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usmarine0905 July 11th, 2011 9:32 PM

coolant what type
Doing my yearly prevented maintance on my rig... this year it's belts, all hoses, plugs,wires,cap,rotor. so my question is a simple one I hope, my ride is a 98 2500, 5.7 vortec, silverado ext cab... the coolant is the Orangish color. So do I go back wtih orange, or can it be mixed with another, if so which color? I have seen containers in stores that state mixes with all types..but I dont beleive everything I read. but if I need to reflush and refill then ok, currently the coolant is clean, and tests fine... any advice???

country_09 July 12th, 2011 8:45 AM

i wouldn't mix...bein orange its probably dex-cool and if you mix with dex-cool the fluid will get all gummed up inside the hoses and you definitely don't want that. but if you're doin a flush and fill then you should be able to use any coolant.

but im pretty sure that the green coolant is usually used for cars and the orange is for trucks because of its coolin properties

usmarine0905 July 12th, 2011 11:38 AM

So i can only get the Dex-cool Orange from GM??

country_09 July 12th, 2011 12:12 PM

you don't have to if you're doin a flush...if you do a flush then use whatever you want. i just know that the orange is for trucks and green is for smaller vehicles. you don't have to use orange BUT i would stick with it

usmarine0905 July 12th, 2011 8:30 PM

Ok, thanks.. I really want to put back what came out,,, Orange... Is that a dealer only item or can I get the orange from an auto parts place.....

ToooTall1 July 12th, 2011 9:05 PM

Wally World (walmart)sells Dex-cool

usmarine0905 July 13th, 2011 5:18 AM


Night Train July 15th, 2011 10:14 AM

Originally Posted by usmarine0905 (Post 186639)
Ok, thanks.. I really want to put back what came out,,, Orange... Is that a dealer only item or can I get the orange from an auto parts place.....

You can buy Dex Cool or Prestone (both orange) at your local Autozone. They sell it in 50/50 or 100%. You'll have to mix the 100%. I use Prestone in my 97 5.7 1500. Never had an issue so far. (original owner)

I believe you can mix the Dexcool and Prestone as long as they are both orange and the correct mixture.

slw210 July 15th, 2011 11:53 AM

I wouldn't change the coolant just to be changing it. If it tests good then it is good.

The color is just a dye, so be careful when buying. All antifreeze/coolants are glycol based either Ethylene or Propylene the major differences are in the corrosion inhibitors.

To dispel rumors:

According to the DEX-COOL manufacturer, "mixing a 'green' [non-OAT] coolant with DEX-COOL reduces the batch's change interval to 2 years or 30,000 miles, but will otherwise cause no damage to the engine."[20] DEX-COOL antifreeze uses one of two inhibitors: sebacate and 2-EHA (2-ethylhexanoic acid), which works well with the hard water found in the US, but is a plasticizer which can cause gaskets to leak.[14]
Read the Wiki for more info. Take note of the GM DEXCOOL lawsuits.

usmarine0905 July 15th, 2011 9:27 PM

thank you everyone... I am going to catch, strain, and reuse my antifreeze,Dexcool.. when I change out my hoses this weekend and just top off with the same product...Never had an issue with my truck...255K.... runs strong..perfect runner. Just replaced the starter last weekend, it was the original....

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