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By Troy
How to change EPROM PIN code and VIN number in GM's instrument cluster IPC
PIN and VIN can also be changed in the IPC electronically using the GM DPS tool and my custom DPS PIN and VIN change files. See the service below.
PIN and VIN change DPS files service.
How to manually change the EPROM PIN code and VIN in an 8-inch Insignia instrument cluster.
This tutorial shows how to change the VIN and security PIN stored in the IPC EPROM chip.
Tools you will need:
Soldering iron and solder.
A hot air rework station or solder wick for removing the EPROM chip.
A chip programming device. I use the GQ-4X Willem Programmer
A hex editor. I use Synalyze Pro for Apple Mac.
The process is very straightforward:
Take apart the IPC and remove the circuit board.
Remove the 8-pin SOIC EPROM chip.
Place the EPROM chip in the chip programmer.
Read the chip and save the chip's .bin file.
Open the .bin file in a hex editor.
Find the location of the VIN and four-digit PIN code.
Change the VIN and PIN code to the ones from your car.
Save the edited .bin file.
Use the chip programmer to write the edited .bin file onto the EPROM chip.
Solder the EPROM chip back to the circuit board.
After doing this, the car's mileage will display correctly on the IPC unit.
You will now be able to program the IPC unit via GM online SPS using your car's original four-digit PIN code.
You will receive an IPC DTC error from GDS2, which states "Incorrect Immobilizer Identifier Received"
To eliminate this DTC error, you will need to use GM's online SPS immobilizer learn to delete your car's keys and relearn your car's keys.
There's a much faster method for changing the VIN and PIN in the instrument cluster using GM DPS software.
However, if you want to change the four-digit PIN code and VIN the cheap way, you will need to remove the EPROM chip to do it.
This process can also be used to change the VIN and PIN in the BCM module and the four-inch IPC EPROM chip.
VIN location in the hex editor.
Four-digit PIN code location in the hex editor.
Circuit Board.
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