Hi Jan. I recently inherited my Fathers TTA and I am trying to find the build #. GM referred me to gmmediaachchives who said they would send me an invoice go $60 but can't tell me if it has the build number on it. I am new to TTA. Com so I sent an email and Chris K suggested I send you my vin #. I hope you can help. Vin#1G5FW2170KL246930. Thank You for your time.