You cannot use the OPCOM software itself to update to 199 safely. You need an external programmer like a PICkit 3 or PICkit 2 .
With GM moving to Secure Gateway and Global A architecture post-2015, Opcom 1.99 cannot communicate with newer vehicles (Astra K, Crossland X, Grandland). For modern cars, you need MDI or GDS2.
Firmware 1.99 unlocks diagnostic routines for over 120 different ECUs, including:
Open your OP-COM interface to confirm the chip model (look for Obtain the FW1.99 .hex file opcom firmware 199 hex file top
Understanding OP-COM Firmware 1.99: Everything You Need to Know About the Hex File
Firmware 1.99 is best paired with compatible software, such as .
: True V1.99 interfaces typically feature the PIC18F458 chip and an FTDI FT232RL or FT232RQ chip for data transfer. You cannot use the OPCOM software itself to
Opcom is a multiplexed diagnostic interface (hardware) that connects via USB to a Windows laptop. It communicates with GM’s vehicle bus systems (CAN, K-Line, UART) to read fault codes, perform actuator tests, program keys, and configure control modules.
This is the most popular modern chip in clones. If your device has this chip, a specialized 199 firmware file designed for the "K80" is needed.
Generally less stable than firmware 1.64 or 1.70, especially for advanced programming tasks. For modern cars, you need MDI or GDS2
After flashing, connect the Opcom to your PC and open the Opcom software (v1.99 or 1.99.3). Navigate to Settings → Interface Information . You should see:
The Firmware v1.99 is widely considered one of the best versions for newer Chinese clone interfaces based on the chip.