My check engine light came on my 93 s10 blazer 4.3 L Vin W so i checked it with the paperclips and it came up engine code 43, i found out that is a bad knock sensor...Where is the knock sensor located

 

Another thread man... Please, PLEASE try to keep things together and in the proper section... As each of these problems you are having pertains to a specific generation of blazer, the appropriate place is in the 1st Gen Tech section. The Engine & Transmission section is more for problems with the hard parts of the engine & transmission (pistons, block, heads, clutch packs, etc) which are very similar across all generations.

*Moving to 1st Gen Tech*

There are two knock sensors on your motor. One is located on the driver's side cylinder head between cylinders 3 & 5. The other is located off the back of the passenger side cylinder head.

 

Thank you and sorry about that i couldnt find my other posts thats why i made new ones but ill be sure to keep it all together

 

I checked the sensor and it looked like the plastic part snapped off of the engine block...how would i go about putting that back on or putting a new one back on?

 

The knock sensor should have a metal base to it. That threads into the block. The plastic is just the electrical connection.

The LH knock sensor should look like the picture below and is under AC Delco # D8003.
[IMG]local://upfiles/667/2B6EFB72BEA34A4B86B30813ED174B4B.jpg[/IMG]
The RR knock sensor should look like the picture below and is under AC Delco # 21395
[IMG]local://upfiles/667/05B8AE6BA1614CE2A372BCF595823430.jpg[/IMG]

Also, just to warn you, I believe that both of them open up into the water jacket. I know that the one on the driver's side does.