Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Module Replacement
The GFM2, or UIM (upfitter interface module), is located behind the glove box. If it is necessary to replace the GFM2 the program (source file) needs to be obtained from the upfitter and uploaded to the new module via the upfitter GUI (graphical user interface). The program cannot be copied from the original GFM2, and is not stored in any other module or on PTS: There is no backup file. Contact the upfitter to obtain a copy of the GFM2 source file. Refer to: Body Control Module (BCM) - Component Location .
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.