Service Bulletins
Service Bulletins give additional technical service information needed to knowledgeably service General Motors cars and trucks.
Each bulletin contains instructions to assist in the diagnosis and service of the vehicle.
See also:
Automatic Transmission Fluid
How to Check Automatic Transmission Fluid
It is not necessary to check the transmission fluid level.
A transmission fluid leak is the only reason for fluid loss. If a leak
occurs, take the vehi ...
Meet the Wedge
The CTS sedan's exterior is angular, but the new CTS coupe takes the design
theme to a new level. There are creases everywhere, and while most meet and
intersect to create a unique-looking coupe t ...
Making Turns
Notice: Making very sharp turns while trailering could cause the trailer
to come in contact with the vehicle. The vehicle could be damaged. Avoid making
very sharp turns while trailering.
When tu ...