Having problems with your 1998 GMC Sierra ?
I have a gmc 3500 deisel,it starts and run great but out of no were it just shuts off.at stop ligyt or highway,doesn't matter.wait ten min. and it will start again,run for fifteen min. and die again.i changed the fuel filter and no codes are tripped
Check the camshaft and crankshaft sensors. If they get faulty (typical in GM cars) the PCM would shut down the engine. Happened the same problem to me and solved it by changing the crankshaft sensor.
Repair Help & Product Troubleshooting for 1998 GMC Sierra
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