What To Use; Checking Coolant - GMC Envoy Owner's Manual

What to Use

Use a mixture of one-half clean, drinkable water and
®
one-half DEX-COOL coolant. If you use this coolant
mixture, you don't need to add anything else.
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
vehicle's coolant warning system is set for the
proper coolant mixture. With plain water or the
wrong mixture, your engine could get too hot
but you would not get the overheat warning.
Your engine could catch fire and you or others
could be burned. Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
Notice: If you use an improper coolant mixture,
your engine could overheat and be badly damaged.
The repair cost would not be covered by your
warranty. Too much water in the mixture can freeze
and crack the engine, radiator, heater core and
other parts.
5-26
®
coolant.
If you have to add coolant more than four times a year,
have your dealer check your cooling system.
Notice: If you use the proper coolant, you do not
have to add extra inhibitors or additives which claim
to improve the system. These can be harmful.

Checking Coolant

The vehicle must be on a level surface. When your
engine is cold, the coolant level should be at FULL
COLD, or a little higher.
The engine coolant
recovery tank is in the
engine compartment
on the passenger's side of
the vehicle. The cap
has this symbol on it.
See Engine Compartment
Overview on page 5-12
for more information
on location.