ok doing alittle homework just wondering do these matter much i know what they do but does anyone know if its worth changing them. how long till i should change them. I know EGR Valve helps Improve performance and mileage. so is it worth the change thanks for your time

 

Changing the pcv-yes.
Raplacing the EGR valve for maintenance sake-no. Most people get rid of the EGR system all together for a cleaner looking engine bay. No set backs or problems from doing this.

 

how often would you change the pcv valve

 

well if you have an 02 5.3 you shouldn't have an egr...right??

 

i dont think it does so yea i was just wondering. thanks

 

yeah i think they eliminate the egr in the 02 and up.

 

02 models the egr system was deleted. As for the PCV valve, it's so cheap not to change it. I would say at least once a year.

 

yea i looked for the egr its not there every year huh alight well thanks for the info

 

My 02 6.0L GMC has the EGR and where is the PCV valve on this thing? I can't seem to locate it. Thanks

 

PCV valve is at the rear of the driver's side valve cover, with a rubber hose attached to it.