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.
Diagnostic Procedures
2004 Oldsmobile Bravada RWDSECTION Diagnostic Procedures
WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
- Did you perform the Inspection/Maintenance (I/M) System Check? If yes, go to next step. If no, see INSPECTION/MAINTENANCE SYSTEM CHECK .
- Ensure the vehicle is within the CONDITIONS FOR RUNNING . Turn OFF all of the accessories (e.g., A/C, blower fan, etc.). Start the engine and allow the engine to idle. For this test to run, the vehicle must operate in the following conditions:
- Acceleration at part throttle to 55 MPH with this speed maintained for 5 minutes.
- Deceleration to zero MPH.
- Engine idling for 2 minutes while the following criteria is maintained:
- Service brake depressed.
- Automatic transmission in Drive.
- Manual transmission in Neutral with the clutch pedal depressed.
With scan tool, observe the I/M System Status display. Did the Catalyst System Status update to YES? If yes, go to step 5. If no, go to next step.
- With scan tool, observe the DTC Information. Does scan tool indicate any failed DTCs? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, go to next step.
- To determine which DTCs are required to run in order to complete this test, see INSPECTION/MAINTENANCE SYSTEM DTCS table. With scan tool, observe the Not Ran Since Code Cleared display. Determine which of the DTCs required for a YES status has not run. Enter the DTC number in the Specific DTC menu of scan tool. Operate the vehicle within the Conditions For Running DTC, located in appropriate DTC test. Repeat the procedure until scan tool indicates the diagnostic test has run. Repeat steps 4-6 for any additional required DTCs that have not run. With scan tool, observe the I/M System Status display. Did the Catalyst System Status update to YES? If yes, go to next step. If no, see DIAGNOSTIC AIDS .
- With scan tool, observe the Emission Related DTC portion of the I/M System Status display. Does scan tool indicate any Emission Related DTCs set? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, system is okay.
WARNING:
Road test a vehicle under safe conditions and while obeying all traffic laws. Do not attempt any maneuvers that could jeopardize vehicle control. Failure to adhere to these precautions could lead to serious personal injury and vehicle damage.
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.