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Hard starting 2011 GMC Sierra 1500 5.3
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Question
MajTomRet
I added a K&N 63-3070 Performance Air Intake and a Throttle Body Spacer to my truck and now it starts REAL hard but up till now always starts... This happens ONLY on cold engine starts after the truck is warmed up it starts just fine...? The performance is great response and power are what I was looking for and it has it...
Any Ideas as to why it is a cold hard starter now?
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