GMC 2002 Sierra - Manual (Page 342)

5-15
NOTICE:
Engine damage from running your engine
without coolant isn’t covered by your warranty.
See “Overheated Engine Protection Operating
Mode” in the Index.
NOTICE:
When adding coolant, it is important that you use
only DEX
- COOL
R
(silicate - free) coolant.
If coolant other than DEX - COOL is added to
the system, premature engine, heater core or
radiator corrosion may result. In addition, the
engine coolant will require change sooner
-- at
30,000 miles (50 000 km) or 24 months,
whichever occurs first. Damage caused by the
use of coolant other than DEX
- COOL
R
is not
covered by your new vehicle warranty.
How to Add Coolant to the Coolant Surge
Tank --Gasoline Engines
If you haven’t found a problem yet, check to see if
coolant is visible in the surge tank. If coolant is visible
but the coolant level isn’t at or above the FILL COLD
mark, add a 50/50 mixture of clean, drinkable water and
DEX
- COOL
R
coolant at the coolant surge tank, but be
sure the cooling system, including the coolant surge tank
pressure cap, is cool before you do it. See “Engine
Coolant” in the Index for more information.