Comprehensive Diagnosis of a 2007 Chevrolet Suburban: Ignition Switch and Transmission Issues

TLDRIn this video, we diagnose a 2007 Chevrolet Suburban with an ignition switch problem and a noisy and sluggish transmission. We find a missing relay, low fluid levels, and trouble codes indicating issues with the fuel pump and oil pressure. The engine also continues to run with the key removed. We clear the trouble codes and make a plan for further diagnosis.

Key insights

🔑The ignition switch is faulty, causing issues with powering down the vehicle and triggering trouble codes.

⚙️The transmission is noisy and sluggish, indicating possible damage or a failing torque converter.

⛽A missing fuel pump relay and low fluid levels contribute to the transmission issues.

🔍Trouble codes related to oil pressure and the transmission control module suggest additional electrical problems.

🔧Further diagnosis is needed to determine the exact cause of the ignition switch and transmission issues and address any additional electrical problems.

Q&A

Why does the engine continue to run with the key removed?

—The faulty ignition switch fails to cut off power to the engine, causing it to continue running.

What might have caused the noisy and sluggish transmission?

—Possible causes include damage to the transmission or a failing torque converter due to low fluid levels and missing relay.

Why is the fuel pump relay missing?

—It is suspected that someone removed the relay and failed to replace it, causing fuel pump issues.

Are there any other electrical problems indicated by the trouble codes?

—Yes, trouble codes related to oil pressure and the transmission control module suggest additional electrical issues.

What is the next step in diagnosing and fixing these issues?

—Further diagnosis is needed to determine the exact cause of the ignition switch and transmission issues, as well as any additional electrical problems.

Timestamped Summary

00:00Introduction and welcome to the video.

01:32Testing the ignition switch and experiencing difficulties starting the vehicle.

03:32Troubleshooting the transmission issues and experiencing clunky shifting.

05:50Checking the fluid levels and observing low and dirty transmission fluid.

08:34Discovering a missing fuel pump relay and potential electrical issues.

11:15Testing the ignition switch further and experiencing continued engine running with the key removed.

12:31Clearing trouble codes and planning for further diagnosis.

13:45Conclusion and next steps for fixing the ignition switch and transmission issues.

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