[justinwillett]

I put a 3400 from an 02 grand am into my 89 cavalier. What knock sensor should I be using? I'm pretty sure I used the 2.8 cause i just transferred it over.

 

[Six_Shooter]

If you kept the 2.8 ECM, use the 2.8 or 3.1 Knock Sensor. the 3400 KS is not compatible with the older ECM.