Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 838 (ENGINE EXHAUST SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESRESTRICTED EXHAUSTTEST METHOD
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
Test Method
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Test Method
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
- Remove the oxygen sensor.
- Connect the gage bar tool kit SA9127E 0-60 in H2O.
- With the engine at normal operation temperature, observe the exhaust back pressure at constant 4,000 RPM for 5 seconds.
- Back pressure must be less than 20.13 in H2O (5.0 kPa).
- Replace the damaged or defective parts.
- Remove the test equipment.
IMPORTANT:
If the exhaust pressure exceeds specification, inspect for dents/obstructions. It may be necessary to disconnect the muffler or the pipe before or behind the converter and repeat the test.
IMPORTANT:
Use non-silicon anti-seize compound on the threads. It may be necessary to use a scan tool to delete any codes set while performing the pressure test.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.