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[Mutha Jugs n Speed]

Having a bit of a stock take this morning, and was looking through the crank sensors, and all OE, no knock offs. But checking the part numbers,  they were all 90492006, but upon checking the plugs, there was a mix of square and oval plugs and all three pin. So could the square ones be used on my 3.2's? 

[TheBoy]

Are the plastic at sensor end, or more like a metal fitting (I'm going from memory).  If the latter, they are for early 2.5s.

Later 2.5/3.0/2.6/3.2 all took same sensor.  Sadly, GM's EPC always have the incorrect one.

[Mutha Jugs n Speed]

I don't know whether they are going to fit the car, as the person who is 'stuck' has zero knowledge as to what the car requires and who's going to fit it, so  I'm sending both FOC as a favour, and at this point he's on his own as far as fitment etc.

[Enceladus]

There are three different crank sensors for the V6's. All three have different resistances.

90492006 is 550Ω. It has a square sided connector and most V6 cars have an oval sided loom connector. So it will fit in the block just fine but you can't connect it. And no, you can't just cut and splice splice the loom off your existing sensor because the resistance in the sensor head is incorrect. My guess is that these are early Calibra sensors.

90492061 is (circa) 720Ω is the early iteration of the oval connector sensor. Supposedly used on some early X25XE. Information on EPC is incorrect.

A 2.6/3.2 is much more likely to use 90540743 aka Bosch 0-261-210-131. The sensor head might also be stamped with a factory production number 90494182.  Cadillac and Saab use the factory production part number, it's still the same Bosch 0-261-210-131. This sensor has an oval sided connector and a resistance of 900Ω.

[Mutha Jugs n Speed]

So it looks like these won't fit the facelift 2.5, which is the car in question.