Review on 🔥 213-3521 ACDelco GM Original Equipment Ignition Knock (Detonation) Sensor by Robert Tirona

These knock sensors were perfect for my 2001 5.3L Chevy Silverado. They were sent loose packed in an Amazon box with some airbags but arrived undamaged. This is the issue that was discussed but the parts arrived intact. It should be noted that although the product is an OEM part, it is assembled and manufactured in Mexico. However, when installing, it didn't matter because the sensor was working properly. The same sensors cost twice as much at your local auto parts store. Revain had the best price: it was a little higher than the price on other sites, but with a two-day delivery time on Prime. The knock sensor worked flawlessly the first time it was put into service, for a week without any problems. No more CEL :) Some things to watch out for when doing knock sensor work on a GM: Make sure you have a free weekend for this work, it takes more than 6-8 hours. As indicated below, now is the time to replace the additional parts as the distributor will be shut down. You can also carry out additional maintenance work, e.g. B. cleaning the IAC, MAF and throttle body. Parts you will need: 2 knock sensors (usually only the rear end is damaged, but as this is a lot of work you can swap them out) 1 knock sensor harness (the old one will be useless. The cover will not be airtight and the connectors will be fragile and likely to break) 1 intake manifold gasket (this goes without saying. all together) 1 throttle body to intake manifold gasket (you will likely remove the throttle body for easier removal and cleaning) 1 RTV pipe (preferably high temp. This is used to mount a to create a dam and prevent water from entering the knock sensor) and corrosion) Other Optional: 1 bottle of throttle body cleaner (while the entire manifold is off, you can spend this time cleaning the throttle body thoroughly. 1 bottle of MAF cleaner ( for cleaning the mass flow sensor air and idle control valve). ) Some We Workshop Cloths: (She will clean many parts covered in grease/dirt/grime) Vac Shop: (No matter how careful you are, there is a chance leaves or dirt could get into the valve/knock sensor cavities if you remove the manifold. A shop vacuum will pick up all of this debris quickly.) Other parts to consider replacing while you have your manifold removed: Rocker cover gaskets with gaskets (this is the ideal time to replace rocker cover gaskets if you notice small oil leaks) Heater hose quick disconnects: (These fittings are also notorious for being stowed near the firewall on many GM trucks. If you've never replaced them, now is a good time to replace them as you have easy access to them.) Note: I am not including part numbers as they vary by vehicle.