What is a knock sensor on a truck?
Your knock sensor is an electrical device on your truck, car or Sport Utility vehicle that detects knocks in your engine caused by premature detonation of the air-fuel mixture as it enters the cylinder head.
When does a GM Sierra 1500 get a knock?
I have a 2000 Sierra 1500 with the 5.3L engine, and I am having the same symptoms. At about 9000 miles, it developed a knock (sounded like a lifter) when cold. The dealer did a GM-recommended “decarbon treatment” which did no good. The truck now has 15,000 miles and the knock is getting worse – even happens some when the engine is warm.
What does a GM 6.0 liter knock sound like?
At about 9000 miles, it developed a knock (sounded like a lifter) when cold. The dealer did a GM-recommended “decarbon treatment” which did no good. The truck now has 15,000 miles and the knock is getting worse – even happens some when the engine is warm.
What should I do if my knock sensor goes bad?
When knock sensors start to go bad, you may hear a pinging or loud knocking coming from your engine. If you ever need to bypass your knock sensors, the most direct way of doing so is to simply disconnect them.
Are there any knock sensor problems on GM trucks?
Knock Sensor Problems on GM Vehicles. Knock sensor problems are common on 1999-2007 Chevy Silverado, Express Van, Tahoe and Suburban trucks. Of course, this means that the GMC Sierra and Yukon of the same years have the same issues.
Why does my Vortec 6000 make a knocking noise?
If you get a check engine light and codes for engine knock on your 6.0L vortec, it could be actual engine knock. However, if you do not hear any knocking noises but do have a CEL, you likely have a bad knock sensor. On the 6.0 engine, the knock sensor has a pretty crappy sealant on it which can cause water to enter the sensor.
What are the codes for the knock sensor?
Eventually this turns on the check engine light and sets the codes P0332 and P0327. Note that often either one or the other code will set. Regardless if one or both codes are set, not only should the two original knock sensors be replaced, but you should also replace the harness.
Where are the knock and Ping sensors located?
It’s a piezoelectric automotive sensor that produces a small voltage signal when it hears internal engine noise that we often call knock and ping. This is why the location of the two sensors is a problem. In order to hear the engine noise reliably the sensors are buried under the intake manifold.