Monroe Shocks & Struts 40304 Rear Air Shock Absorber

The Monroe Shocks & Struts 40304 is a rear air shock absorber engineered to restore a comfortable, controlled ride on vehicles equipped with air ride suspension. Featuring an integrated air bladder, it provides weight assistance and a leveling effect — helping to compensate for varying loads while isolating impact-related noise, vibration, and harshness. Built on a single-tube (MonoTube) design and gas charged for consistent damping performance, this shock is leak and burst tested to ensure a reliable seal. The specially formulated rubber air bellows are designed for extended service life.

Key Features:

• Single-tube (MonoTube) internal construction with gas charge for responsive, consistent damping
• Air adjustable design with rubber air bladder and heavy-duty crimping rings included
• Internal rebound bumper and bump stop included for added protection at travel limits
• Loop (eyelet) bushing upper and lower mounts for straightforward installation
• Extended length: 22.489 in.; compressed length: 396 mm; travel: 175 mm
• Body diameter: 1.969 in.; painted black finish
• New (not remanufactured); mounting hardware not included

The Monroe 40304 is a quality replacement air shock absorber compatible with select 2015–2020 Cadillac, Chevrolet, and GMC models. No dust shield or coil-over spring is included; verify that your vehicle's existing mounting hardware and air supply components are in serviceable condition before installation.