2005 Pontiac Montana SV6 - Rubbing sound

it seems to ecelerate high and there is a rubbing sound coming fromthe back passenger side when pressing on the gas peddle

Might be a bad bearing or a brake issue. Take it to a local shop for diagnosis and repair. Have you been in an accident?

What does that mean?
Are you trying to tell us that the engine is running at higher than normal RPMs when you accelerate?

As Mr. Sanders noted, this could be indicative of a bearing or brake problem.
There could well be more than one issue that a qualified mechanic needs to look at.

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