order to erase any stored codes and restore optimum performance.
When do I need to Reset my Car Computer?
Resetting your car computer will do no harm to your vehicle and should always be done when any replacements are installed like a fuel filter, knock sensor even you when after work on your car air conditioning or any diagnostics are performed . Do not hesitate to check your repair manuals or the owners manual if you want to replace your vehicle ECM.
What to do if your GMC Truck wont start?
If the vehicle won’t start, check your scan tool for a VTD (Vehicle Theft Deterrent) Fail-Enable Mode trouble code, or if the security light on the dash is illuminated. If you have this code, then the vehicle probably is equipped with a BCM, and you must perform a relearn.