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The best way to get GM Difficulty Code Early Model GM Vehicles1Locate the OBD (on-board diagnostic) terminal beneath the dash and just to the left of your steering column. If it really is rectangular and has 12 cavities, it's the old style, and codes is usually retrieved without having a scanner. If it really is square with pins, it can be the new style.2Place the paper clip within the far top-right terminals Obd2 scanner. Turn the ignition key to the "on" position, and make note from the verify engine light flashes. Count the amount of flashes in sequence among pauses. Each code consists of two numbers.

The quantity 12 will often flash initially. It just implies the personal computer just isn't receiving any signals indicating the automobile is operating Car Diagnostic Tools. The engine is off, so it's going to repeat this twice before preceding. A "flash, flash, flash, pause, flash" is interpreted as a code 31. It'll flash every code three instances and move on towards the next code.3Remove the paper clip when all of the codes are retrieved and turn off the ignition. Cross-reference the codes using the hyperlink beneath.

It has a listing of all the early codes and their meanings.4Repair all code problems to be able to reset the laptop or computer and turn off the light. To reset the personal computer, disconnect the unfavorable battery cable for 5 minutes and re-connect the terminal.Late Model GM Vehicles5Connect the code scanner towards the OBD port for the left of your steering column and beneath the dash. Turn the important on without starting the automobile. Press the "Read" crucial on the scanner. Make a note of any codes. Turn the key off.6Cross-reference the codes using the definitions on the web page beneath. Repair all faults prior to attempting to reset the computer system.7Turn the essential on and press the "Erase" important on the code scanner.