I have had the rack & pinion steering rack replaced 2 times since I've owned the vehicle (bought new in July 2008) dealership replaced both after getting ugly with them, now at 75,000 miles transmission went out, replaced it. Got it back from dealer and now the steering locks up when turning, usually happens when taking off from a stop and then it finally unlocks as your trying to turn with excessive force. Feels like the power steering just goes out for a few seconds and then comes back. Have just dealt with it last few weeks, but now after not able to turn and hit a curb while turning, there is obviously something defective. Doing research on this there is numerous complaints about the steering locking up, this is very dangerous if its defective. Paying 45K for a vehicle you shouldn't have to argue with the dealer on replacing this part. Is there something being done to fix this issue. I have almost come to a decision that GM doesn't stand behind their product and have about given up on them.

- Kennewick, WA, USA

Cause code: 6021 - component damaged/cracked, reverse clutch plate replacement reading various forums, these seems to be a problem with all lambada platforms, hundreds if not thousands of transmission failures, creating a major safety concern for myself and the public. GM needs to replace these trannys with a new more durable/reliable design before someone is seriously injured or killed, its only a matter of time. Please confront GM with these complaints...thx townhall-talk.edmunds.com/webx/.F215073?displayrecent.

- Etobicoke , NY, USA

My power steering groans and moans when turning at low speeds. Turning the wheel is very difficult even for me being a male. The noise is very annoying and may affect the steering. The car is for my family of three kids and wife --- not sure they should be driving this anymore. I called the a GMC service dealer and they said they have heard of "very similar issues" waiting back to hear if they will repair this. I've had too many repairs lately for a car with only 58K miles -- one sway bar, another sway bar, transmission issue, headlamp issue, faulty thermostat, limited life brake pads, now power steering issues! ugh!

- Racine, WI, USA

Purchased a 2008 GMC Acadia sle on Oct. 23, 2008. Took it to the dealer on Nov. 20, 2008 because "check engine" light came on. Informed that the cam shaft was bad, and that the cam & both headers would need replacing. Vehicle has just slightly over 2,000 miles. Discovered through the service department, and internet chat forums this is a common problem with this vehicle. Vehicle is still at the dealer, repairs not complete yet. It appears this problem has been on going since the 2007 model year(first year of production). Why hasn't GM addressed this problem? it appears that they are just standing by, and putting the burden on the consumer.

- Chesapeake, VA, USA