Sierra 3500 Denali 4WD V8-6.0L (2011)
12. Remove the 3-4 accumulator piston seal (45) from the 3-4 accumulator piston (44).
13. Inspect the 3-4 accumulator piston for the following defects:
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Porosity
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Cracks
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Scoring
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Nicks and scratches
Installation Procedure
1. Install a new 3-4 accumulator piston seal (45) to the 3-4 accumulator piston (44).
