The Brian Tooley Racing truck camshafts are an excellent choice for GM trucks and SUVs equipped with 4.8L, 5.3L engines. The camshafts are designed to increase power without sacrificing low-end torque and are great choice for heavier vehicles such as: Avalanche, Escalade, Sierra, Silverado, Suburban, Tahoe, Trailblazer, and Yukon.