For Chevrolet Blazer Base, LS, LT, Trailblazer 4.3L V6 1999. For Chevrolet Blazer LS, 4.3L V6 2002. For GMC Jimmy Envoy, SL, SLE, SLS, SLT 4.3L V6 1999. Seamless fit, unit is identical in appearance to the factory module, retaining original look and feel.