03 Silverado Knock Sensors

[owenbyc]

hi i have a 03 silverado 4.8 4x4 with the p0327 and p0332. which is low output for both front and rear sensors. question is can both go bad at once or what. i checked for resistance at the connector and i got something in the 90's on both terminals. so i have no clue what to do. any help would be greatly appreciated thank you

[JF1957]

hi i have a 03 silverado 4.8 4x4 with the p0327 and p0332. which is low output for both front and rear sensors. question is can both go bad at once or what. i checked for resistance at the connector and i got something in the 90's on both terminals. so i have no clue what to do. any help would be greatly appreciated thank you

Try in the "Ask a GM technician" section

Good luck

[8.1HD/ALLISON]

Knock sensors are kinda common. Most of the time they get a little water down in the "holes" the sensors are in and corrode, causeing resistance problems. I would replaced both knock sensors and there is a short wiring harness from the sensors to the top of the intake manifold. I usually replace those too.

[USMC2010]

I had a p0332 code about 2 years ago, wound up replacing the downstream O2 sensor on the passenger side exhaust (the one behind the cat farthest to the passenger side) and it cleared it. I was about to tear the top of my intake apart and had a long conversation with a GM tech and he recommended that first, said it is a common code for O2 sensor.