
yellow
blue
6-25
NOTICE:
Your radiator cap is a 15 psi (105 kPa)
pressure
-
type cap and must be tightly installed to
prevent coolant loss and possible engine damage
from overheating. Be sure the arrows on the cap
line up with the overflow tube on the radiator
filler neck.
Thermostat
Engine coolant temperature is controlled by a thermostat
in the engine coolant system. The thermostat stops the
flow of coolant through the radiator until the coolant
reaches a preset temperature.
When you replace your thermostat, an AC
R
thermostat
is recommended.
Engine Coolant
The cooling system in your vehicle is filled with
DEX
-
COOL
R
engine coolant. This coolant is designed
to remain in your vehicle for 5 years or 150,000 miles
(240 000 km), whichever occurs first, if you add only
DEX
-
COOL
R
extended life coolant.
The following explains your cooling system and how to
add coolant when it is low. If you have a problem with
engine overheating, see “Engine Overheating” in
the Index.
A 50/50 mixture of clean, drinkable water and
DEX
-
COOL
R
coolant will:
D Give freezing protection down to
-
34
_F (
-
37
_C).
D Give boiling protection up to 265_F (129_C).
D Protect against rust and corrosion.
D Help keep the proper engine temperature.
D Let the warning gages work as they should.
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
NOTICE: (Continued)
Summary of Contents for 1999 Suburban
Page 6: ...yellowblue vi Model Reference This manual covers these models 4 Door Utility Suburban ...
Page 70: ...yellowblue 1 64 NOTES ...
Page 138: ...yellowblue 2 68 Instrument Panel ...
Page 242: ...yellowblue 4 60 NOTES ...
Page 350: ...yellowblue 6 70 NOTES ...
Page 397: ...yellowblue 7 47 Maintenance Record DATE ODOMETER READING SERVICED BY MAINTENANCE PERFORMED ...
Page 398: ...yellowblue 7 48 Maintenance Record DATE ODOMETER READING SERVICED BY MAINTENANCE PERFORMED ...
Page 412: ...yellowblue 8 14 NOTES ...