SIERRA 2500 PICKUP 05 6.6L. SIERRA 2500 PICKUP 04 6.6L, VIN 2 (8th digit, opt LLY). SIERRA 3500 PICKUP 05 6.6L. SIERRA 3500 PICKUP 04 6.6L, VIN 2 (8th digit, opt LLY). SILVERADO 2500 PICKUP 05 6.6L. SILVERADO 2500 PICKUP 04 6.6L, VIN 2 (8th digit, opt LLY).
