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Plug wires randomly popping off...

ten20life

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ten20life New Member

ten20life

Posted
Posted

#5 plug wire came off my 2014 Silverado beginning of March. Dealership replaced wire, thought problem was solved. Two days ago the #1 plug popped off driving down the highway.... Took it to dealership and the parts manager shook his head when service manager asked him to order entire new set of wires... Parts manager insisted someone must have been messing with/tampering with it. Seriously? So I returned to dealer this morning and service manager says they just released service bulletin about the plug wires. Anyone else have this happen?

 

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2016 Sierra Owner Senior Enthusiast

2016 Sierra Owner

Posted
Posted

#5 plug wire came off my 2014 Silverado beginning of March. Dealership replaced wire, thought problem was solved. Two days ago the #1 plug popped off driving down the highway.... Took it to dealership and the parts manager shook his head when service manager asked him to order entire new set of wires... Parts manager insisted someone must have been messing with/tampering with it. Seriously? So I returned to dealer this morning and service manager says they just released service bulletin about the plug wires. Anyone else have this happen?

 

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I have read posts where this has happened to a few people. Maybe they will chime in. What does the bulletin specifically say or do you know?

ten20life New Member

ten20life

Posted
  • Author
Posted

No he didn't specify exactly, nor did I see it. Tried searching net. Tbarn said it was addressed in October? They replaced all my wires, so I'm content.

 

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tbarn Senior Enthusiast

tbarn

Posted
Posted

Bulletin released in October says if you find a plug wire off, attempt to reconnect it. If it clicks all is good. No click, replace the wire.

  • 1 year later...
COP TZR Enthusiast

COP TZR

Posted
Posted

Just had this happen, over railroad tracks, spark plug wire came off at coil on 3rd cyl back passenger side, misfire, engine light and trac light. Good to know there is a bulletin...I will be telling them to give me full set of replacement wires next week.

 

Called yesterday, they said 35 years, never heard of that, specifically on 2014-2015. After telling them the only option to order new kit, they agreed to check parts dept. and call back. Have message saying they found service bulletin to check clip on wire, but have order full wire kit to be in next week.

TJay74 Senior Enthusiast

TJay74

Posted
Posted

As said, check the wire yourself to save some time. Remove it and try to put it back on the plug. If you feel the click it is fine. My guess is someone at the engine plant isn't putting the wires on correctly.

ghgmi Enthusiast

ghgmi

Posted
Posted

As said, check the wire yourself to save some time. Remove it and try to put it back on the plug. If you feel the click it is fine. My guess is someone at the engine plant isn't putting the wires on correctly.

But if you don't feel the click it is not fine. How is that caused during assembly? It must be a defect in the wire end.

TJay74 Senior Enthusiast

TJay74

Posted
Posted

Correct, but before you tie up the truck for a day at the dealer.

COP TZR Enthusiast

COP TZR

Posted
Posted

New wire set has arrived, dealer says they must install (1-1.5hr) for proper paperwork, that's fine...another dept. called right after that and said Onstar update hardware is in, so good time to do both while there.

  • 2 months later...
twankster New Member

twankster

Posted
Posted

Is there a TSB for this problem? I've looked around and could only find people having the same issue, but no specific TSB cited. My dealership is playing dumb with it (maybe not playing...). Plug wire coming off twice so far in the past few months. Sure, I can plug it back in but I shouldn't have to!

 

2014 Sierra 4.3 w/ 15,000

 

 

Thanks

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