Circuit/System Testing
WARNING: This page is about a different car, the 2007 GMC Sierra, 2007 GMC Cab & Chassis Sierra, 2007 Chevrolet Silverado, and 2007 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
Perform the Repair Verification after completing the Circuit/System Testing.
Verify the integrity of the entire exhaust system by visually inspecting for the following conditions:
- Damaged exhaust system components
- Loose or improperly installed exhaust system components
- Leaks, or improperly routed pressure lines-The smaller tube connects to the front of the DPF. The lines should have a continuous downward gradient, without sharp bends, or kinks from the differential pressure sensor to the exhaust particulate filter assembly.