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P3400 code on my 11 silverado
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CF Beginner
Joined: Mar 2021
Posts: 6
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From: Alberta
P3400 code on my 11 silverado
So I’ve changed all 8 afm lifters and a new valve lifter oil manifold , new oil pressure switch , plugs and wires . But not my cylinder 7 has heavy rocker noise and the p3400 code is getting thrown. Any ideas guys ?
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