2002 GMC YUKON engine

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Page 292 of 443

GMC YUKON 2002  Owners Manual 5-9
Towing Your Vehicle
Consult your dealer or a professional towing service if
you need to have your disabled vehicle towed. See
ªRoadside Assistanceº in the Index. If you want to tow
your vehicle

Page 293 of 443

GMC YUKON 2002  Owners Manual 5-10 If Steam Is Coming From Your Engine
CAUTION:
Steam from an overheated engine can burn you
badly, even if you just open the hood. Stay away
from the engine if you see or hear steam coming
from it.

Page 294 of 443

GMC YUKON 2002  Owners Manual 5-11 If No Steam Is Coming From Your Engine
An overheat warning, along with a low coolant message,
can indicate a serious problem. See ªLow Coolant
Messageº in the Index.
If you get an engine overhe

Page 295 of 443

GMC YUKON 2002  Owners Manual 5-12
Cooling System
When you decide its safe to lift the hood, heres what
youll see:
8100 V8 Engines
All Other Engines
A. Coolant Surge Tank
B. Coolant Surge Tank Pressure Cap
C. Engine Fan
If the

Page 296 of 443

GMC YUKON 2002  Owners Manual 5-13
The coolant level
should be at or above
the FILL COLD 
mark. If it isnt, you
may have a leak at 
the pressure cap or 
in the radiator hoses,
heater hoses, radiator,
water pump or
somewhere else

Page 297 of 443

GMC YUKON 2002  Owners Manual 5-14 How to Add Coolant to the Coolant 
Surge Tank
If you havent found a problem yet, check to see if
coolant is visible in the surge tank. If coolant is visible
but the coolant level isnt at or abo

Page 298 of 443

GMC YUKON 2002  Owners Manual 5-15
CAUTION:
Adding only plain water to your cooling system
can be dangerous. Plain water, or some other
liquid such as alcohol, can boil before the proper
coolant mixture will. Your vehicles coolan

Page 300 of 443

GMC YUKON 2002  Owners Manual 5-17
4. With the coolant surge tank pressure cap off, start the
engine and let it run until you can feel the upper
radiator hose getting hot. Watch out for the engine
cooling fan.
By this time, the co