Saw this site on another forum
http://repairpal.com/chevrolet-tahoe-1999 put in your info and it said:About this Repair: Fuel Pump Replacement for your 1998 Chevrolet Tahoe
What to watch out for
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A clogged fuel filter or problems with the electrical system powering the fuel pump can result in symptoms similar to a failed fuel pump. Have the shop verify that the pump is the problem.
* The parts for the Fuel Pump Replacement service on your Chevrolet Tahoe tend to have a wide range in prices, even for parts of similar quality. You may benefit from checking around to compare the prices at different shops.
Recommendations
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The fuel filter should always be replaced with the fuel pump.
Why this happens
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A failing fuel pump will not create enough pressure in the fuel system, potentially resulting in a loss of engine power.
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Fuel pumps require replacement if they leak or begin making too much noise, which is a sign of malfunction.