Engine VIN code Y. Avalanche, Sierra 1500, Silverado 1500, Suburban 1500, Yukon XL 1500. MLS head gaskets. With new head bolts. Engines with rectangular intake ports.
6.0L / 364 OHV V8 16V LS Series Vortec GM 4.000" Bore 99-20
CHEVROLET,
GMC,
CADILLAC,
GM, CHEVROLET
6.2L / 376 OHV V8 16V LS Series Vortec Natural Asp. 4.065" Bore 07-15
GM, CHEVROLET
6.2L / 376 OHV V8 16V LS Series Vortec Natural Asp. 4.065" Bore 07-15
CADILLAC,
CHEVROLET,
GMC
GM364T-CH | 6.0L / 364 OHV V8 16V LS Series Vortec GM 4.000" Bore 99-20
CADILLAC,
CHEVROLET,
GMC
GM376T-CH | 6.2L / 376 OHV V8 16V LS Series Vortec Natural Asp. 4.065" Bore 07-15
CADILLAC,
CHEVROLET,
GMC
