Tools and materials needed:
-Replacement catalytic converter
-Wrenches
-Socket set
-Jack and jack stands
-Safety glasses
-Gloves
-Goggles
-Crescent wrench
-Spray lubricant
1. Park the vehicle on a level surface, turn off the engine and allow it to cool down.
2. Engage the parking brake and chock the wheels to prevent the vehicle from rolling.
3. Locate the catalytic converter. In the 1997 Tahoe, it is situated under the vehicle, between the engine and the muffler.
4. Raise the vehicle using a jack and place jack stands under the frame to support it securely. Make sure the vehicle is stable before proceeding.
5. Wear your safety glasses and gloves to protect yourself.
6. Locate the oxygen sensors on the catalytic converter. There will be two sensors, one upstream (before the converter) and one downstream (after the converter).
7. Disconnect the oxygen sensors by unplugging the electrical connectors and unscrewing the oxygen sensors from the exhaust pipes. Use a wrench to loosen the oxygen sensor bolts.
8. Locate the bolts or nuts holding the catalytic converter to the exhaust system. There may be bolts on the front and back of the catalytic converter.
9. Spray the bolts or nuts with a penetrating lubricant to loosen any rust or corrosion.
10. Use a wrench or socket set to loosen and remove the bolts or nuts holding the catalytic converter in place.
11. Carefully lower the old catalytic converter from the vehicle.
12. Place the new catalytic converter into place and secure it using the bolts or nuts you removed earlier. Tighten the bolts or nuts securely.
13. Reinstall the oxygen sensors and reconnect the electrical connectors.
14. Lower the vehicle and remove the jack stands.
15. Start the vehicle and let it run for a few minutes. Check for any leaks or unusual noises.
Make sure to dispose of the old catalytic converter properly. It contains precious metals and should be recycled.
