Bought engine to an 05 Tahoe and purchased the extra 5 yr warranty totaling around$1400! Called when after 2 months of getting engine installed I heard, knocking and was told they do, nothing about noises so after it broke down I sent proof of a faulty engine from certified mechanic as requested. I still have not received a phine call in return only a couple times were my emails responded to! I have been, more than, patient seeing as its been years I have waited! I was with no car for a long while and eventually just ended up buying another engine elsewhere! Horrible customer service worse experience ever!