2006 Buick Lucerne Coolant Change?

[3putter]

My Buick with the 4.6L Northstar has 72k on the clock with original coolant. Owners manual says 5 years or 150k whichever comes first. Current coolant tests fine and appears clean.
Do you think I should change it out? My local Firestone Store is running a special on it. They say they use Peak that is compatible with all fluids incl Dex Cool. What say you?

Thanks.

 

[Chris Meutsch]

I'd use Dex Cool and make sure the change is done correctly, including full burping and filling of the system.

 

[Donald]

How did you test the coolant? By freezing it? Or send it out for an analysis? Worn out coolant still protects against freezing, just not against corrosion.

I would do two radiator drain & fills and you are good to go. Forget the flush. Use a real Dexcool, not an all makes/all models. Doesn't have to be a GM Dexcool, but should be a real Dexcool.

 

[sciphi]

Change it. As others stated, it's time or mileage. Your Lucerne is over on time, and so it should be changed.

I like the 2 radiator drain/fills method with real Dex.

 

[JHZR2]

Originally Posted By: Chris Meutsch
I'd use Dex Cool and make sure the change is done correctly, including full burping and filling of the system.


+1

 

[Bgallagher]

Originally Posted By: JHZR2
Originally Posted By: Chris Meutsch
I'd use Dex Cool and make sure the change is done correctly, including full burping and filling of the system.


+1


+2

 

[johnsmellsalot]

Just do a drain and fill with Dex Cool. That way you don't void your warranty. Also Dex Cool is compatible with the seals and metals inside your engine.