knock sensor

ok guys back again with more questions, well specifically one question. Where is the knock sensor on my truck. I have a 2000 S10 ZR2 with the L35 V6. i have 2 chilton maintenance books and one had a description and the other had pictures to go along with it but the pictures were of the oil...

I have an 88 s15 with the 4.3 and was reading a code 43 which is knock sensor or electronic spark controller problem. Truck runs real sluggish and sometimes stalls occasionally. I tested for continuity on my knock sensor and had none so I replaced it, but I've also heard that I'm supposed to get...