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GmcSierra15005.3
2025-08-25 12:33:47
I had to rework my heads, while I was at it these knock sensors had been an issue for a while. Its a nasty mess down in the knock sensor holes, apparently moisture is an issue. I cleaned the area and installed these knock sensors, the hard part was deciding based on the reviews which sensors to go with. These are OEM, good quality, and have not given any trouble. It helps to thoroughly clean the ports, install new seals, teflon tape the threads, assure the harness and connections are properly routed and well connected. I have found no issue with this product and am well satisfied.
Alex Peterson
2025-08-20 21:02:26
Save your time and money, just shell out for the ACdelco to start with. I learned the hard way. I had to do the job 3 times because I was trying to save a few bucks. Ended up spending more money and spending way more time. DON'T BE LIKE ME!!!!
jgardener
2025-07-28 18:16:47
I had never heard of a knock sensor before getting the error code from my local AutoZone. I found a couple videos and tutorials online that show you how to change them and it seemed easy enough. The first time I did it I over torqued the knock sensors because I didn't read the torque wrench instructions (I know they were over torqued because I accidentally sheared one of the intake manifold bolts with the same torque wrench). After driving around the knock sensor code came back. Not knowing what the problem was, I went to AutoZone and bought another set of knock sensors, which turned out to be the same as these but cost double the price. I bought a replacement manifold bolt on ebay and proceeded to remove the knock sensors. I checked the Ohm reading on them and they check out at 100k Ohms each as specified, they seemed to not be damaged from my over torquing so I tried reinstalling them at the proper torque rating (15 ft-lbs) and the check engine light hasn't come back. So I can take back the ones I bought from AutoZone since these ones worked once I installed them properly. I recommend doing your research and taking your time, there are lots of little things like clips and bolts that can break or get lost.
Jeff W
2025-05-08 18:30:25
Sometimes it's worth spending the extra cash on AC Delco parts. Considering how huge of a pain in the a$$ it is to replace these on an LS engine, it's money well spent.
Jimmie Taylor
2025-04-19 18:32:58
These sensors did not work in my 04 avalanche 5.3.I bought a pair to replace a rusted out one and went to torque to the 15ft lbs and the top of both sensors spun on me. I tried them anyway and a few miles down the road while watching DTC's, immediately got codes for both sensors. Did a return and replace, got the new set in, same thing. The top spun before it could even be torqued and yet again, a few miles and the codes set again.Bought another pair of ACDelco's from the AZ, this time these torqued fine without the top spinning. Put everything back together thinking I was golden, nope... a few miles down the road again and the codes set.I then bought the cheapest sensors I can get cause at this point I have nothing to lose other then time, however, these gave the same result as the first two sets.Went to the AZ and got their house brand ones and lone behold, these actually work! I've gone 500miles and no DTC and the diagnostic tests actually passed this time.For grins and giggles, I tested the sensors with a oscilloscope multi-meter to look at the AC sine wave and test the resistance. The 3 sets of ACDelco's produced no AC sinewave but resistance was good. The cheap ones produced more AC than the ACDelco's but resistance was around 50k. I got a third sensor, the house brand, from the AZ and I got spikes of AC of around 5V which was a thousand times better than the other sensors and resistance was smack dab 100k.All it cost me was trying 5 sets of sensors and a lot of headache taking the plenum off and on but it comes to show that don't trust just the resistance of these sensors...thats only showing half the picture. Get yourself a cheap oscilloscope multi-meter and test them before you put them in to save yourself the headache. Also I am either bad at the automotive lottery or theres a bad batch of ACDelco sensors out but in the end I am very quick at swapping these out now.
Josh
2025-03-04 12:37:36
2001 Chevy Tahoe. Previous owner replaced with junk sensors. Put these ac Delco sensors in and ZERO issues. Stick with these ones guys!!!
Anibal
2025-03-03 15:11:45
Todo correcto parece ser una pieza original, lo que no me gustó fue el embalaje lo mandaron en una bolsa plástica simple de Amazon, me gustarÃa que la hubiera recibido en una bolsa con burbujas o por lo menos envuelta en algo que protegiera la pieza, pero llegó en buen estado, espero que cuando la coloque haga buen su funcion
Jose R.
2025-01-29 19:19:04
Los instalé y siguió marcando el código de falla no me funcionaron y tuve que comprar otros de otra marca para que ya no marcar el código
Greg S
2025-01-26 13:37:14
Worked perfect. Replaced both sensors on a 2006 Silverado 6L with a new harness as well.
martin engel
2024-12-14 21:58:45
oem replacement, water got into the rear one and wire assembly advise to change both sensors 2 are better than one keep the good one you never know. seal the caps and wires with high heat silicone to prevent water entering and finally intake gaskets will have to be changed felpro are very good replacements. last but not least chuck the front and rear foam in the garbage, they hold water and humidity. without the foams it willadd better air circulation. problem solved !
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