I recently did a brake rebuild on my 2003 Chevy Trailblazer which involved removing the rear axle to replace a rusted brake backplate (here the Dorman equivalent used). Now there is actually no brake shoe adjustment and there is some adjustment of the parking brake lever in the car (see video on You Tube). I don't know why but I had major problems with the e-brake after changing the baseplate and everything else for the first time except for the e-brake pad. In fact there was no wear and tear on the old unit but I replaced the same with this brand new part and everything is fine. The rotor MUST NOT fit snugly against the e-brake shoe as this can prevent the axle from moving freely as it pulls towards the e-brake shoe. The rotor should "slide" over the shoe with little resistance when seated and should come loose easily when tightened. Check the e-brake when the rear wheels are off the ground (properly secure the vehicle!) and make sure the wheels are tight and not moving when the e-brake is engaged. This new shoe, combined with all the other replaced parts, should be the ticket.