Chevrolet Colorado & GMC Canyon Forum banner

ignition coils

  1. I4/I5 Engine & Drivetrain
    My 2004 colorado 5 cyl needs new plugs and with 175K and the codes I got on a long trip, also know the coils need to be replaced as well. While I'm at it, will replace the value cover too as I'm getting some leakage into the coil/plug wells. Gasket set is no biggie. However there are various...