* The spark plugs on a 1996 Oldsmobile Bravada with the 4.3L V6 engine are located on the top of the engine, below the valve covers.
* To access the spark plugs, you will need to remove the upper intake plenum.
* Once the intake plenum is removed, you will see the spark plug wires connected to the spark plugs.
* To remove a spark plug, disconnect the spark plug wire and use a spark plug wrench to turn the spark plug counterclockwise until it is loose.
* Be careful not to drop the spark plug into the cylinder.
* When installing new spark plugs, hand-tighten them first, then use the spark plug wrench to turn them an additional 1/4 turn.
* Reconnect the spark plug wire and repeat the process for the remaining spark plugs.
Here is a detailed step-by-step guide:
1. Disconnect the negative battery cable.
2. Remove the engine cover.
3. Disconnect the fuel injector and ignition coil electrical connectors.
4. Remove the upper intake manifold bolts and lift off the intake manifold.
5. Remove the spark plug wires from the spark plugs.
6. Use a spark plug wrench to remove the spark plugs.
7. Install the new spark plugs by hand-tightening them first, then use the spark plug wrench to turn them an additional 1/4 turn.
8. Reinstall the spark plug wires and connect the fuel injector and ignition coil electrical connectors.
9. Reinstall the upper intake manifold and the engine cover.
10. Reconnect the negative battery cable.
