| [GMCnet] Electronic Fuel Pump Chatter (Mark Kasiewicz) [message #183368] |
Thu, 06 September 2012 13:48  |
mmmm ka
Messages: 45
Registered: May 2012
Karma:
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Working on my GMC and I hear a chatter that I trace to a Napa electronic Fuel Pump mounted amidships on the driver's side frame. Engine is off. No key in ignition. It does turn off when I disconnect both batteries. I have never heard this noise before.
Is the some reason this should be coming on without the engine or generator running ?
Does anyone know what the purpose of this pump is ?
There are a lot of unmarked switches installed by the PO on the dash. Would there be a reason to have a aux pump activated by a switch on the dash ?
Thanks for any ideas !
Mark Kasiewicz and Dawn Koepp
77 Kingsley (Orange shag carpet and all)
Gus da Bus
Eau Claire, WI
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