the check engine light, flashes on and off

2015 CHEVROLET SILVERADO
132,234 MILES • 5.3L • V8 • 2WD • AUTOMATIC
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SILVERADODUDE
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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.
Feb 13, 2021 at 8:36 PM
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ASEMASTER6371
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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.
Feb 14, 2021 at 6:11 AM