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My 2012 Chevy Suburban 1500 with a 5.3 engine will not crank…

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my 2012 Chevy Suburban 1500...
my 2012 Chevy Suburban 1500 with a 5.3 engine will not crank on the first try. Can you help?
Submitted: 2 years ago.Category: Chevy
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Customer reply replied 2 years ago
cranks perfect first time after sitting overnight. after that it will never start on the first try. cranks perfect on second try. I replaced fuel pump. still doing the same thing.
Answered in 1 hour by:
2/18/2016
Chevy Mechanic: cloe0626, Auto Mechanic replied 2 years ago
cloe0626
cloe0626, Auto Mechanic
Category: Chevy
Satisfied Customers: 824
Experience: was a mechanic in the army for four years and have been working at a dealer ship the past five years
Verified

sounds like you have a dead spot in your starter when you crank it the first time it brakes it loose if you need anything else please let me know be sure to rate my service when you get the chance

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Customer reply replied 2 years ago
needs new starter?
Chevy Mechanic: cloe0626, Auto Mechanic replied 2 years ago

yes

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Customer reply replied 2 years ago
starter didn't fix it. Maybe a sensor?
Chevy Mechanic: cloe0626, Auto Mechanic replied 2 years ago

possible its the crankshaft positioning sensor

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Customer reply replied 2 years ago
is crankshaft positioning sensor and camshaft positioning sensor the same thing? I replaced the camshaft sensor and it didn't fix it....
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