Leaking Trans coolers line and oil cooler line.HELP!

bgum wrote:
Check for recall as my Duramax had same issue and was recalled.

Are you sure it was a recall and not just a service bulletin. A recall is for safety and is initiated by nhtsa and is done on all models within a serial number range for free -in or out of warranty. A service bulletin is a known issue with the fix but isn't free for off warranty trucks.