Just bought 2003 Z71 w/145,000 miles. Fluid change question...

[Tonyrodz]

I did mine with Universal yellow. I'm disenchanted with dexcool.

Why? I have dexcool in my 03 with no issues. I flushed it maybe 2-3 yrs ago.

 

[SnowDrifter]

Why? I have dexcool in my 03 with no issues. I flushed it maybe 2-3 yrs ago.

See enough of them with ruined cooling systems. I'd just assume stay away, stick with tried and true, and change it every 4 years

 

[Bombsquad85]

So even tho the owners Manual says dexcool it doesn't matter? That's cool I'm gonna change my coolant soon and wasn't sure if it mattered

 

[95escahoe]

do you guys see any problems with the stock cooling liquid, w Dexcool, I see people blame/lawsuits this additive for internal problems, do you replace it?

If you maintain it like you should you'll have no issues, some people don't change it when they should, let air get in the system, mix non Dex with it, all a matter of preference I still run Dex with zero issues


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[95escahoe]

So even tho the owners Manual says dexcool it doesn't matter? That's cool I'm gonna change my coolant soon and wasn't sure if it mattered

You can run non Dex if you like many people do just make sure to flush it good and get all the Dex out if you leave any in there it will gel up


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[Bombsquad85]

You can run non Dex if you like many people do just make sure to flush it good and get all the Dex out if you leave any in there it will gel up


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So just run a bunch of water through it before adding coolant right? Until it comes out clear

 

[pcowner]

95escahoe,

Smart, very smart..

 

[pcowner]

So overall, should I just ditch GM and go with Toyota/Honda/Subaru/Volvo ?

I've had Honda Civic for over 16 years, and didn't know where is what in that and didn't change any transmission/spark plugs until earlier this year.

 

[95escahoe]

95escahoe,

Smart, very smart..

What are you talking about? if your buying a high mileage truck first thing you should do is all your fluids, even if they look good that way you know when they were done and have some kinda idea of when they should be done next, I'd rather spend a lil extra money on doing the fluids then a month or 2 down the road need a trans etc.


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[pcowner]

I'd probably saw someone post about a transmission fluid change on a different thread. Makes sense.