what is the recommended coolant for a 2006 silverado with 5.3 engine

Asked by Marjorie Dec 03, 2014 at 08:44 PM about the 2006 Chevrolet Silverado 1500 LS Extended Cab RWD

Question type: Maintenance & Repair

my husband wants to flush the red coolant out and put in the green coolant What is the
right thing to do

2 Answers
30,895

Tom answered 9 years ago

I found you can't mix green & red anti-freeze. The green will make the red gunk up. However, you can flush the red out and replace with green. The green is supposed to be better for the gaskets.

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56,530

TransAm77 answered 9 years ago

Yes NEVER mix green and orange(dex-cool). If you put green in make sure ALL of the dex-cool is out of the cooling system.

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