Coolant- How often to change
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Re: Coolant- How often to change (Joel Forman)
They say 100K, but if you are running a 99 I would do it this year. Make sure you use the Texaco Dexcool, not the Prestone. Last I knew, Prestone didn't meet GM specifications. You can get it pretty cheap at Wal Mart. Also, you can get distilled water there for $0.58 per gallon to mix with the Dexcool and use for the flush.
Le Mans Master
Joined: Apr 2002
Posts: 6,927
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From: Glendale NY
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18- '19
Re: Coolant- How often to change (vettenuts)
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They say 100K, but if you are running a 99 I would do it this year. Make sure you use the Texaco Dexcool, not the Prestone. Last I knew, Prestone didn't meet GM specifications. You can get it pretty cheap at Wal Mart. Also, you can get distilled water there for $0.58 per gallon to mix with the Dexcool and use for the flush.
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:iagree: I changed mine on my 98 coupe after 76,000 miles. Remember.....Dexcool and distilled water.
They say 100K, but if you are running a 99 I would do it this year. Make sure you use the Texaco Dexcool, not the Prestone. Last I knew, Prestone didn't meet GM specifications. You can get it pretty cheap at Wal Mart. Also, you can get distilled water there for $0.58 per gallon to mix with the Dexcool and use for the flush.
________________________________________ ________________________
:iagree: I changed mine on my 98 coupe after 76,000 miles. Remember.....Dexcool and distilled water.
Le Mans Master
Joined: Feb 2002
Posts: 6,937
Likes: 21
From: Waldorf MD
Re: Coolant- How often to change (Joel Forman)
According to owner's manual you should do it at 5 years or 150,000 miles whichever comes first. I changed my 98 C5 out at 5 years. Coolant was so clean, that I didn't even flush. Shop manual says if coolant is clean you don't need to flush. I drained out within 1 1/2 quarts of capacity anyway.
[Modified by Oldvetter, 9:38 AM 2/16/2004]
[Modified by Oldvetter, 9:38 AM 2/16/2004]
Racer
Joined: May 2000
Posts: 362
Likes: 0
From: Macomb Mi
Re: Coolant- How often to change (Oldvetter)
Ditto on Blue Thunder. I changed at 50,000, clean and clear, so I did not flush. Drain slowly so you get most of it out. I got all but about 1 1/2 qts. out. Use only Texaco and distilled water. Good Luck ! :cheers: :chevy :seeya
