Engine coolant, Engine coolani -33 – GMC 2003 Sierra User Manual
Page 408
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Engine Coolant
The cooling system in yoor vehicle is filled wilfi
DEX-COOL* engine coolanl. This coolant Is designed
to remain in /our vehicle for 5 years or 150.000 miies
(240 000 km), whichever occurs first, if you add only
DEX'COOL* extended life coolant.
The following explains your cooling system and how (□
add coolant whan it is low. li you have a problem
with engine overheating, see Engine Ove
ftìpe
5-36.
A 5W50 mixtuTB of dean, drinkable water and
DEX-COOL* coolant willt
%
Give fraezing protection down to -34"
F (
-37“C).
^ Give boiling pmlectlon up to 265“F (129“C),
% Protect agalnsl rust and corrosion.
\ Help keep the proper engine tamperalure.
\ Lei the warning lights and gages work as they
should.
Notice:
Whan adding coofant, ft is important that
you use only DEX-COOL® (siliOBie-freeJ coolant.
If coolant other than DEX-CODL® is added to
the syaleiti, premature engine, heater core or
radiator corrosion may result. In addition, the engirte
coolant will reifuire change sooner at 30,000 miles
(50,000 km) or 24 months, whichever occurs first.
Damage caused by the use of coolant other
than □EX-COOL'^ is not covered by your new vehicle
warranty.
5-33