i have a 97 blazer s10 4door 4x4, the truck starts fine and runs fine, everytime i shut of the ignition the ecm fuze blows. the truck wont start unless i replace it, i tried 10,20,25 fuzes and they all blow, it recalls for a 20 i believe but still blows? could the sending unit be going bad? maybe a bad ground wire?

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my ecm fuze blows everytime i shut off the truck and need to replace it everytime b4 i turn the truck back on. what coud this be?n fuel pump going bad? or bad ground? 97 s10 blazer 4x4 4door

 

It could be something as simple as a shorted wire. I say simple because it is simple to fix, but plenty difficult to locate!