Application Compatible for Chevrolet Trailblazer 2WD 4WD 2002-2009 Compatible for GMC Envoy 2WD 4WD 2002-2009 Will require longer shocks for suspension For Trailblazer EXT / Envoy XL model with Rear Lift more than 1\"Regular Trailblazer or Envoy model Can accommodate higher rear lifts. Specification Lift Height: 3\" Front, 3\" Rear Package Include: 2x 3\" Front Strut Spacers 2x 3\" Rear Lift Spacers Hardware Feature Can work with stock shocks.No spring compressor needed.Allows clearance for up to 32\" tires Notice Professiona installaiton is recommened,No Instruction included. Please do not hesitate to contact us for anything we can help.