To reset the computer in a 2015 GMC Sierra, you can disconnect the negative battery cable for about 10-15 minutes, which clears the vehicle's computer memory. After reconnecting the battery, turn the ignition to the "ON" position without starting the engine for a few seconds, then start the vehicle. This process helps reset the engine control unit and can clear any stored trouble codes. Always ensure you have any necessary radio or electronic codes before disconnecting the battery.
I cannot get a reading from computer port?
The factory alarm on a GMC Sierra pickup truck can be reset by removing the fuse. Take the fuse out for 10 seconds and replace it. This will reset the alarm.
where is the fuel pump reset button or relay switch located on a gmc sierra 2003 and how do i get to it?
Gmc does not use inertia/reset switches.
Remove the positive terminal cable from the battery using your pliers or wrench.
unhook battery, step on brake pedal, wait 30 mins.
Gm vehicles do not have inertia/reset switches.
There is none.
GM vehicles do not use inertia/reset switches
Transmission control system malfunction
Have vehicle scanned to have stored codes erased
No. Gmc doesn't use reset switches. The fuel system is computer controlled with relays.