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.
Other IPM Functions
The instrument panel module (IPM) performs multiple body control functions. The IPM can control devices directly connected to its outputs based on input information. The IPM evaluates this information and controls certain body control systems by commanding outputs on or off. The IPM inputs can be:
- Sensors and switches that are directly connected to the IPM
- GMLAN serial data messages received from other vehicles systems connected to the low or high speed GMLAN serial data links
The IPM is also capable of controlling other vehicle systems that are not directly wired to the IPM, through serial data messages. Some of the functions that the IPM controls or contributes to, are:
- Audible warnings-Refer to Indicator/Warning Message Description and Operation .
- Column lock-Refer to Steering Wheel and Column Description and Operation .
- Exterior lighting control and BASS-Refer to Exterior Lighting Systems Description and Operation .
- Interior lighting-Refer to Interior Lighting Systems Description and Operation .
- Headlamp washer-Refer to Headlamp Washer System Description and Operation .
- Horn control-Refer to Horns System Description and Operation .
- Park brake switch-Refer to Park Brake System Description and Operation .
- Retained accessory power-Refer to Power Mode Description and Operation .
- Remote start-Refer to Starting System Description and Operation .
- Steering wheel control switches-Refer to Radio/Audio System Description and Operation and Cruise Control Description and Operation (Conventional Cruise Control) or Cruise Control Description and Operation (Adaptive Cruise Control) .
- Traction control switch-Refer to ABS Description and Operation .
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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.