Won't start when temp under 10 degrees?

Tiny
ELI MEISTER
  • MEMBER
  • 2002 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 175,000 MILES
Truck won't start when temp under 10 degrees. If you don't start below 10 degrees have you tried a block heater! The engine cranks over just fine. Doesn't fire at all. And we haven't tried a block heater. We bought this truck new and each winter it gets below 10 it won't start. We took it to the local chevy dealer he wasn't any help. We put a new fuel pump in it last year. Could it be the computer?
Monday, December 13th, 2010 AT 2:03 PM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

It sounds like an issue with a sensor.
It could be the crank position sensor, as many times that sensor can change behavior with temperature.
Are you getting a check engine light?
If so what are the codes?
Typically when there is an issue with a sensor it will trigger the engine light.

https://youtu.be/vMwTzURWXmk

Here are few articles you might find helpful:

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

I have attached the replacement procedure for your reference.

Please let me know of any questions.

Thank you.
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Monday, August 9th, 2021 AT 7:51 AM

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