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Slacktide79

Do I have to use ACDELCO DEF fluid

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Hi all, 

 

Just got a new 2019 Colorado diesel. The manual says I have to use ACDELCO DEF fluid. Much cheaper using the Walmart brand. Is this bs or do I have to use ACDELCO DEF? Any feedback would be greatly appreciated.

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No.  DEF is DEF.  You don't want old stuff, as it does chemically change over time.

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No, your best bet is to find a truck stop that has it at the pump.  It is less expensive and always fresh since they have a high turn around.  Plus it being stored underground means it isn't subject to high temperatures which can effect the shelf life of DEF.

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Depends on how it was stored, but generally it stores well for at least a year.

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Absolutely.  And you have to only wear Chevrolet or GM clothing while you drive it, too.  :P

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thanks i am new to this as the last diesel i had was a 1999 Detroit DEF was not even invented yet 

Edited by RP53
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I save money and time by using my pee instead of stopping at a rest area.

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Ok, I lied. My usual gas station doesn't have def at the pump, so I bought O' Riley's house brand instead.

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I’ve used prestige and Walmart brand. All work fine if reasonably fresh (
The local station with DEF on the pump requires the big diesel nozzle. I could not use it.


Sent from my iPhone using Tapatalk

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GM Only recommends what makes them money.

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