Simply unscrew the air intake hose from the resonator box. Then look on all 4 sides of the resonator for some bolts. Use a ratchet with an extension to unscrew the bolts, and it pops right off. Did it on my trailblazer to change thee spark plugs (located underneath the resonator box). Hope this helps!
The Air Intake Resonator box on a 2004 Chevy Trailblazer is located in the middle of the engine; It's marked with the "Vortec 4200" symbol on the top of it and is made of black ABS plastic.
The resonator box is not meant to be opened. It is fused together as there are no serviceable parts inside of it.
There are 2 bolts on the left side of the resonator.
in the trunk
Big plastic thing on top of the engine that says 6.6 air intake resonator
A resonator.
resonator
A resonator.
They call it a muffler. Or Catalyst. Or resonator.
It is on the intake air tube facing the firewall close to where the tube joins the Vortec 4200 resonator box. All the answers are at our enthusiasts website ........ www.trailvoy.com
Underneath the resonator box (the black plastic box right before the throttle body).Once the resonator box is removed the spark plugs are located underneath the small rectangular aluminum heat sinks. Remove the long bolt and pull the entire assembly up and out.