should I change my Dexcool at 40,000 miles


Asked by May 03, 2016 at 11:44 PM about the 2003 Buick LeSabre Custom Sedan FWD

Question type: Maintenance & Repair

my dex cool looks good  but that doesn't mean  anything they say with age  
and time .  so I have never done a complete Dexcool flush  and add new  
dexcool  . how would this be done the easy way without opening all those
bleed block screws.?

2 Answers


Drain the coolant from the petcock on the bottom of the radiator. Add new coolant to the reservoir/hoses, warm up and add fluid to get to the proper level, then do it again.

1 of 1 people found this helpful.

Two thing to check (1) freeze protection (2) acidity You can buy an inexpensive tester that will tell you how much freeze protection you have. You can also buy text strips that tell about acidity. If both test pass ok, then just add an additive for water pump lube and antirust.

1 of 1 people found this helpful.

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