How do you reset the PCM on a GM car?
When the PCM detects a problem with one or more of the vehicle’s components or systems it stores a trouble code in its internal memory and illuminates a malfunction indicator light (MIL) on the dashboard. An automotive scan tool is required to clear the codes and reset the PCM. Shift the vehicle’s transmission into park or first gear.
How to reset a GM Powertrain Control Module?
How to Reset a GM PCM. The powertrain control module (PCM) in General Motors vehicles is the main computer responsible for controlling most of the vehicle’s computerized components including the engine, transmission and drivetrain.
How do you reset the computer on a GMC?
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. Plug the electrical connector from the OBD scan tool into the OBD port. Turn the ignition key to the “II” position.
How does the BCM work on a GMC Truck?
In order for the vehicle to start, the BCM (as well as the Passkey module in other vehicles) must identify the resistor pellet in the key, then the BCM sends a password to the PCM. If this password matches the password stored in the PCM, the system enables fuel delivery.
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. Plug the electrical connector from the OBD scan tool into the OBD port. Turn the ignition key to the “II” position.
What happens to transmission when the PCM is reset?
Transmission performance may be affected as new TAPs are learned. Learning can only take place when the PCM has determined that an acceptable shift has occurred. The PCM must also relearn TAP values if it is replaced. Powered by phpBB © phpBB Group. phpBB Mobile / SEO by Artodia .
Is there a way to reset the engine control module?
There are a few ways to reset your Engine control modules. One way is by disconnecting the battery cable for 2 to 3 minutes and waiting to see if the check engine light comes back on upon reconnecting the battery and start the car.
What to do if your GMC Truck wont start?
No relearn is necessary. In this situation, the vehicle will start and run with no problem. 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.