View Full Version : Dexcool antifreeze

03-30-2008, 09:21 AM
Was told at my last oil change that my antifreeze needed topping up snd that I needed a special antifreeze so I looked in my manual and found the name of the stuff I was suppose to use then I looked on line to see if there was an alternative and lo and be hold ther are all these horror stories about Dexcool and the problems that it is causing .Now I am a little concerned. My question -can I do a thorough flush and use something else before I start getting leeks .My vehicle is a 2004 chev 1/2 ton with a 5.3 engine.Any body with any info or advice .

03-30-2008, 10:05 AM

Apparently the biggest problem with Dexcool is people not checking it often enough and topping it up if need be.

I had my 98 Grand Prix 3.1 flushed and the green stuff put in around 65K, never had any problems for 100K after that, and the guy that bought it is still driving it with no problems.

Some say no problem to change it after a thorough flush, and some say stick with Dexcool, so I guess it's up to you!

There's some good reading about it in the above links..

03-30-2008, 11:43 AM
do a complete flush and go with Prestone All Makes All Models. Pretty sure it's GM approved.

03-30-2008, 04:59 PM
yup get rid of that dexcool before it causes leaks everywhere, mines been fine for years on regular prestone, had to replace many leaking parts cuz of that dexcool.

04-03-2008, 02:09 AM
if ur truck is still under warrenty i would stick with dexcool in my own opinion as a mechanic the only time i seen problems was with 3.1 3.4 and 3.8l motors and the cause of failliers was with the intake gaskets and not the coolant it is a miss conception about that fact if there is going to be a leak it will happen with any type of collents just dont mix green with red then u will have problem the cemistry just dont mix