01 sierra knocking

Here ya go.....
https://www.fixya.com/cars/t25588723-change_knock_sensor_1994_gmc_sierra_1500

• Chevrolet C/K( k= 4wd) pickups.
• Chevrolet Silverado?
• Chevrolet Suburban(no)

USA car or not in N.America at all??????????
which one is it, Sierra is a sub model class not a truck actual.
I will guess C1500????? pickup truck? 2wd./
scan the PCM yet, using any OBD2 scan tool for DTC errors?


it is not bad, 99% are not bad so no need to find it.
why not post a problem and not hunts.
the service manual on the car and google searches ends the hunt.



the knock sensor allows the PCM to tune spark timing to use poor grade fuel. and not allow knock and ping. it does that endlessly.
but if say you heard the engine ping, that is a dead EGR

PING (knock or detonation) is caused by poor fuel and crazy high combustion temps.
The EGR system cures it. (and must be cleaned or fails)
some trucks run spec cams that stop PING>
and some use those and a knock sensor..
it is a microphone ,sensor. and if engine bearings pound load

the KS1 sensor lies., to you. (and the PCM)
example rod knock or piston slap noises.


what truck is it,from USA 1998 list
1998 (sierra is a sub class not an actual truck) see?
Toggle C1500 PICKUP
Toggle C1500 SUBURBAN
Toggle C2500 PICKUP
Toggle C2500 SUBURBAN
Toggle C3500 PICKUP
Toggle FORWARD
Toggle JIMMY
Toggle K1500 PICKUP
Toggle K1500 SUBURBAN
Toggle K2500 PICKUP
Toggle K2500 SUBURBAN
Toggle K3500
Toggle K3500 PICKUP
Toggle P3500
Toggle SAFARI
Toggle SAVANA 1500
Toggle SAVANA 2500
Toggle SAVANA 3500
Toggle SONOMA
Toggle T SERIES TRUCK
Toggle TOPKICK
Toggle YUKON
the knock sensor
looks like OIL sender, or desk knob round.
newer 4.3L has 1 KS1, and KS2 sensors one per bank.
1998 , it is one, sensor, rear left of distributor.
left means (USA drivers left side) perspectives.

first google hit found it.




dead egr , cleaned or replaced seen here


https://www.rockauto.com/en/catalog/gmc,1998,c1500+pickup,4.3l+v6,1304659,exhaust+&+emission,egr+valve,4968

No, there not connected to each other. Unplug the switch and plug it back in. Bad connection.

The transmission has been electronically controlled for several years.
The miss could cause the knock sensor to set a code, but the sensor will not cause the miss. The knock sensor signals the computer and the computer tries to cut back on ignition timing to stop the knock. The sensor can set a code if it is a spark knock or something mechanical.

under the intake plentium right in the middle of the valley between the heads. bad for wires getting corroded and rusted. it holds water in the knock sensor holes, you can buy the harness

To troubleshoot the issue,go through the help link mentioned below:---
CARS: Working of
tire pressure monitoring systemhttp://technoanswers.blogspot.in/2012/10/cars-working-of-tire-pressure.html-------------
GMC ENVOY spare tire system stopped working?http://repairhelpcenter.blogspot.com/2012/01/gmc-envoy-spare-tire-system-stopped.html

TIRE PRESSURE LIGHT COMING ON?
http://whoisbyme.blogspot.in/2012/07/tire-pressure-light-coming-on.html

What is Best Tire For the Vehicle?http://technoanswers.blogspot.in/2012/04/what-is-best-tire-for-vehicle.html------------
1998 Toyota
Camry: Tires Make Knock Rattling Noise Over Bumps?http://whatisbyme.blogspot.in/2012/05/1998-toyota-camry-tires-make-knock.html

These will help. Thanks.

Damaged CV joint, cost about $250 to replace. Common defect on GM trucks even without miss treatment. How serious... the front tire can fall off at any speed at any time.

I doubt it....It could be a totally worn out engine.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/sean_54c3a3dc48a7773c

Pull distributor its on left rear engine behind left cylinder head in block near top

Shold be on passenger side or behind distributer