Diesel Exhaust Fluid (DEF) is used with diesel engines to reduce the amount of regulated emissions produced. The DEF system must be maintained for the vehicle to run properly. It is normal to hear the DEF system purge fluid back into the tank after the vehicle is shut off.
Locating Diesel Exhaust Fluid
DEF can be purchased at a Chevrolet dealer. It can also be purchased at authorized vehicle dealerships. Additionally, some diesel fueling stations or retailers may have DEF for purchase. For vehicles with an active OnStar subscription, OnStar can help to locate a DEF retailer. See Customer Assistance Offices for phone numbers to assist you in contacting a GM dealer. See Recommended Fluids and Lubricants.
As the DEF tank becomes low on fluid, warnings begin with approximately 1 600 km (1,000 mi) of remaining range. These warnings will increase in intensity as the tank becomes empty. Once the tank is empty, the vehicle speed will be limited. If there is an issue with the quality of the fluid or the exhaust fluid system, warnings will be displayed in the Driver Information Center (DIC). See Diesel Exhaust Fluid.
Valve Stem Oil Seal and Valve Spring Replacement - Left Side Valvetrain Valve Actuating Assembly
Special ToolsEN-39313 Spark Plug Port AdapterEN-46106 Flywheel Holding ToolEN-46110 On-Vehicle Valve Spring CompressorEN-46116 Valve Stem Seal Remover/InstallerFor equivalent regional tools, refer toSpecial Tools.Removal ProcedureNote:This procedure is not used in Brazil.Remove the rocker arms. Refe ...