No starter operation?

2005 CHEVROLET 2500
138,000 MILES • 6.0L • V8 • 4WD • AUTOMATIC
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DMACKENR
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My truck HD2500, crew cab will not start sometimes. I can drive somewhere come back out and it won't turn over. Makes a sound like the fuel pump or something is engaging. The PRNDL will light up and the battery light will light up. Nothing else happens. No other lights on the dash. No gauge movement. Interior lights and radio work. Once it gets towed to the shop. It fires right up. Might work for two weeks and then randomly won't start. The last time I was in a drive through and I opened the car door and it shut off. Tried to start it and same behavior. Once it got to the shop no problem.
Jan 17, 2019 at 9:54 AM
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PATENTED_REPAIR_PRO
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This sounds like either an loose battery cable or a starter relay that is beginning to fail.
I would check both ends of both battery cables by trying real hard to twist the connections and if any move at all, it's too loose and then if all tight, try a new starter relay.
It is located in the underhood fuse block shown here.
Image (Click to enlarge)
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Jan 17, 2019 at 11:06 AM
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DMACKENR
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Thanks. Replaced battery and negative battery cables when issue first started. Will check into the starter relay next.
Jan 17, 2019 at 11:34 AM
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PATENTED_REPAIR_PRO
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Okay, please keep us posted.
Jan 17, 2019 at 11:56 AM