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The check engine light, flashes on and off

Tiny
SILVERADODUDE
  • MEMBER
  • 2015 CHEVROLET SILVERADO
  • 5.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 132,234 MILES
Hesitation upon acceleration, and a lot of white smoke comes from the exhaust pipe. Tried a tune up, got the same problem; and the check engine light, flashes on and off. It never had a problem starting, first time, everytime, just the hesitation and smoke.
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Saturday, February 13th, 2021 AT 8:36 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

White smoke is an indication of a failing head gasket. You are burning coolant in the combustion chamber but to be sure we should get the codes. This video shows the job being done on a similar car but the process is the same.

https://youtu.be/v0ayZE5kq1Y

and

https://www.2carpros.com/articles/head-gasket-blown-test

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

The hesitation may also be th result.of the head gasket. Please run down these guides and report back.
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Sunday, February 14th, 2021 AT 6:11 AM

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