Thanks Dale, Do you have the part # for the Inova? Also, is your truck a 6.7L?I bought a cheap Inova (sp?) at the Walmart and it works perfectly as far as reading codes and deleting them. It was $45. It does not display sensor data or freeze frame data. It does display pending codes, which are codes that haven't been set enough times to light the CEL. It's very easy to clear all the codes.