Question about 2001 GMC W3500

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02 W3500 BATTERY LIGHT IS ON

I HAVE A W3500 WHICH IS A ISUZU THE BATTERY LIGHT AND BRAKE LIGHT WILL COME ON ..WHEN IT DOES THIS THE BLOWER MOTOR STOPS WORKING AND ALT STOPS CHARGING IT I CHANGED THE RELAY IN THE DASH FIXED FOR A WHILE BUT THEN BACK ON AGAIN THANKS

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 2000 GMC W3500 diesel (ISUZU NPR),cranks but no

fuel line pick-up broken in the fuel tank

Posted on Feb 14, 2011

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afarri
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SOURCE: I have a 2003 GMC

Hello and welcome to FixYa!
Regarding the no power to the glow plugs, it surely is a faulty relay to the heater. You will need to have it replaced if it's just the case. But the speedo and fuel gauge don't work as well right? It's either you still have blown fuses or the PCM (powertrain control module) is faulty. The PCM has connectivity on all electrical current that runs inside the car that when it's faulty something will surely fail. You may need a PCM replacement if that's the case.
Please have it checked personally by a reputable mechanic to resolve the issue.
Hope this helps and thank you for using FixYa! Have a good one!

Posted on Aug 12, 2011

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