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O.E. Replacement DRAC Module VSSB Module Tested Refurbished
O.E. Replacement DRAC Module VSSB Module Tested Refurbished

O.E. Replacement DRAC Module VSSB Module Tested Refurbished

Your Price: $125.00
In Stock.
Part ID:oe
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Broadcast Code help
4 chars left
Part Number help
8 chars left
Core Charge

This replacement OE (Original Equipment) module is produced based on the factory Broadcast Code and GM Part Number. Replacement modules for failed OE applications are readily available and in stock from UD Module. DRAC and VSSB Modules fail in several ways and contribute to other systems malfunctioning on the vehicle. We offer working solutions to OE module applications due to these modules no longer being supported or available from GM. You can rely on UD Module for a re-manufactured known-good tested and verified ready to plug and play solution.

This is a replacement for your failed factory module. We require both the broadcast code (big 3 or 4 letters) and the part number (under the big letters) for the product options boxes found on the page, but can do on either.

Module PZN with part number 16202908 or 16202915 cannot be ordered on this product page, see the PZN product page for how to order a replacement for this combination.

These modules are called or technically referred to as the following designations:

DRAC is Digital Ratio Adapter Controller (TBI DRAC, GM DRAC, Buffer Module)
VSSB is Vehicle Speed Sensor Buffer (TBI VSSB, GM VSSB, Speedometer Buffer)

The external VSSB/DRAC module was used in 1989-1995 TBI Gas Chevy and GMC Vehicles and from 1990-2002 in Chevy and GMC 6.2L and 6.5L DIESEL applications.

How To Order (help)


UD Module re-manufactures the various DRAC/VSSB modules and then creates the exact calibrated module you need for replacement or calibration. All we need is the Broadcast code (typically 3-characters, some with 4-characters) and/or the GM Part Number (under the 3-character code) and we build you that exact module

First, the module will likely need to removed from the vehicle to retrieve the information. You'll need the broadcast code and the GM part number off the old module for the order form above.

Broadcast Code - In Purple

Part Number - In Green




Label worn and can't be read?


Somewhat Unreadable

If the module's label is unreadable on one or the other details, shoot us a picture of the module's label and contact us, you can attach an image via email. Usually we can figure it out and give you the details for your order.

Completely Unreadable

If the module's label is missing or completely washed out and blank, it's not a problem, we can still provide a replacement. We will need some information from your vehicle to provide a correct replacement module, this replacement will be a perfect replacement for your vehicle. Follow this link to learn more about this process and place order.

Missing Module

Working on a vehicle that someone has taken the module, or it is missing for some unknown reason? It's not a problem, we can still provide a replacement. We will need some information from your vehicle to provide a correct replacement module, this replacement will be a perfect replacement for your vehicle.
Visit this link to learn more about this process and place order.


Common Symptoms of DRAC VSSB Failure

  • ODB-I Fault code for VSS
  • ODB-II Fault code for VSS
  • Inoperative Speedometer (stays at zero)
  • Unresponsive speedometer (sits at zero then jumps to 15)
  • Jumpy Speedometer
  • Inoperative Cruise Control
  • ABS Brake System Faults
  • Transmission shifting problems 4L60E
  • Transmission shifting problems 4L80E