Pontiac 1996 Grand Am Owner's Manual page 245

NOTICE:
When adding coolant it is important that you use
DEX-COOL
TM
(orange-colored, silicate-free)
coolant meeting
GM
Specification 6277M.
If silicated coolant 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.
What to Use
Use a mixture of one-half clean water (preferably
distilled) and one-half DEX-COOL
TM
(orange-colored,
silicate-free) antifreeze that meets GM Specification
6277M, which won't damage aluminum parts. Use
GM Engine Coolant Supplement (sealer) (GM Part
No. 3634621) with any complete coolant change. If you
use this mixture, you don't need to add anything else.
.
Adding only plain water to your cooling system
can be dangerous. Plain water,
or some
other
liquid like alcohol, can bo'il before the proper
coolant mix will. Your vehicle's coolant warning'
system is set for the proper coolant mix. With
plain water or the wrong mix, your engine could
get too hot but you wouldn't get the overheat
warning. Your engine could catch
fire
and you or
others could be burned. Use a 5060 mix of clean
water and DEX-COOL
(orange-colored,
silicate-free) antifreeze.
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