What type of coolant should i put in my 98 sonoma

James Castner

Asked by Feb 17, 2016 at 09:25 PM about the 1998 GMC Sonoma 2 Dr SLS Sport Extended Cab SB

Question type: Maintenance & Repair

I accidentally put green antifreeze in my radiator
After i changed my t-stat. And i need to know if
that can mess my engine up and what kind of
coolant i should use from now on?

8 Answers


it's ethylene glycol can be green or red or clear...but 50/50 mix with water is the designed formulae~ DO NOT use plain water...this is a recipe for disaster....drain intermediately and fill with the correct 50/50 mix.. okay...thanks for asking~

James Castner

Yes i know not to put just water but i was looking to find out if mixing dex cool and the green stuff is alright?

1 out of 1 people think this is helpful.

Ethylene Glycol could never mix with Ethylene Glycol...they are the same~ water and you'll have Flint, Michigan all over again~


No - do not mix those two together


why not? they are the same material? the properties are identical~


Because Chevy said so. Remember Bob - 25 years in the car business backs up my answers - its not a crap shoot over here

Best Answer
James Castner

Ok thanks so i will flush the system and do u know witch one i should be using?


obviously "GM Dexcool"~

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