Avalanche 4WD V8-5.3L (2011)
Flex Plate: Specifications
Tighten the flywheel bolts.
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Tighten the bolts (1-6) a first pass in sequence to 20 Nm (15 lb ft).
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Tighten the bolts (1-6) a second pass in sequence to 50 Nm (37 lb ft).
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Tighten the bolts (1-6) a final pass in sequence to 100 Nm (74 lb ft).