15923277 : GM OEM. The engine types may include 6.0L 5967CC 364Cu. V8 CNG OHV Naturally Aspirated,6.0L 5967CC 364Cu. V8 FLEX OHV Naturally Aspirated,6.0L 5967CC 364Cu. V8 GAS OHV Naturally Aspirated,6.6L 6571CC 401Cu.
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