Results 1 to 8 of 8

Thread: VSSB module pinout

  1. #1
    Fuel Injected!
    Join Date
    Aug 2012
    Age
    39
    Posts
    24

    VSSB module pinout

    I got a VSSB module out of a 95 truck for my 86 C10, which is running a TPI with a 1227730. The plan is to put an NV3500 transmission in the truck, which has a 40 pulse VSS.

    The issue is that there doesn't appear to be any pinout diagrams for the VSSB for retrofit applications. I've searched extensively and only come up with a hand written pinout (which was useless).

    Here is the diagram I have so far:

    VSSB Module Pinout 92-95
    Pin Color Function
    1
    2
    3
    4
    7 Lt Grn/Blk VSS pin “A”
    8 Blk/Wht Ground
    9 Pnk/Blk 12V+ Batt
    10 Wht
    11 Dk Blue
    12 Ppl/Wht VSS pin “B”
    13 Brn
    14 Dk grn/Wht
    15 Dk Grn

    Maybe someone in the know could help fill in those blanks?

  2. #2
    RIP EagleMark's Avatar
    Join Date
    Feb 2011
    Location
    North Idaho
    Age
    63
    Posts
    10,477
    Like this?
    Attached Images Attached Images

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  3. #3
    Fuel Injected!
    Join Date
    Aug 2012
    Age
    39
    Posts
    24
    Looks about right, however the colors don't match up to the diagram of my box. Does it matter, is the wiring of the DRAC and the VSSB the same?

  4. #4
    Fuel Injected!
    Join Date
    May 2011
    Location
    Pocono's PA.
    Age
    50
    Posts
    370
    2011-03-15_194728_buffer2.gif

    pinout.jpg

    Maybe one of these two could help, they are the two I have saved for the later model PCM's ('7427, etc...) ?

    TOM
    Last edited by Nasty-Z; 03-29-2013 at 09:27 PM.
    1994 3500 Dually , 502 (509) , 264HR , Edelbrock MPFI , PFI '7427
    1992 S-10 434 SBC/Tremec - '7427
    1986 Monte Carlo SS
    1984 S-10 , SAS, 496/700R4/205 , D44/14BFF -'7427
    1980 Z-28 496/700R4
    1979 Corvette 496/700R4
    1977 Olds 98 Regency 403/700R4

  5. #5
    Administrator
    Join Date
    May 2011
    Location
    Lakes Region, NH
    Age
    54
    Posts
    3,847
    The speed sensor adapter was called a DRAC by many before the term VSSB started being thrown around. The diagram above showing two distinct connectors is one I put together years ago using info from several different vehicles. So far I haven't received any info contradicting it. If you're only looking for a speed signal for ecm/pcm and speedometer that one will work.

  6. #6
    RIP EagleMark's Avatar
    Join Date
    Feb 2011
    Location
    North Idaho
    Age
    63
    Posts
    10,477
    Do the Drac and VSSB share same connector? I know they are different as DRAC has one set of jumpers and VSSB has 2 sets of jumpers.

    Strange how GM used DRAC in older square body TBI trucks, went to DRAC or? in Speedometer in newer body style 1988, then went back to VSSB in later TBI trucks.

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  7. #7
    Administrator
    Join Date
    May 2011
    Location
    Lakes Region, NH
    Age
    54
    Posts
    3,847
    I've swapped old to new box without problems before but I can't say I was keeping track of make, model, etc. They both have the same plugs as far as I know. I used to have some of each style around but I may not have any old ones left.

    It is strange that GM put the circuit on the back of the speedo for a few years. Maybe more parallel development stuff. Or maybe just saving a few nickels.

  8. #8
    Fuel Injected!
    Join Date
    Aug 2012
    Age
    39
    Posts
    24
    Thanks for the help guys. Got my truck back up and running so these should help me in the near future

Similar Threads

  1. Bluetooth OBD1 Module availability
    By phonedawgz in forum GM EFI Systems
    Replies: 3
    Last Post: 12-19-2012, 04:38 AM
  2. pinout needed
    By Matthiasbass in forum Other EFI systems and related topics
    Replies: 9
    Last Post: 11-08-2012, 04:17 AM
  3. ESC Electronic Spark Control module for TBI
    By woody80z28 in forum GM EFI Systems
    Replies: 2
    Last Post: 02-20-2012, 06:47 AM
  4. VSS from Speedo to ECM or DRAC/VSSB 4L60E
    By Nasty-Z in forum GM EFI Systems
    Replies: 23
    Last Post: 02-15-2012, 07:33 AM
  5. 7747 est module?
    By jameslleary in forum GM EFI Systems
    Replies: 6
    Last Post: 11-03-2011, 01:29 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •