GMC 2007 Envoy - Manual (Page 405)

Notice: Use of the incorrect automatic
transmission fluid may damage your vehicle,
and the damages may not be covered by
your warranty. Always use the automatic
transmission fluid listed in Recommended
Fluids and Lubricants on page 517.
• After adding fluid, recheck the fluid level as
described under “How to Check Automatic
Transmission Fluid,” earlier in this section.
• When the correct fluid level is obtained, push
the dipstick back in all the way; then flip the
handle down to lock the dipstick in place.
Engine Coolant
The cooling system in your vehicle is filled with
DEX-COOL
® engine coolant. This coolant is
designed to remain in your vehicle for five years or
150,000 miles (240 000 km), whichever occurs
first, if you add only DEX-COOL
® 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 on page 408.
A 50/50 mixture of clean, drinkable water and
DEX-COOL
® coolant will:
• Give freezing protection down to
−
34°F (
−
37°C).
• Give boiling protection up to 265°F (129°C).
• Protect against rust and corrosion.
• Help keep the proper engine temperature.
• Let the warning lights and gages work as
they should.
Notice: Using coolant other than DEX-COOL ®
may cause premature engine, heater core, or
radiator corrosion. In addition, the engine
coolant may require changing sooner,
at the first maintenance service after each
30,000 miles (50 000 km) or 24 months,
whichever occurs first. Any repairs would
not be covered by your warranty. Always use
DEX-COOL
® (silicate-free) coolant in your
vehicle.
405