Transmission Component Name

96 GMC Jimmy, SLT, 4.3 Vortec.

Hi guys, I needed help finding out the name of that black box-like component/sensor (or whatevr it is called) that is attached on the left side of the tranny, drivers side. You can see it when you just look under the driver's side. Its also got a connection running to it.

Thanks.

I was able to get under the truck and take a picture of it along with a part# 12450016. Once i tried to Google it it came out being the NEUTRAL SAFETY SWITCH, AC Delco Part# D2285A.

Does anyone know what this does?

Thanks

Operates reverse lites, tells pcm what gear you have selected, prevents starting in gear.

Thanks maxwedge!

I was also able to look further into it (for anyone else that might ask) and found the following:

Neutral Safety Switch

This switch opens (denies current to) the starter circuit when the transmission is in any gear but Neutral or Park on automatic transmissions. This switch is normally connected to the transmission linkage or directly on the transmission. Most cars utilize this same switch to apply current to the back up lights when the transmission is put in reverse. Standard transmission cars will connect this switch to the clutch pedal so that the starter will not engage unless the clutch pedal is depressed. If you find that you have to move the shifter away from park or neutral to get the car to start, it usually means that this switch needs adjustment. If your car has an automatic parking brake release, the neutral safety switch will control that function also.


http://www.familycar.com/Classroom/starting.htm