The Icon Vehicle Dynamics 77727CP 2.5 VS (vehicle specific valving) PB (piggyback reservoir) CDCV (compression damping control valve) Shock Absorbers for the GMC Sierra 2500HD / 3500HD models are an amazing suspension upgrade. These shocks feature a 10-postion adjustment dial on the resi that allows you to fine tune the ride from smooth to firm. Constructed from a massive 2.5 inch 6061 aluminum body that increases oil capacity and houses a 7/8 diameter chrome shaft. The external reservoir improves performance by adding more oil capacity for better heat dispersion and resistance to fading.

Top Features and Benefits

• Vehicle specific valving (VS) for the GMC Sierra 2500HD / 3500HD
• Fits models with a 6-8 inch Rear Lift
• CDCV 10-position ride adjuster mounted to reservoir – Soft to Firm settings
• Easily adjust ride for a smooth or firm ride
• 2.5 inch diameter 6061 Aluminum Series body for great heat dissipation and corrosion resistance
• External reservoir improves oil capacity and off-road performance
• Polyurethane bushings and zinc plated sleeves
• 7/8 inch chrome plated steel shaft
• Monotube nitrogen charged gas design with external reservoir
• 100 % rebuildable