Are all green coolents the same?

Tiny
IMPALA1992
  • MEMBER
  • 2003 CHEVROLET IMPALA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 109,000 MILES
Are all 50/50 coolents the same? Alright to use PEAK green coolent for GM models 1998 and earlier for my chevy impala 2003?
Saturday, September 12th, 2015 AT 4:24 PM

3 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
No, they are definitely not the same. Your car needs a coolant that is silicate free like Dexcool. When you change it over you will have to thoroughly flush every bit of green coolant out.
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Sunday, September 13th, 2015 AT 7:16 AM
Tiny
IMPALA1992
  • MEMBER
  • 10 POSTS
But the dexcool was already flushed all the way out and mechanic used green coolant cause of some problems dexcool has. I topped off my resivore with green coolant but it's for models 1998 and earlier. Would that cause a check engine light?
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Sunday, September 13th, 2015 AT 12:31 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
It's the green that needs to be flushed out. Dexcool doesn't have problems. The issues come up when the cooling system is operated with air in the system. You need to flush it and put the Dexcool or equivalent back in.
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Sunday, September 13th, 2015 AT 12:41 PM

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