won't start when temp under 10 degrees?

2002 CHEVROLET SILVERADO

175,000 MILES • V8 • 4WD • AUTOMATIC

ELI MEISTER

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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?

Dec 13, 2010 at 2:03 PM

SQM

CAR REPAIR CONTRIBUTOR
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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Aug 9, 2021 at 7:51 AM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.