First I got one of their module a year and a half ago and it saved my 92 Toronado and it never had problems anymore and it runs like the wind. A month ago I bought a second module for my 99 Alero and tried and didn't work and Jack and Justin in New Rockies helped me find the problem that was in the ecm. They refunded me the module immediately! I don't understand why some people in these comments say they don't refund I have lots of facebook friends that installed their module and they are as happy as children at christmas. There kind and go many miles to help you and after all that help for a month they found my real problem and refunded the module. They saved my cars twice and the second one wasn't even with their module but they did it! Guys, where do you find a company like this today! Where!?