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21 5.3 lit Trail Boss w/no AFM/DFM and stop start from factory

Trailboss74

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Was wondering the reliability of these with the factory deletion. are they more reliable than the regular models.
 

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they both have the same hard part internals, minus the electronic control of the phaser.

the most overstated verdict is REGULAR SERVICE with RECOMMENDED OILS....yet we have had numerous model years fail within the first oil change. My company runs only GM vehicles and we have nearly hundreds on the roads all over the country
 
I do 5000 mile oil changes or shorter if going on a long trip close to that time. I have my own shop so I'm pretty obsesive when it comes to my vehicles.
 
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