No engine will knock with too much oil. -Sounds like the bearings somewhere have failed due to low oil or long period between oil changes. Most likely upper con-rod bearings, but if you let a mechanic hear it, he will identify the sound.
knock sensor
Changing the engine oil and filter you would install 4 1/2 US Qts.
9 oz
The function of the knock sensor ob a sensor on a 1991 4.3 s10 is to provide the computer the position of the crank shaft to give it the right information to get correct timing. That would be the crank position sensor. The knock sensor monitors the engine for spark knock (ping) so the ECM (Engine Control Module) can retard the timing to eliminate it.
4.0 quarts
8oz.
4 .5 quarts
your 2.5 should hold 3.5 qts oil with filter
A 1996 Chevrolet S10 with a 4.3 liter vortec holds approximately 4.5 quarts of oil. The recommended oil type of 5 W 30.
knock sensor
Need to know what engine it has.
located in the block between the oil pan and cylinder head or the head itself middle way of the engine depending on the engine that ypu have