Antifreeze Coolant Xchange

Your dealer will test your antifreeze to see if it's still effective. It's probably worth it on diesels but on gassers I'd just change it out once a year or so.

I know for the Duramax's its every 50K miles. I doubt mine has ever been changed, bought used, so thats up on my list of things to do. Make sure you are using the correct coolant as well.

agesilaus wrote:
Your dealer will test your antifreeze to see if it's still effective. It's probably worth it on diesels but on gassers I'd just change it out once a year or so.

Every year? Really not needed anymore.

Most gassers are now 100,000 miles or 5 years. I do mine every 40,000. I should go by year but don't.

I know for the Duramax's its every 50K miles.

You know from who? Certainly not from GM engineers. :R

I stick to what the "severe service" maintenance schedule says, as outlined in my owner's manual.

I have the coolant in my Ram changed every three years. I'm not a big believer in any fluids or lubes marketed as "extended life".

okay, thanks....no long trips planned soon, so guess I'll get it done.

my old dodger diesel said 5 years or 100K miles.

it was 5 years old, 2005 model, when I got it so coolant and transmission fluids changed.

check your owners manual as an old dodge like mine needs a special coolant.

Turtle n Peeps wrote:

I know for the Duramax's its every 50K miles.

You know from who? Certainly not from GM engineers. :R

I know that from my owners manual, if you would read the thing, you might learn something. They tend to come in handy with things like this. About the only thing I vary on from it is oil changes and FF changes, because I don't use what comes in it from the factory. Butter me up and grill me for that too.

Goose2448 wrote:

Turtle n Peeps wrote:

I know for the Duramax's its every 50K miles.

You know from who? Certainly not from GM engineers. :R

I know that from my owners manual, if you would read the thing, you might learn something. They tend to come in handy with things like this. About the only thing I vary on from it is oil changes and FF changes, because I don't use what comes in it from the factory. Butter me up and grill me for that too.

Hmmmmmmm Funny, I did read mine and my Duramax manual says the same as THESE GUYS.

Which is the same what THESE GUYS SAY.

I have more sources. Would you like more? All the same as my OP manual. 5/150K

No biggie. More than likely just a misprint in yours. :W