I'm brand new to the forum, so if I should be posting elsewhere on this site, please overlook it. I learned today that my 2010 Enclave that just tolled over 100,000 miles has a "stretched" timing chain requiring a $2,700 repair at the local Buick dealer. In another post, a member said the 2010 Enclaves had a 120,000 mile warranty on the timing chain. Can someone verify this? Also, it seems that earlier models had a timing chain problem but was thought to be corrected by 2010. I'm wondering if I may have an early 2010 with a 2009 engine. Is this a possibility? Has anyone else had a timing chain problem with a 2010?