Yes they did have some issues on some. You will want to see if the recall was done on it to be sure. Here is what the customer letters said,

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Owner Letter

February 2011

Dear General Motors Customer:

This notice is sent to inform you that General Motors is conducting a Customer Satisfaction Program that affects 2007 model year GMC Acadia; Saturn OUTLOOK; 2007-2009 model year Cadillac CTS, SRX, STS; 2009 model year Buick Enclave; Chevrolet Traverse; GMC Acadia; and Saturn OUTLOOK vehicles equipped with a V6

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engine.

Your vehicle was designed and built to meet GM's high standards for quality and reliability. However, we have determined that under certain driving conditions, and with extended oil change intervals, the timing chain could wear prematurely and cause the illumination of the Service Engine Soon light.

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Timing chain wear can be affected by the age of the engine oil and driving conditions.

What We Will Do: To ensure that your vehicle will not experience this condition, your GM dealer will change the calibration of the engine control module, including the engine oil life monitor, which in most cases will recommend more frequent oil changes. This calibration change will be performed for you at no charge until February 28, 2013.

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What You Should Do: To limit any possible inconvenience, we recommend that you contact your dealer as soon as possible to schedule an appointment for this repair.

If you have any questions or need any assistance, just contact your dealer or the appropriate Customer Assistance Center at the number listed below.

We sincerely XXXXX XXXXX inconvenience or concern that this situation may cause you. We want you to know that we will do our best, throughout your ownership experience, to ensure that your GM vehicle provides you many miles of enjoyable driving.

Jim Moloney

General Director,

Customer and Relationship Services