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.
Terrain Select Switch
The terrain select switch is used to communicate driver commands of various vehicle control systems related to vehicle ride height, traction, and stability control. The switch includes an Auto setting and a Neutral setting. The transfer case range select switch is hardwired directly to the IPC. The switch position is read by the IPC and is communicated to the BCM via the CAN-B bus. The BCM then rebroadcasts this information onto the CAN-C bus where the DTCM is a receiver.
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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.