changing rear plugs on a 07 chev uplander on 2007 Chevrolet Uplander

over 100k plug need to be chang

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2 answers
you need too go directly under the vans and it hard too see but essy to tuch with your hand ,i did it by my self
Your plugs should be changed at about 100,000 miles.
However, are you experiencing a specific performance problem? Don't just automatically replace your plugs hoping that it will correct a problem. Usually modern vehicles run the same after a "tune-up" as before the tune-up. If you don't like the way it is running, starting, or accelerating, you may have a specific problem that needs to be diagnosed and corrected.
But, if it runs great and you just want to keep it running great, 100,000 miles is a great time to change your spark plugs!!