Question about 1999 GMC Jimmy

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1999 GMC Jimmy won't start.

My Jimmy starts one day then won't start other days.

I cannot hear the Fuel Pump charge the system when I turn the key.

I have found the Fuel Pump fuse but I cannot find out how to check it if it is good or bad.

The next step would be to check the Fuel Pump Relay.

Is there a way that I could check and change my Fuel Pump Relay easily without going to the garage?

Please help!!

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  • cpep003 Nov 07, 2008

    My 1999 GMC Jimmy wont start sometimes. it powers up at times but the engine wont turn over. Then a few days later it will start. ????????????

  • Anonymous Nov 28, 2008

    turn key fuel pum,p cant be heard,

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  • GMC Master
  • 21,981 Answers

Firstly where is fuel pump relay as i have never seen a GMC jimmy sorry about that but have you ever seen a foden ?? well the first thing is to check the fuse,if fuse is ok which can be checked by looking at it as its transparent or a piece of wire with a light bulb .across the battery.to find the relay is easy if you dont know where it is,When this piece of americana decides to work just turn ignition on and listen for the click of relay ,then when it doesnt start listen for click again or rather an absence of a click,sounds more like a dodgy pump in the tank or the connections going to it.when it wont start try thumping the fuel tank with the ignition on and if it is a sticky pump you might hear it start then at least you will know where the fault is.Another fault that i have come across with relays is that where the relay is passing a heavy load then its possibe for the contacts to burn inside the relay.When this happens then if it is possible to seperate the relay cover and clean the contacts with a points file (remember them ) or a piece of fine emery paper if the cover breaks taking it apart then use a bit of black insulating tape to repair the cover.Thats assuming the pump is in the tank and not bolted to the chassis near the fuel tank but that design with external pump i havent seen on a europeon car for nearly 20yrs .

Posted on Nov 05, 2008

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