Question about 1998 GMC Sierra

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1996 GMC K1500 Pickup Starting Problem

This truck has an OBDII computer on board. When i turn the key to the run position the fuel pump used to come on a build pressure in the line for a few seconds. It has stopped doing this. When i turn the key to the start position it turns over and grinds and grinds, no fuel. I have replaced the fuel pump, oil pressure/fuel pressure switch, and checked the fuel pump relay. I have also scanned the onboard computer and it has no trouble codes. Any help would be appreciated. Thanks in advance for anyones help. 98 gmc 5.7 fuel gauge crazy works wen in gear, trouble starting ocasionaly have to pour fuel in t.b., drive on highway @ speed and once back at idle will die, can feel power loss and regain in 2-3 min incrimints on highway ???

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I would try a fuel filter first. the fuel gauge going crazy is most likely the sender they go bad and eventually stop working. the bummer is you have to replace the fuel module. these aftermarket are about 200 bucks. the module comes with the pump and sender which is the next part you want to look at. gm has some issues with the harness to the fuel pump externaly. it actualy will melt and start to lose conection. i would check this by visualy inspecting the plug on top of the tank. unplug it and take a look. if it is at all disscolored replace the pump (module). the new pump comes with a replacement harness (make sure its in the box)hope this helps and good luck

Posted on Feb 04, 2009

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