2008 GMC CANYON engine overheat

How to Add Coolant to the Coolant
Recovery Tank
If you have not found a problem yet, but the coolant
level is not at the FULL COLD mark, add a 50/50
mixture of clean, drinkable water and DEX-COOL
®
engine coolant at the coolant recovery tank.
SeeEngine Coolant on page 5-26for more information.
{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’s
coolant warning system is set for the proper
coolant mixture. With plain water or the wrong
mixture, the engine could get too hot but you
would not get the overheat warning. The
engine could catch re and you or others
could be burned. Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
®coolant.Notice:In cold weather, water can freeze and crack
the engine, radiator, heater core and other parts.
Use the recommended coolant and the proper
coolant mixture.
{CAUTION:
You can be burned if you spill coolant on hot
engine parts. Coolant contains ethylene glycol
and it will burn if the engine parts are hot
enough. Do not spill coolant on a hot engine.
When the coolant in the coolant recovery tank is at
the FULL COLD mark, start your vehicle.
5-33

If the overheat warning continues, there is one more
thing you can try. Add the proper mixture directly to the
radiator, but be sure the cooling system is cool before
you do it.
{CAUTION:
Steam and scalding liquids from a hot cooling
system can blow out and burn you badly. They
are under pressure, and if you turn the radiator
pressure cap — even a little — they can come
out at high speed. Never turn the cap when the
cooling system, including the radiator pressure
cap, is hot. Wait for the cooling system and
radiator pressure cap to cool if you ever have
to turn the pressure cap.
How to Add Coolant to the Radiator
1. Remove the radiator pressure cap when the
cooling system, including the upper radiator
hose, is no longer hot. Turn the pressure cap
slowly counterclockwise about one full turn.
If you hear a hiss, wait for that to stop.
A hiss means there is still some pressure left.
2. Keep turning the cap to remove it.
3. Fill the radiator with the proper DEX-COOL
®
coolant mixture, up to the base of the ller
neck. SeeEngine Coolant on page 5-26for more
information about the proper coolant mixture.
5-34

D
Daytime Running Lamps..................................3-14
Defensive Driving............................................. 4-2
Disc, MP3......................................................3-64
Doing Your Own Service Work........................... 5-4
Dome Lamp...................................................3-17
Dome Lamp Override......................................3-17
Door
Locks.......................................................... 2-7
Power Door Locks......................................... 2-8
Programmable Automatic Door Locks............... 2-8
Rear Door Security Locks............................... 2-9
Rear Doors.................................................. 2-9
Driver Information Center (DIC).........................3-38
DIC Operation and Displays..........................3-38
DIC Warnings and Messages........................3-42
Driving
At Night.....................................................4-24
Before a Long Trip......................................4-25
Defensive..................................................... 4-2
Drunken....................................................... 4-2
Highway Hypnosis.......................................4-25
Hill and Mountain Roads..............................4-26
In Rain and on Wet Roads...........................4-24
Off-Road....................................................4-11
Recovery Hooks..........................................4-31
Rocking Your Vehicle to Get it Out.................4-30
Winter........................................................4-27
E
EDR .............................................................7-16
Electrical System
Add-On Equipment.....................................5-110
Engine Compartment Fuse Block.................5-111
Fuses and Circuit Breakers.........................5-110
Windshield Wiper Fuses.............................5-110
Engine
Air Cleaner/Filter.........................................5-19
Check and Service Engine Soon Light............3-34
Coolant......................................................5-26
Coolant Heater............................................2-22
Coolant Temperature Gage...........................3-33
Drive Belt Routing.......................................6-15
Engine Compartment Overview......................5-12
Exhaust.....................................................2-37
Fan Noise..................................................5-36
Oil .............................................................5-15
Oil Life System...........................................5-18
Overheating................................................5-29
Running While Parked..................................2-38
Starting......................................................2-21
Event Data Recorders.....................................7-16
Exit Lighting...................................................3-17
Extender, Safety Belt.......................................1-32
Exterior Cargo Lamps......................................3-16
Exterior Lamps...............................................3-13
4