Automatic Transmission Cooler Problems of GMC Sierra 2500

I purchase this truck 2/03/17 and have used it until 2 weeks age when the brake lines broke in my driveway, I am having the lines replaced with stainless lines at a cost of about $1200 ( I am not sure of the total cost because it also needs a antilock braking pump which was badly corroded) the fuel lings are also rusted and need to be replaced and also the transmission cooling lines need to be replaced at a cost to be determined later. I have a 1953 chevy pickup that still has good brake lines and the frame is in better shape than the newer ones, if gm looked to the past at the materials & methods they might build a better product rather than the garbage they produce now! I am glad I didn't pay $30-$60,000 for this truck.

See all problems of the 2002 GMC Sierra 2500 🔎.

First the transmission cooling lines rusted out costing over 400. 00 to repair. Today the brake lines failed because of rust. This will be a very expensive repair. I was fortunate that I was able to avoid crashing the truck when the brakes failed.

The contact owns a 2002 GMC Sierra 2500. The contact stated he noticed an unusual fluid on the ground under the vehicle. Upon further inspection, the contact found that the transmission fluid line cooler metal clip was corroded. The contact stated the corrosion penetrated the transmission line and caused the fluid leak. The dealer advised having the vehicle diagnosed before proceeding with any repairs. The vehicle was not repaired. The failure and current mileages were 52,000.

Went to GMC dealer because truck has a transmission oil leak. Technician noted that all three transmission oil cooler line are leaking. . Read more...

See all problems of the 2006 GMC Sierra 2500 🔎.

I have a 2006 GMC sierra that has had transmission lines replaced and that keep having to be replaced because of hose leaking every year.

Transmission cooler line leaking transmission fluid at an aluminum crimp that connects a rubber hose to the transmission cooler; an inferior design. As such, a transmission oil leak is a fire hazard. I am aware of two car fires that were caused by leaking transmission cooler lines. The last one involved a Ford taurus station wagon where the owner had the transmission rebuilt by his local transmission shop (a national franchise transmission repair shop) and they cross-threaded the lower cooler line at the transmission. The transmission fluid leaked on to the exhaust cross-over pipe and the car burned to the ground on the side of road in the interstate. The owner's insurance company subrogated against the transmission shop for the damages. Fortunately, no one got hurt, but they came close.

I have a 2006 GMC 2500hd that has 31000 miles on it. The transmission cool er lines are leaking and the dealer has been notified about this problem. The new parts are on backorder, meanwhile the truck leaks transmission oil on the ground which could be a potential fire hazard alone with an environmental hazard. Many GMC 2500hd owners are having this problem. This is not yet a recall but needs to be addressed.