I would like to let everyone know that if you're questioning G7 services and reliability I would highly recommend them. I sent them a Tcm from a 2012 Chevy sonic, they sent it back with a detailed note stating the unit didn't have to be opened because hardware all tested OK. After I reinstalled it it did not work. I emailed them and they got back to me within 12 hours, they resolved the problem with a full refund. I had to purchase a new Tcm to repair auto. Thanks for the excellent service, they do back there work!