This information applies to 2006-07 Silverado and Sierra Classic 2500/3500 Series and 2007-09 Silverado and Sierra 2500/3500 Series equipped with 6.6L Diesel Engine (VINs D, 2, 6 - RPOs LBZ, LLY, LMM).
According to bulletin 08-07-30-049A, some customers may comment on a transmission fluid leak. This concern is more prevalent in extreme cold climates. Further inspection may show that the leak is coming from one of the transmission cooler lines at the hose to steel line crimp.
If the under-vehicle inspection reveals transmission fluid leaking from one of the cooler lines, replace the affected cooler line. New transmission cooler lines have been released to address this concern. These new lines have been manufactured with an updated crimp process to better withstand the cold temperatures. Refer to SI for the replacement procedures.
TIP: New transmission cooler lines were implemented in production September 16, 2008 on 2009 model year vehicles.
- Thanks to Henry Steaban
According to bulletin 08-07-30-049A, some customers may comment on a transmission fluid leak. This concern is more prevalent in extreme cold climates. Further inspection may show that the leak is coming from one of the transmission cooler lines at the hose to steel line crimp.
If the under-vehicle inspection reveals transmission fluid leaking from one of the cooler lines, replace the affected cooler line. New transmission cooler lines have been released to address this concern. These new lines have been manufactured with an updated crimp process to better withstand the cold temperatures. Refer to SI for the replacement procedures.
TIP: New transmission cooler lines were implemented in production September 16, 2008 on 2009 model year vehicles.
- Thanks to Henry Steaban
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