Transmission Fluid Leaking problems of the 2008 Chevrolet Silverado 2500

I have replaced transmission cooler lines twice (2 times), since purchasing this truck with 59k miles on it. Both times with ac delco parts. Both times the transmission cooler lines leaked, not an installation problem. 11/21/13- I first noticed it when driving at 25 mph picking up my kids from school, and I had transmission fluid spraying out from underneath my truck, causing it to smoke/smolder on my exhaust pipe. (transmission fluid is flammable). The crimp has separated from the hose. This is the first time I replaced with genuine gm parts. 1/16-14- 2nd time was during the winter when the truck was warming up in the drive way and yet again the crimp was causing a leak, which dumped about a gallon of fluid on my driveway. (again transmission fluid is flammable) I replaced the lines one more time and I'm about fed up with the lack of help gm is giving. The current set of cooler lines on the truck are just now starting to drip so its only a matter of time before they give out again. The truck has very low miles and I meticulously maintained, this is a known gm problem on more than 1 model of vehicle and I am unsure why gm will not extend a warranty to these failed parts. My local gm service dept. Has refused to help me in any way, even though I have bought gm part every time. When will gm face the facts before one of these catches fire and someone dies????.

Transmission fluid leaking from crimps where metal ends are attached to rubber hoses.

My truck was diagnosed at the dealer with all of the transmission cooler lines leaking, at the crimps. Nearly everyone I know that has a 2007-2009 has had the same issue. If undiagnosed, this could lead to transmission failure due to fluid loss, loss of pressure, etc. Clearly a manufacturing defect, no diagnosis of cause due to elements or driver error, etc.

The contact owns a 2008 Chevrolet Silverado 2500. The contact stated that the transmission was leaking fluid and the vehicle would stall without warning. The dealer and the manufacturer were contacted, but denied any assistance with repairs to the vehicle. The vehicle was not repaired. The failure mileage was 38,000 and the current mileage was 41,000.

Automatic transmission lines 2008 chevy silverado with allison transmission. Factory transmission lines leak and must be replaced. When the weather turns cold, the lines/crimps holding the rubber hose to the pipes fail and automatic transmission fluid is lost, sometimes in catastrophic manner, causing the vehicle to loose propulsion. Reports of failure are extremely common, and it is not unusual, that the lines may have been replaced 3 times within the 1st 50,000 miles. Gm has issued 'new, updated' parts, but they are no better than the original parts. The new part numbers are 20759971, 20759972, 20759973. Wile repair is covered on the 36k bumper to bumper warranty, there is no coverage on the 100k warranty. Gm should replace the lines free of charge for the 1st 100k miles with a hose that will not fail. Consumers can take the original gm line to a hydraulic shop, have the rubber portion of the lines replaced with standard hydraulic hose suitable for atf fluid and there are no further failures. If consumers can fix the lines, perhaps gm can find a solution.