3.42 rear axle ratio

  • On 4x4 WT, LS and LT models, standard with 4.3L EcoTec3 V6 engine; available with 5.3L EcoTec3 V8 engine
  • On 1LZ models, available with 5.3L EcoTec3 V8 engine; included with Max Trailering Package on Crew Cab models; included with Max Trailering Package on Double Cab models when equipped with available 6.2L EcoTec3 V8 engine; required with 5.3L EcoTec3 V8 engine with certain available wheels (see your Dealer for details)
  • On 2LZ models, required with  5.3L EcoTec3 V8 engine