Overheated Engine Protection; Operating Mode; Cooling System - Chevrolet Impala 2007 Owner's Manual

Overheated Engine Protection

Operating Mode

This emergency operating mode allows your
vehicle to be driven to a safe place in an
emergency situation. If an overheated engine
condition exists, an overheat protection mode
which alternates firing groups of cylinders helps
prevent engine damage. In this mode, you
will notice a significant loss in power and engine
performance. The coolant temperature gage
will indicate an overheat condition exists. Driving
extended miles (km) and/or towing a trailer in
the overheat protection mode should be avoided.
Notice: After driving in the overheated
engine protection operating mode, to avoid
engine damage, allow the engine to cool before
attempting any repair. The engine oil will be
severely degraded. Repair the cause of coolant
loss, change the oil and reset the oil life
system. See Engine Oil on page 310.
326

Cooling System

When you decide it is safe to lift the hood, here is
what you will see:
3.5L V6 Engine shown, 3.9L Engine similar
A. Coolant Recovery Tank
B. Pressure Cap
C. Electric Engine Cooling Fans