The Bilstein B8 shocks are built for a 2011-2026 GMC Sierra 2500 HD (GMT900/K2XX/T1XX) that has been lifted or leveled, valved for the taller ride height rather than fighting it.
Built in Germany to original-equipment standards and finished to survive road salt and grit, this is a bolt-in part with no modification required. Backed by Bilstein”s limited lifetime warranty.
Features
46mm monotube design ensures consistent, fade-free performance in all conditions
Self-adjusting deflective disc valving reacts immediately to surface changes enabling maximum vehicle control
Remote reservoir increases shock oil capacity for greater heat dissipation
Specifications
| Part Number |
25-311884 |
| Part Name |
Shock Absorber |
| UPC |
651860899527 |
| Vehicle |
2011-2026 GMC Sierra 2500 HD |
| Chassis Code |
GMT900/K2XX/T1XX |
| Drivetrain |
RWD/4WD |
| Adjustable Damping |
Non-Adjustable |
| Billet Reservoir Clamp Included |
Yes |
| Body Design |
Smooth Body (Non-Coilover) |
| Boot Included |
No |
| Collapsed Length |
13.86 in. (352mm) |
| Extended Length |
18.55 in. (471.2mm) |
| Finish |
Zinc Plated |
| Internal Design |
Monotube |
| Lower Mount Type |
Clevis |
| Piston Diameter |
46mm |
| Vehicle Placement |
Front |
| Reservoir |
Yes |
| Segment |
Light Truck |
| Series |
B8 5160 |
| Shaft Diameter |
14mm |
| Spring Seat Included |
No |
| Stroke/Travel Length |
4.69 in. (119.1mm) |
| Upper Mount Type |
Crossbar |
| Notes |
Fits Vehicles With 1.5″” Front Lift |
Vehicle Fitment
2011 GMC Sierra 2500 HD RWD/4WD (GMT900/K2XX/T1XX)
2012 GMC Sierra 2500 HD RWD/4WD (GMT900/K2XX/T1XX)
2013 GMC Sierra 2500 HD RWD/4WD (GMT900/K2XX/T1XX)
2014 GMC Sierra 2500 HD RWD/4WD (GMT900/K2XX/T1XX)
2015 GMC Sierra 2500 HD RWD/4WD (GMT900/K2XX/T1XX)
2016 GMC Sierra 2500 HD RWD/4WD (GMT900/K2XX/T1XX)
2017 GMC Sierra 2500 HD RWD/4WD (GMT900/K2XX/T1XX)
2018 GMC Sierra 2500 HD RWD/4WD (GMT900/K2XX/T1XX)
2019 GMC Sierra 2500 HD RWD/4WD (GMT900/K2XX/T1XX)
2020 GMC Sierra 2500 HD RWD/4WD (GMT900/K2XX/T1XX)
2021 GMC Sierra 2500 HD RWD/4WD (GMT900/K2XX/T1XX)
2022 GMC Sierra 2500 HD RWD/4WD (GMT900/K2XX/T1XX)
2023 GMC Sierra 2500 HD RWD/4WD (GMT900/K2XX/T1XX)
2024 GMC Sierra 2500 HD RWD/4WD (GMT900/K2XX/T1XX)
2025 GMC Sierra 2500 HD RWD/4WD (GMT900/K2XX/T1XX)
2026 GMC Sierra 2500 HD RWD/4WD (GMT900/K2XX/T1XX)
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