Hey ya'll, i just bough ta 1990 S10 Blazer. It has the 4.3 V6 in it. It keeps throwing codes for the oxygen sensor circuit low voltage and the crankshaft position sensor. When i try to go to Oreillys to buy the CKP sensor it does not come up in the system. My question, Is the CKP sensor called something different like the Camshaft sensor or something? and also where is it located on the engine?