What is this sensor called?

[brettdn]

I am finally into the final stages of licensing my 4x4 GMC but I am running into a few issues. I replaced my actuator and transfer case switch and no lights come on and I know it's in 4WD (Floor shift type) I found this sensor on the front differential and I am assuming this is the switch to turn on the lights but when I look on RockAuto or etc I can't find this exact looking switch/sensor.

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It has a 4 pin plug only 3 pins are in the plug. This is off a 1988 K1500

 

[92BlkK1500]

it's the oxygen sensor better known as the o2 sensor.

 

[magimerlin]

92....you I got wanna look at the pic a bit better... although it looks like the same plug end as an o2 sensor that is definitely not what it is....

sent from what use to be a great nation...

 

[Eskimomann209]

Looks like an O2 sensor to me too

 

[Eskimomann209]

if not it's a temp sensor for something

 

[magimerlin]

Only place I seem to be able to find it.....here is a pic..

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sent from what use to be a great nation...

 

[magimerlin]

http://www.classicparts.com/mobile/...ator-Switch/productinfo/53-6351/#.VUl_Qcko7qA

sent from what use to be a great nation...

 

[ChrisAU]

Pretty sure that is your actuator, the old style slow mo one. They were upgraded and now all new ones come with a splice kit to replace the old connector IIRC.

 

[ChrisAU]

http://www.classicparts.com/mobile/...ator-Switch/productinfo/53-6351/#.VUl_Qcko7qA

sent from what use to be a great nation...

Nicely done!

 

[Eskimomann209]

Good job gents