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Where is the knock sensor on a 1991 Grand Prix?

The knock sensor on a 1991 Pontiac Grand Prix is located on the engine block, usually on the passenger side (right side), near the front of the engine. However, the exact location can vary slightly depending on the engine (e.g., 3.1L V6, 3.8L V6).

To be certain, you should:

* Consult a repair manual specific to your 1991 Grand Prix's engine. This is the most reliable way to find the exact location. A Haynes or Chilton manual would be helpful.

* Look at diagrams online: Search for "[Your Grand Prix's engine] knock sensor location" on sites like Google Images or a parts website like AutoZone or RockAuto. Their diagrams can help you visually pinpoint it.

Remember to be cautious when working around the engine; it may still be hot. Always disconnect the negative battery terminal before starting any work.

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