2009 GMC YUKON engine

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Page 424 of 576

GMC YUKON 2009  Owners Manual Cold Check Procedure
Use this procedure only as a reference to determine if
the transmission has enough �uid to be operated safely
until a hot check procedure can be made. The hot check
procedure is t

Page 425 of 576

GMC YUKON 2009  Owners Manual Hot Check Procedure
Use this procedure to check the transmission �uid level
when the transmission �uid temperature is between
160°F and 200°F (71°C and 93°C).
The hot check is the most accurate me

Page 426 of 576

GMC YUKON 2009  Owners Manual Consistency of Readings
Always check the �uid level at least twice using the
procedure described previously. Consistency (repeatable
readings) is important to maintaining proper �uid level. If
reading

Page 427 of 576

GMC YUKON 2009  Owners Manual {CAUTION:
An electric engine cooling fan under the hood can
start up even when the engine is not running and
can cause injury. Keep hands, clothing, and tools
away from any underhood electric fan.
{CA

Page 428 of 576

GMC YUKON 2009  Owners Manual What to Use
{CAUTION:
Adding only plain water to the cooling system can
be dangerous. Plain water, or some other liquid
such as alcohol, can boil before the proper coolant
mixture will. The vehicle’

Page 429 of 576

GMC YUKON 2009  Owners Manual Notice:If an improper coolant mixture is used, the
engine could overheat and be badly damaged.
The repair cost would not be covered by the vehicle
warranty. Too much water in the mixture can
freeze an

Page 430 of 576

GMC YUKON 2009  Owners Manual The coolant surge tank is located in the engine
compartment on the passenger side of the vehicle.
SeeEngine Compartment Overview on page 5-14for
more information on location.
The coolant level should

Page 431 of 576

GMC YUKON 2009  Owners Manual {CAUTION:
An electric engine cooling fan under the hood can
start up even when the engine is not running and
can cause injury. Keep hands, clothing, and tools
away from any underhood electric fan.
{CA