Question about 1999 GMC Sierra 3500
For the ECM 1 fuse to open you obviously have a short to ground , start with the injector disconnected and see if ECM 1 fuse still blows.If it does disconnect crank sensor, also inspect wires for the injectors or any rub through wires here is a diagram
Posted on Sep 09, 2011
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Posted on Jan 02, 2017
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