Many thanks for the help. Took my truck to a dealer and was told the injectors would fall under warranty but the flow rate,???, was low so that voided the warranty. Took the truck to another dealer and they changed all injectors under warranty, no charge. Feel like I just hit the lottery since the first dealer wanted almost $5000 to repair the injectors.
Don't want to look a gift horse in the mouth but had just changed my oil and filter (Amsoil) and they replaced it with regular oil. not a bad exchange for $5K.

Now tell me about adding oil and diesel additve to my fuel when I fill up. A buddy tells me I should put in a quart of 2 cycle oil plus some of the diesel fuel additive. Is this good advice? what do most people do?
Again thanks for the help and sorry to be long winded and short on mechanical skill.
Knapper