vortec 6.2L big trouble

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Cheyhigashiguchi
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Joined: Mon Aug 10, 2020 6:31 am
cars: Nissan Altima 2015

vortec 6.2L big trouble

Post by Cheyhigashiguchi »

Last month the check engine light on my sierra came on, I took the truck to a mechanic. He ran a diagnostic check which showed that the knock sensors were bad. He reset the light and it stayed off for about 50 miles but came back on after hard acceleration.
I replaced both knock sensors and the harness. I went to a shop and a mechanic reset the check engine light.
I drove the truck for about 60 miles and the light stayed off. The light came on again after hard acceleration. I bought an auto scanner, it says that transmission check is incomplete, check the harness.
I believe that the powertrain control module may be bad.
I have checked the wiring and connectors, everything seems good. Guys, I really need help. What am I to do to finally reset check engine light on gmc sierra without further incidents?
Production year 2011, 1500 Denali AWD, Vortec 6.2L V8
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