Question about GMC G3500

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What does the eng 1 fuse go to - G3500 GMC Cars & Trucks

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  • rcummings3 Aug 21, 2010

    that helped a lot now i know where to look for the problem

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  • GMC Master
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Hi.

If you are talking about the fuse marked as ENG I , that should be a 20 Amps fuse, and it is connected to the MAF sensor, O2 sensors, crank sensor and Evap system valves it also connects to PCM.

If fuse keeps blowing, check all the wiring , starting from the O2 sensors. If the problem is happening only occasionally shorts can also be caused by water on exposed contacts, particuarly with the O2 sensors, whose wiring is placed in exposed location on the exhaust system.

Posted on Aug 21, 2010

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