Check the GM OBD2 code list to find out what the codes mean on your car. >> NEXT STEP: https://www.obdadvisor.com/codes/ Visit our site, and type the code in the search box. You will get more information about the code including causes, symptoms, fixes, and repair costs. Reading and clearing the codes will become easier with a scan tool. >> READ MORE: https://www.obdadvisor.com/gm-scan-tool-review/ This article shows a helpful in-depth review of the 7 best OBD2 scan tools for your GM. In fact, GM-specific scanners generally perform better than universal ones, simply because they are made specifically for a particular car brand. It helps to exactly diagnose your vehicle and cut the repair cost.