The exhaust pipes in automobileexhaust systems are designed as acoustic resonators that work with the muffler to reduce noise, by making sound waves "cancel each other out"[1]. The "exhaust note" is an important feature for many vehicle owners, so both the original manufacturers and the after-market suppliers use the resonator to enhance the sound. In 'tuned exhaust' systems designed for performance the resonance of the exhaust pipes is also used to 'pull' the combustion products out of the combustion chamber quicker. (From Wikipedia)
The resonator box is not meant to be opened. It is fused together as there are no serviceable parts inside of it.
in the trunk
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.
They call it a muffler. Or Catalyst. Or resonator.
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.
Check out gmtnation.com, There are lots of helpful people there, lots of How-To Tutorials for the Trailblazer.
The Spark Plugs are located under the resonator box in the center of the engine (its the rectangular black box on top of the engine)
Resonator - album - was created on 2006-04-04.
Under the resonator box on the top of the motor. They are under the six individual coil packs.
Some of the key features of a Dobro resonator guitar are the fact that it has a single inverted resonator with a concave surface facing upwards. The Dobro resonator guitar was 1st made in 1927.
Under the rear of the resonator box at the front of the engine. Just infront of where the butterfly valve for the engine intake.