It is important to make sure the check engine light is not on when having a car inspected. A person can reset the check engine light by clearing the codes that are causing the light to go on.
You need to rent / purchase an OBD II code reader to check & reset the check engine light.
just remove the battery cable for about 5min then put it back. that should reset the check engine light.
How do i reset a service engine light on a 2005 gmc c6500 cat engine
Have vehicle scanned to have stored codes erased
unhook the battery for abt. 30 sec and re connect
To reset the service engine soon light on a 2004 GMC Envoy you can remove the ECU fuse. ECU stands for electronic control unit.
How do you reset the oil light on gmc c7500
The light is one because there is a problem with the emissions system. Once the problem is corrected the service tech will reset the light.
you need to flash the computer,
Check your gas cap.....My check Engine light always comes on if it is loose or not on at all.
First repair the problem that caused the light to come on, otherwise it will just come back on. You can try disconnecting the battery for 15 minutes and it may or may not reset the light. If this does not reset the light, you will need to access an OBD2 scan tool to be able to reset it.