Three problems related to automatic transmission cooler have been reported for the 2006 GMC Sierra 3500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 GMC Sierra 3500 based on all problems reported for the 2006 Sierra 3500.
Transmission cooling lines leaking.
The contact owns a 2006 GMC Sierra 3500. While examining the vehicle he noticed fluid leaking from under the front passenger side of the vehicle. The vehicle was taken to the dealership and he was advised that the transmission cooling lines needed to be replaced. There were no prior warnings. The current and failure mileages were 44000.
Transmission cooling pipes have been replace two times in last than 20 months because of fluid leaking.