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Overheated Engine Protection
Operating Mode
If an overheated engine condition exists and the
REDUCED ENGINE POWER message is displayed, an
overheat protection mode which alternates firing
groups of cylinders helps prevent engine damage. In
this mode, you will notice a loss in power and engine
performance. This operating mode allows your vehicle to
be driven to a safe place in an emergency. 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 5-14.
Cooling System
When you decide it is safe to lift the hood, here is what
you will see:
A. Coolant Surge Tank
B. Coolant Surge Tank Pressure Cap
C. Engine Cooling Fan
5-30
Summary of Contents for GMC Yukon Denali 2005
Page 5: ...These are some examples of symbols that may be found on the vehicle v...
Page 6: ...NOTES vi...
Page 35: ...Put someone on it Get it up to speed Then stop the vehicle The rider does not stop 1 29...
Page 141: ...NOTES 3 3...
Page 142: ...Instrument Panel Overview 3 4...
Page 410: ...5 110...