what is this module for?

[chessie 6.5]

Done some searching on Alldata, but couldn't find answer. When you remove glove box liner(1994 K2500 6.5f), at 6 oclock, there is a white module, approx 1/2 inch thick, 4x4 inches with room for two plugs. One plug (about 8 to 10 pins) and an empty 4 pin socket. Any ideas? :thinking:What would the empty socket be for? Thanks

 

[robzombie4551]

Transmission module/ empty one not used

 

[Crankme69]

Lookie here

http://www.tbichips.com/drac/

 

[great white]

Sounds like the DRAC.

Although that is usually behind the dash at what you would call 9 o'clock by your description...

 

[robzombie4551]

It mounts under the main computer in my truck. 6 o'clock pos. Yes it's the drac/vssb

 

[buddy]

in my 94 its just sitting behind glove box not with the PCM

and both connectors are used one has only one wire on it. i dont have my laptop to tell you what it is but if your speedo is working but having shift issues then its the line that goes to PCM to tell it how fast you are going

 

[chessie 6.5]

funny thing is.... last week,I was looking at that article about modifying the speed sensor for larger tires. Even ordered the dip switches for it. The unit in the pics didn't register. Now, at least, I won't have to tear dash apart looking for it. Thanks guys for the quick replies.:thumbsup:

 

[great white]

funny thing is.... last week,I was looking at that article about modifying the speed sensor for larger tires. Even ordered the dip switches for it. The unit in the pics didn't register. Now, at least, I won't have to tear dash apart looking for it. Thanks guys for the quick replies.:thumbsup:

Lawl....that's on my "to do" list too!

I've done it with all my gasser 88-98 trucks to correct the speedo...:thumbsup: