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Cranks but will not start

Tiny
TERRI GASKILL
  • MEMBER
  • 2005 GMC SIERRA
  • 2WD
  • AUTOMATIC
  • 241,000 MILES
Just had the harmonic balancer replaced. Truck will crank but will not start.
Wednesday, July 3rd, 2019 AT 7:51 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,188 POSTS
Welcome to 2CarPros.

If it ran prior to the part replacement and this is the 4.3L V6, I suspect either the crankshaft position sensor was left disconnected or damaged when the work was done.

Take a look at pic 1 to locate the sensor in question. I circled it for you. Check to make sure it is fully connected and nothing was damaged.

Next, was anything other done to the vehicle? If you could, let me know the engine size.

Take care and let me know.

Joe
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Wednesday, July 3rd, 2019 AT 8:42 PM
Tiny
TERRI GASKILL
  • MEMBER
  • 3 POSTS
The truck is still at the garage and yes was running before the work was done, they don't know what's wrong with it. Last I heard from them they were checking the electrical, but will inform them tomorrow about the sensor.
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Wednesday, July 3rd, 2019 AT 8:47 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,188 POSTS
Welcome back:

Is it the V6?

Joe
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Wednesday, July 3rd, 2019 AT 9:45 PM
Tiny
TERRI GASKILL
  • MEMBER
  • 3 POSTS
I want to say yes, but really not sure. Will find out tomorrow.
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Wednesday, July 3rd, 2019 AT 9:52 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,188 POSTS
Welcome back:

If it is, then what I mentioned is my first suspect. Let me know and Happy 4th.

Joe
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Thursday, July 4th, 2019 AT 4:43 PM

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