Most common locations:
* 2WD Trucks (Automatic or Manual): Often found on the output shaft of the transmission. It's a small sensor, usually with a single wire connector, mounted near the transmission tail housing.
* 4WD Trucks (Automatic): Could be on the transfer case or still on the transmission output shaft. Checking both areas is recommended.
* 4WD Trucks (Manual): More likely to be located on the transmission output shaft, but the transfer case is also a possibility.
To find it definitively:
1. Consult your owner's manual: The best place to start. It should show a diagram of your truck's drivetrain and sensor locations.
2. Use a repair manual (like a Haynes or Chilton manual): These manuals usually have detailed diagrams and instructions specific to your truck's year, make, model, and drivetrain.
3. Check online forums: Search online forums specific to your year and model Chevy truck (e.g., "2004 Chevy Silverado speed sensor location"). Someone may have already posted pictures or descriptions.
4. Use a vehicle diagnostic tool (OBD-II scanner): While it won't show the exact location, a scanner can help you identify if the speed sensor is malfunctioning, allowing you to focus your search.
Important Note: Before attempting to locate or replace the speed sensor yourself, make sure the truck is turned off and the ignition is in the "off" position. Incorrect installation can damage the sensor or other parts of the drivetrain. If you're not comfortable working on your vehicle, take it to a qualified mechanic.
