Question about 1991 GMC Sierra

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1991 GMC SIERRA Shaking in the drivetrain

I recently had the fuel pump, fuel regulator and the fuel line replaced by a shop. Now, when I reach speeds of 55 mph, the truck begins to shake rather violently. It only lasts for a couple of seconds and will happen again and again as I accelerate beyond 55 mph. It seems to be ON the engine, not IN the engine, if this helps any. Other than this, the truck will operate great throughout acceleration and at a constant rate of speed, as long as I stay under 50 - 55 mph.

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  • grandhustlep Feb 04, 2009

    a violent shake when i accelerate but stop when i get up two fifty miles an hour also noticing a slight chocking in da tail pipe and the car hesistant to crank

  • Anonymous Mar 28, 2014

    may have bought bad gas, check engine light comes on stays on



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Crankshaft balacer going bad,can cause the crank to break if left unchecked

Posted on Jul 12, 2008


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