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.
Coolant Level Control
The engine cooling system contains an engine coolant level switch to alert the driver in the event of a coolant loss. When the engine coolant level switch reads a low coolant level in the fill tank, the switch opens. Ignition 3 voltage is supplied by the instrument panel cluster (IPC) on the low coolant level indicator control circuit. When the IPC detects a high low coolant level indicator control circuit signal for more than 30 seconds, the IPC sends a Class 2 message to the drivers information center (DIC) to display the LOW COOLANT LEVEL message. The ground path is provided via the underhood fuse block to G103.
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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.