In '08 models of the GM vehicles sharing the "Lambda" platform including Enclave, Traverse and Acadia, GM built the V-6 using a defective timing chain.
These chains are prone to stretching which throws a trouble code 1st or causes major engine damage. GM/Buick's solution is to re-program the on-board oil life monitor to advise owners to change oil more frequently which will not fix anything. If the vehicle is still under warranty when the chains stretch, they will be replaced with completely different part numbers.
If not under warranty you are screwed for about a $4-$5K repair.
GM refuses to do a recall and there should be a class action pn this issue. Cargo door latch, steering squeaks
Look at Consumer Reports for its ratings on quality as well but you will have nothing but expensive repairs for the early model years. GM knows this but fails to support their customer base. They wanted new customers and got them but we are now leavaing. In later model years it looks ike they have fixed some of the problems but I would not feel comfortable after this kind of hell. I have had (2) transmissions (I paid for one $3200), rack n pion steering ~$1600, power steering pump ~$1200, shocks and struts at 75K miles (too early)- ~$1K, several steering related componens~$500 all within six months ($7.5K). The vehicle is only worth $18K. Be very cautious.
We purchased our 2008 Buick Enclave in late 2007. It was My wife's dream vehicle until the problems began i.e. Sunroof leaking,trans slipping,rattlle in rear drivers side,liftgate opens on it's own,service airbags light on twice, traction contol light on twice, reduced power on the highway three times,steering wheel rubbing noise,service stability light on,left front stabilizer is loose,air conditioning has been serviced twice for leaking and noise,front shocks replaced,brake rubbing noise,power steering pump leaking,front timing cover gasket leaking,right rear door weather stripping coming loose,noise while driving 50-60 mph on highway.washer heater causes fires, Don't buy this vehicle!
The Enclave is a great car and I do not like speaking ill about it, but our vehicle has been very disappointing in terms of reliability. We thankfully purchased it under warranty at 30K and it required a new power steering pump, rack and pinion, a radio, and other minor repairs all covered under warranty. Since then, several issues have come up which were not under warranty. The moonroof was leaking and require an $800+ repair for a new seal and replacement of some of the drainage channels. The heating actuator failed to the tune of $400+ in repairs. I was quoted a cost of $200 to replace the key FOB which went bad. Overall, not what I expect from a "luxury vehicle" in terms of quality.
Bought this car used. According to car fax it was maintained. Worst car I've ever owned. I have one problem after another. As soon as one thing is fixed another goes bad. I'm exhausted worrying about this car. It depresses me. After this experience I wouldn't even recommend a new one. I wish I could just get rid of it. DO NOT BUY ONE.