Circuit/System Verification

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Verify that DTCs P003A, P0047, P0048, P0087, P0101, P0201-P0208, P02A1, P02A5, P02A9, P02AD, P02B1, P02B5, P02B9, P02E0, P02E7-P02E9, P029D, P0234, P0299, P0300-P0308, P0401, P0402, P046C, P0545, P0546, P0698, P0699, P2032, P2033, P2269, P2453, or P2563 are not set.
- If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
Engine running at a warm stabilized idle, observe the scan tool Particulate Filt. Pressure Variance parameter. The value should be between 0-3 kPa.
Verify the following scan tool parameters:
- Engine Run Time Since Last DPF Regeneration parameter-The value should be less than 22 hours.
- Fuel Used Since Last DPF Regeneration parameter-The value should be less than 272 liters (71 gallons).
- Distance Since Last DPF Regeneration parameter-The value should be less than 1,030 kilometers (640 miles) at sea level, or less than 772 kilometers (480 miles) when equal to or above 5,000 feet altitude.
- If any of the parameters are greater than the specified range, perform a DPF Service Regeneration. Refer to Exhaust Particulate Filter Cleaning (LMM DPF Regeneration Enable) or Exhaust Particulate Filter Cleaning (LMM DPF Service Regeneration) .
Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.