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.
2002 Chevrolet Express 3/4 Ton Van V8-6.5L DSL Turbo VIN FFACTORY OEM SERVICE PROCEDURE
I/M Complete System Set Procedure
DESCRIPTION
The purpose of the I/M Complete System Set Procedure is to satisfy the enable criteria necessary to execute all of the I/M readiness diagnostic tests, and complete the trips for those particular diagnostic tests. When all diagnostic tests are completed, the I/M System Status indicators are set to YES. Perform this test when more than one or all of the I/M System Status indicators are set to NO.
CONDITIONS FOR RUNNING
Cold start
^ The engine coolant temperature (ECT) is less than 56°C (133°F).
^ The intake air temperature (IAT) is more than 7°C (20°F).
^ The transmission fluid temperature is between 20-130°C (68-266°F).
DIAGNOSTIC AIDS
If a step is interrupted before completion, perform the remaining portion of the set procedure. Any portion of the set procedure that requires the engine at operating temperature may be repeated. This will allow most of the diagnostic tests to run and the remaining tests can be performed using the individual system set procedures.
TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
1. Make sure that you perform the I/M System Check before performing this test. Failure to do so may result in difficulty updating the status to YES.
2. This step initiates the Component Monitoring Tests.
3. The cruise portion of the step runs a portion of the Component Monitoring Tests and to prepare for the remaining tests.
4. The acceleration portion of the step completes the Component Monitoring Tests and the idle portion completes the Misfire Monitoring diagnostic tests.
5. Perform the individual system test for any of the systems that do not update to YES.
6. The I/M System Status only reports on whether or not a diagnostic test has run, not the outcome of the test. If any emission related DTC sets after the tests are complete, the DTC will require diagnosis.
The purpose of the I/M Complete System Set Procedure is to satisfy the enable criteria necessary to execute all of the I/M readiness diagnostic tests, and complete the trips for those particular diagnostic tests. When all diagnostic tests are completed, the I/M System Status indicators are set to YES. Perform this test when more than one or all of the I/M System Status indicators are set to NO.
CONDITIONS FOR RUNNING
Cold start
^ The engine coolant temperature (ECT) is less than 56°C (133°F).
^ The intake air temperature (IAT) is more than 7°C (20°F).
^ The transmission fluid temperature is between 20-130°C (68-266°F).
DIAGNOSTIC AIDS
If a step is interrupted before completion, perform the remaining portion of the set procedure. Any portion of the set procedure that requires the engine at operating temperature may be repeated. This will allow most of the diagnostic tests to run and the remaining tests can be performed using the individual system set procedures.
TEST DESCRIPTION
Steps 1-6:
The numbers below refer to the step numbers on the diagnostic table.
1. Make sure that you perform the I/M System Check before performing this test. Failure to do so may result in difficulty updating the status to YES.
2. This step initiates the Component Monitoring Tests.
3. The cruise portion of the step runs a portion of the Component Monitoring Tests and to prepare for the remaining tests.
4. The acceleration portion of the step completes the Component Monitoring Tests and the idle portion completes the Misfire Monitoring diagnostic tests.
5. Perform the individual system test for any of the systems that do not update to YES.
6. The I/M System Status only reports on whether or not a diagnostic test has run, not the outcome of the test. If any emission related DTC sets after the tests are complete, the DTC will require diagnosis.
Factory Service Tools
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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.
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