pronstar wrote:
<--- another vote for dropping the pan and changing the filter.
Never been a fan of power-flush exchange machines.
Any fluid that goes into my truck, is poured from a bottle that I buy.
Depends what the factory says is OK. Apparently flushes are OK for the six speeds in the Silverados according to another poster here(I haven't checked). I can tell you that I had a Honda Accord and power flushes were not recommenced.
I have a standard 100K power train warranty from the factory (as anybody else who bought their truck new). I figure the dealer isn't going to perform any operation on the truck that will cost them a repair on their dime.