Have 06 ext w 75000 imles besides iol change which i do every 3-4000 miles what other maint should be done ???

Replace belt about every 75000 miles.. and yes replace water pump and tensioner... for its a timing belt driven waterpump

Any brand of Synthetic.

10W-30 if over 75000 miles. 5w-30 if under 75000 miles.

If its not giving any problems I don't see it giving any for another 5000 miles. Carry on!

it sounds like it just needs a service,,its done 75000,,so its duw one

If the car has been kept up you shound not have any worries. I can say that you should be ok for another 5000 miles or your next oil change, Just remember it's PREVENTIVE manintence and it's important to keep the car in top shape. hope this helps.

You don't need a service of any kind at this mileage, u do need to have this diagnosed for worn front end parts and a full electronic engine control diagnostic, but i will say this the fuel and air filter needs to be changed every 30,000 miles, it this hasn't been done do so, also the transmission needs a fluid and filter change every 60,000 miles, check tire pressure once a month, all these maintainence items affect performance.

COURTESY:EMMISIONWIZ(A fellow senior expert)

check manual, if you don't have one buy a good one if you plan on doing it yourself,  but it's probably time

has the trans ever been serviced? it should have the fluid and filter changed every 60,000 miles, this may help if it hasn't been done, also check for clutch mud in the pan of the trans..

It is the blower motor resistor. I had the same problem on my 05 ext and now it just happened on my 06 ext. It is located behind the glove box, very easy to change.

At 60,000 you should have all the major things done if you haven't already:
oil change(every 3000)
air filter change(every 15,000)
coolant flush(every 30,000)
spark plugs and wires(every 30,000)
transmission fluid & filter change(every 30,000)
brakes (as needed)
PCV valve (every 20,000)

You can wait until about 75000 miles to do your timing belt.

Hope this helps