Jump to content

Knock sensors?

05lq4

Recommended Posts

05lq4 Enthusiast

05lq4

Posted
Posted

Question: How often to knock sensors go bad? Do they or is it just the harness?

Im coming up on 160,000miles on my 05 lq4 and I'm getting ready to do gaskets on my heads and intake. I see suggestions to do the knock sensor wire harness while i got it apart. Which im fine with. But im always about budget. I wont use anything but OEM and the sensors are spendy. If thats all i was doing i could see spending the $$. But things are starting to add up quick.

Any advice is appreciated. Thanx in advance! 

 

txab Senior Enthusiast

txab

Posted
Posted

I think it would be prudent to change the KS, since they will be completely accessible. The general problem with these was the wells that they sit in would fill with water and ruin the KS

davester Senior Enthusiast

davester

Posted
Posted

Yeah, they can get water damaged (seems to be worse for some people, particularly those that wash their engine regularly).

 

It's a tradeoff, as you can't see if if looks like the wiring harness should be replaced without taking everything apart, and then you have to pay more to get the part quickly, vs buying it in advance with other parts for less money.

 

And it is much more expensive to replace later, as you've got to (well, I would) replace the intake manifold gaskets again to do the wiring harness separately.

kstruckcountry Senior Enthusiast

kstruckcountry

Posted
Posted

Check online for good prices on the ACDelco sensors and harness. I use RockAuto. If you go ahead and do them now you won't regret it. I did mine 100k miles ago, and they've been good since. I did coat the rubber sensor caps with high temp silicone and built a v-shaped "dam" in front of each sensor.

I originally used (overpriced) parts from O'Reilly's due to getting the code a day before leaving for a road trip. That was a mistake, it threw the code again while I was on the trip and I got to pull the intake again to replace them with ACDelco that I ended up paying less for online once I got back. Lesson learned. No refund from O'Reilly's for the faulty sensors either, of course.

Sent from my SM-G960U using Tapatalk

tigers2007 Enthusiast

tigers2007

Posted
Posted

There is an eBay seller that sells both knock sensors and harness for cheap. One word of caution though, eBay and Amazon are breeding grounds for counterfeit parts that look exactly alike. I stick with RockAuto or my local AutoValue store.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • Chuck FB
      2 speed transfer case optional now?

      By Chuck FB · Posted

      Yes, and also pulling heavy trailers or a large camper up steep grades as well as descending grades such as the more rustic off road camping locations and using engine braking with that low gearing as well as soft ground can just suck the power . I realize pickups these days tend to have an over all lower first gear ratio compared to automatic transmission pickups from years back so that has helped a lot in its ability in high range but there comes a point if in four wheel drive the torque runs out at the wheels, certainly with a gas engine. They don't put two speed transfer cases on pickups for a cool factor, they have a function if one needs that massive torque to the wheels that high range can't deliver. 
    • Grumpy Bear
      Grumpy Bears 2015 Silverado 2WD

      By Grumpy Bear · Posted

      Notes 7/18/2026   3,400 miles on this batch of Mobil 1 Euro 5W40 since the GDI pump replacement. Alcohol runs very clean when ring seal is tight and the sump isn't getting hosed with fuel. Checked oil level at fill up today as is my practice and grabbed a white Kleenex to look at the color. What color?  I was going to change it but.....  
    • Another JR
      2 speed transfer case optional now?

      By Another JR · Posted

      4 low is really nice on steep boat ramps. 
    • Chuck FB
      Gas Prices

      By Chuck FB · Posted

      Interesting, I suspect I would have fueled up in Lee Vining as the day prior I would have filled up either in Laughlin or near there and maybe again before I entered Death Valley and once out the other side late that evening as I kept on driving into the night up near Lee Vining. Next morning I most likely fueled up in LV before heading over Tioga Pass into ( as I refer to it as "Yose .... Mite" 😁 ). And again that was 19 years ago but the price then must not have jumped out at me like the 5 bill a gallon theme of nutty cult hippy country Big Sir or head so far up their rear Aspen. I'd be curious to know where the highest prices are in the lower 48, I probably would not be far off to guess somewhere in Cali forn ie. Coldfoot and Prudhoe bay may have those prices beat but that is a whole other world up there and when prices are more normal elsewhere that is about what they can be up there I believe in no mans land. Anyway interesting that the 395 corridor is hosing people and the thing is, its tourist season and its not like there are a lot of competition options when driving up that highway from what I could see. Yup, big ole Boaterhomes and various other RV's ahead and behind me at the Yosemite entrance gate and they have to get their fuel somewhere.  
    • Atlas
      Gas Prices

      By Atlas · Posted

      Those can be high, as well as the big California cities. The ones that will pop your eyes out are the 395 corridor on the Eastern side of the Sierra Nevadas. Lee Vining, $7.19 for regular and $8.89 for diesel is what the Google said right now.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...