One problem related to engine cooling system 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.
Purchased 2005 Cadillac Cts may 30, 2005. At first new owner check up I complained of a knocking noise under the drivers front side. Coastal Cadillac in pawley island, SC could not hear anything wrong. Made another appointment June 16, 2005 as we took a trip and my husband heard the thumping. They finally located the problem, a broken front strut, which took 3 days to replace. At that time I voiced my concerns about this vehicle and asked for a new car. The answer was no. Now on sept 2, 2005 my "check coolant level" message came on. I now have a leak in the coolant reservoir. The car only had 2,789 miles at the time. I am not looking forward to calling the dealer about this problem and thought I could just purchase coolant and fill it. I thought that this should not be occurring in such a new vehicle.