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Random crank but no start

Tiny
BGREENARD2
  • MEMBER
  • 2005 CHEVROLET SILVERADO
  • 6.0L
  • V8
  • 4WD
  • AUTOMATIC
  • 196,000 MILES
I have the truck listed above (SS). I have been plaque with a random crank but no start. If the problem happens, it always starts on the second try. I have replaced the fuel pump, ignition switch (in the column), and key switch. Any ideas?
Tuesday, August 10th, 2021 AT 9:52 AM

5 Replies

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

Have you checked the crank position sensor?
It almost sounds like an issue with the crank sensor.
Many times a faulty crank sensor will make it difficult to start the engine.
It can also create intermittent starting issue. The crank sensor does require programing for these trucks.

https://www.2carpros.com/articles/how-a-crank-shaft-angle-sensor-works
https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

Is your check engine light on?
Let me know your thoughts.

Thank you.
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Tuesday, August 10th, 2021 AT 10:23 AM
Tiny
BGREENARD2
  • MEMBER
  • 3 POSTS
I have no codes except for Airbag. Excellent suggestion, I have seen them became faulty on other GM vehicles but didn't consider on my Silverado. I will look into the crank sensor. I appreciate the speedy response.
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Tuesday, August 10th, 2021 AT 11:13 AM
Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
You're welcome.
Keep me posted.
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Tuesday, August 10th, 2021 AT 11:31 AM
Tiny
BGREENARD2
  • MEMBER
  • 3 POSTS
Found out the crank sensor has recently been changed recently. Will check the fuse box. Feels like a sticky fuse. Spit balling now.
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Wednesday, August 11th, 2021 AT 6:00 PM
Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Is it throwing any codes?
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Wednesday, August 11th, 2021 AT 6:15 PM

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