2008 sts 3.6 l di{ reduced engine power}

My advice is to pamper the V6. Take no chances. If your insurance doesn't have towing, add it.

Get a good code reader if you go that route. These cars have body & suspension codes as well as engine. I'd just have it flat-bedded to a delaer. Once at a dealer, they can validate the valve timing and the chain/guide wear. If that passes muster and your oil rings are OK, you're cool.

Enjoy the ride!

I'd be tempted to just put in a fuel pump, filter & sensor and see what happens.

I don't doubt the fuel lines & injectors are dirty but you could say that about lot of cars that run just fine.

One thing to keep in mind... Dealer Service Departments are evaluated on many factors but one of those is repairing a complaint with just one visit. (Just like hospitals are discouraged from re-admitting patients.) Cost may secondary to them.

If they replace all the things listed, what's left to be defectrive?

Good luck!