One problem related to engine rattling and whining sounds has been reported for the 2005 Cadillac CTS. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Cadillac CTS based on all problems reported for the 2005 CTS.
I have a 2005 Cadillac Cts with 67,000 miles. Since about 65,000 miles car has been makeing a rattling sound under the hood during accelaration. I have given the car a tune up, oil change and the car has other fluids are at level. Once my car has accelarated and the gears have changed (I. E, second gear) the rattling sounds stops. . The noice is continuous and only happens at accelaration, not while idleing. In addition every now and again when a front seat passenger gets in the car the airbag sensor/light comes on the dashboard. This problem doesn't happen often but it happens every once in a while. Upon doing my research for both these issues I find that I am not the only one haveing this problem. . . Hopefully something will be done so that gm can address these serious issues without having the consumer/owners haveing to pay an arm and a leg.