Question about 1999 GMC Jimmy

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My 1999 gmc jimmy will not start. it would loose power while driving and slow down whenever im going 60 or above at first. I got the catlac converter fixed but the problem didnt go away. i gave it a tune up and got transmission serviced. Then the radiator went out so i got that fixed. Last i tried a new fuel filter. it try to crank but no luck. What do i do from here ive put too much work into it to let it go

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Your Fuel Pump may need replaced.

Posted on Oct 19, 2010

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My full size gmc jimmy with 305 is very sluggish when driving on highway i start to go up a hill it slows down to 45 mph or lower what could be causing this


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1 Answer

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Jan 16, 2009 | 1999 GMC Jimmy

1 Answer

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That's normal in most cases, depending how low it goes. 40 psi approx when driving, 20 psi approx when idling ?

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