Alright... I called the dealer again today and asked if all #1, 2 and 3 were done together, whether it would make any difference in terms of what I was quoted yesterday. Well, apparently there is no "labor overlap" between all three items. Yeah right!

So, I will replace PCV valve myself.

Apparently as part of the decarb service, they hook "something" to the fuel line and flash all the carbons, as well as manually clean the necessary components. It is not just pouring a gas treatment to the tank Should I still go for this for $174? EGR cleaning and decarb service together will cost me $260. I DO want to keep my truck for another 78K (heck until it dies on me). If this will be something beneficial in the long run, I wont hesitate doing it...

Any suggestions would be appreciated. Thanks!!!