Ive noticed lately that on cold start I dont get the higher idle and more pronounced diesel rattle. I have a brown wire at the coolant sensor on the Pass. rear head with 12v. the other green wire to it goes to the IP and a high idle solenoid. That sensor must be bad, a jumper wire makes it work. My question is, anyone have a part number for it, and what temp is it set to open at?
Thanks Pete

aftermarket KEM line part no.147
gm 14071047 has been superseded to another no.
your gm dealer will know new no.

Thanks.