Question about 2003 GMC Sierra 1500

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When I try to start my 03 sierra it struggles to fire up, like it is starving for gas, on my second attempt it fires up like normal. What causes this?

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This cuold be fuel punp or more commonly fuel filter related. It happens because the manifold pressure is not high enough to make the fuel injectors work properly. Try turning the key to the on possition for 30 seconds before cranking it over. If this helps the problem change the fuel filter 1st as they are cheap and easy to change. If after changing the filter this still happens chances are the fuel pump is going bad
replacing it is more complicated as it is in the gas tank its self if you wish to try ,consult a chiltons manual for detailed instructions they are available at most auto parts stores the manual will allso show how to change the fuel filter with detailed instructions
and diagrams. Something I can't do in this forum
HOPE THIS HELPS
PLEASE LEAVE FEEDBACK

Posted on Nov 19, 2009

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Have a look at the distributer cap and rotor button,if they have carbon build up or corrosion then replace them.Also listen for the fuel pump to stop before cranking the engine,if it starts better when you do this try a new fuel filter.

Posted on Nov 19, 2009

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