Excessive Smoke (Black)

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.

The DPF is damaged and must be replaced. Inspect the following possible causes that may have damaged the DPF.
Inspect for an air leak in the charge air cooler or the air ducts between the turbocharger and the intake manifold. Refer to Charge Air Cooler Diagnosis (Induction System Smoke Test) or Charge Air Cooler Diagnosis (Full System Air Leak Test) or Charge Air Cooler Diagnosis (Charge Air Cooler Air Leak Test) .
Inspect for a restriction in the turbocharger charge air cooler.
Inspect for a restriction in the intake manifold.
Inspect for excessive oil entering the combustion chamber. Refer to Oil Consumption Diagnosis .
Inspect for a stuck open EGR valve.

IMPORTANT: Do NOT drain the coolant at this time.

Remove the air inlet tube to the intake manifold. Refer to Exhaust Gas Recirculation Valve Cooler Replacement . Perform steps 1-15.
Visually inspect the EGR valve and verify the valve is in the closed position.
Ensure that the EGR valve does not bind when manually moving the valve.