Excessive Smoke (White)
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Check the coolant level in the reservoir. White coolant smoke may be mistaken for blue/gray smoke. If the coolant level is low, refer to Loss of Coolant .
- If excessive smoke is present, inspect for a stuck open fuel injector by performing the following procedure:
- Disconnect the CKP sensor.
- Remove the glow plugs. Refer to Glow Plug Replacement - Bank 1 and Glow Plug Replacement - Bank 2 .
- Crank the engine while observing the glow plug holes for fuel spray.
- Replace the fuel injectors for the cylinders that spray fuel.
- Inspect for contaminated oil or high oil level.
IMPORTANT: Do not stand in front of the glow plug holes while cranking the engine. - If the ECM glow plug control module (GPCM) or a fuel injector has recently been replaced, it may be necessary to confirm the fuel injector flow rate values. Refer to Fuel Injector Flow Rate Programming .
- Inspect the fuel injectors. Refer to Fuel Injector Balance Test with Tech 2 .
Excessive Smoke (Blue, Gray, or White)
Blue, gray, or white smoke during regeneration may indicate a fuel with high sulfur content.