HI- I have a 2002 Envoy, 76k miles. I recently took it in to the
dealer with a 'service engine soon' light. No big deal. But they
recommended, based on last service and mileage, the following:
-fuel filter - which I think it does need
-fuel injection and throttle body cleaning **
this is the questionable
Now, since I don't have any lag in performance or heavy idles, how
would I ever know if I need this? I don't drive it hard and maybe fill
it up every 2 weeks.
This same service was done at 48k since it had never been done before
and my father, who owned it previously, put 40k on it in 1 year!!
I'm thinking we could do this at 100k; but how do you know, especially
on the throttle body, without actually looking at it? I can find
nothing in the owner's manual about cleaning the fuel injection-it
doesn't even list a throttle body.