If they are platinum plugs, should be every 95,000 to 100,000 miles.
Should change the filter at least 2 times a year. Remeber the fuel is always being pasted thru the filter. But if you get to it once a year that is better then not doing it.
Should only be required at 100,000 miles
weekly
AS dirty as todays gas is you should change it every other oil change and that will also make the electric fuel pump LAST LONGER. Another answer: I recommend you change it every 36,000 miles.
Passwords should be changed every month.
According to my dealer, it should be changed at 150,000 km.
my '04 Chevy owners manual states 100k mi
When it is dirty.
When it is dirty.
When its old
weekly