* Automatic Transmission: The speed sensor is typically located on the top of the transmission case. You'll likely find it near where the transmission connects to the output shaft. It's usually a small sensor with a single wire connector.
* Manual Transmission: On manual transmission Cavaliers, the speed sensor is usually part of the vehicle speed sensor (VSS) assembly located on the top of the transmission case, near the speedometer cable connection.
To be certain:
1. Consult your owner's manual: This is the most reliable source of information. It will show a diagram of the sensor's location.
2. Use a repair manual (like a Haynes or Chilton manual): These provide detailed diagrams and instructions.
3. Search online for a diagram specific to your 1999 Chevy Cavalier: Search using phrases like "1999 Chevy Cavalier speed sensor location [automatic/manual transmission]" Images and forums can be helpful.
Important Note: Before attempting any repairs, disconnect the negative battery terminal to prevent electrical shocks or damage.
