Will the automatic fluid type make a difference e in my 2003 Buick lesabre

2003 Buick lesabre automatic v6 3800

dextron VI comes in many type the dealer gave me 10 -9118 yet other companies say any backward fluid will work , is this true to adding a conventional fluid.

Yes it is. Don’t over-think this. Dextron is backwards compatible.


any type synthetic or conventional??

any type synthetic or conventional??

Any type Dextron or universal synthetic or conventional is perfectly fine. My preference is Dextron VI Just don’t pour Mercon or Toyota or Honda spec ATF.

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*Thanks this explains a lot so I can use the Dextron VI in my 2003 Buick *