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I have a 2004 trailblazer a few weeks ago it started making a rattling noise then every time I went somewhere I could smell what smells like locked up breaks a few days later while I was driving it the reduced engine power light came on and now the it will barely do 5mph with pedal to floor pedal has no pressure. I thought it might be the throttle plate so I cleaned it but it did not help I have also unhooked the battery and pulled fuses to reset it still nothing. If I let it sit over night in the morning it runs normal besides the rattling noise long enough to make it around the block once then the light comes back on and it will on go 5mph. As it is doing this I have no way to get it anywhere to get it tested for codes.

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SOUNDS LIKE A POSSIBLE MASSIVE EXHAUST RESTRICTION...ESPECIALLY WITH THE "RATTLING" NOISE

Posted on Jul 21, 2013

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Its possible one of the brake calipers is not releasing.
You may need to check each wheel off the ground to see if the brake is releasing after you push on the pedal.

Posted on Jul 21, 2013

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