item(s) totaling $
See if this part fits a specific vehicle.
|This product doesnt fit any of your saved vehicles||Check Fit for another vehicle|
Do you have questions about this product?(earn points for answers!)
Ask a question, get answers from real customers and in-house experts. Or contact Customer Care by email or call 1-877-238-2623.
Q:Where is the knock sensor on a 2005 Trailblazer 4.2L located and what is the best way to change it?
A:With reference to your inquiry on the BWD Ignition Knock (Detonation) Sensor - Part No. S8756, there are two knock sensors in your 2005 Chevrolet TrailBlazer 4.2L, the first one near the AC compressor on the left side of the engine block and the second one is located below the starter on the left rear of the engine block. To change the knock sensors on your vehicle, kindly follow the instructions to replace it: Disconnect your negative battery terminal first. Use a 1/2 inch socket to loosen the bolt on the Knock Sensor. Unclip the plastic retainer. Plug the new one in and bolt it back to the side of the engine block. By the way, the front Knock Sensor is right behind the air conditioning compressor. The rear Knock Sensor is located below the starter. Hooked the negative battery terminal back up and started the motor. For any further assistance please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto Parts store and one of our Parts Pros will gladly assist you with any questions or concerns you may have.
Q:There are two knock sensors on this engine; is it the front or back one?
A:This BWD Sensor - Knock (Detonation) - part# S8756 is vehicle specific. In order to check the exact fit, please provide the year, make, model and engine size of the vehicle. For any further assistance, you may also visit your nearest Advance Auto store or call us directly at 1-877-ADVANCE (238-2623) and one of our representatives there would be more than happy to assist you.
Q:Where exactly is this part located on my vehicle?
A:The knock sensor is going to be located on the engine block.