Overview
The King Shocks 25001-201 is an OEM Performance Series rear shock with a remote reservoir, sold as a pair. It is made for 2001 to 2010 Chevrolet Silverado and GMC Sierra 2500 and 3500 trucks, covering standard, HD and Classic versions in the trims shown in the fitment section.
Each kit is custom tuned with a damping curve and spring rate set through real-world testing, and it bolts into stock vehicles without cutting or welding. The large 2.5 inch shock bodies with external reservoirs add fluid capacity and heat dissipation. Rear kits give a 15% increase in wheel travel, and the lift setting is 0 in. lift or drop.
Key features
- Rear position, sold as a pair
- OEM Performance Series construction
- Remote, external reservoir
- Large 2.5 inch shock bodies
- 15% rear wheel travel increase, per King
- Bolt-on installation with no cutting or welding, per King
- Valve adjustment with simple hand tools
- Maximum tire size 33 inch
Towing and load considerations
Heavy duty trucks carry more load and tow more often, so rear shocks spend more time under strain. External reservoirs help the shock body stay cooler when the truck is working hard, which supports steady damping on long grades. Load changes the rear ride height, so check how the truck sits before and after adding a trailer or cargo.
Rear shock service often goes with bushings, rubber mounts and bump stops. Look for oil on the shock body, a rear end that keeps rebounding after bumps, or uneven tire wear. Replacing both shocks at the same time keeps the rear axle controlled and avoids a mismatched feel.
- Check ride height with the usual load
- Inspect eye bushings for cracks
- Replace both sides together
Specifications
| Brand | King Shocks |
|---|---|
| Part number | 25001-201 |
| UPC | 700005378479 |
| Position | Rear |
| Shock series | Performance Series |
| Lift height | 0 in. lift or drop |
| Max tire size | 33 inch |
| Shock body diameter | 2.5 inch |
| Reservoir | Remote, external |
| Hydraulic / gas charged | Gas charged |
| Wheel travel increase | 15% (rear, per King) |
| Fitment type | Direct fit |
| Sold as | Pair |
Vehicle fitment
It fits the 2001 to 2004 and 2007 Chevrolet Silverado 2500, the 2001 to 2010 Silverado 2500 HD, the 2007 Silverado 2500 HD Classic, the 2001 to 2006 and 2007 Silverado 3500 and 3500 Classic, and the 2007 to 2010 Silverado 3500 HD. The same years and models apply to the GMC Sierra, with trims including Base, LS, LT, LTZ, WT, SL, SLE and SLT.
Silverado 1500 models, other model years and Ford and Ram trucks are not covered. Make sure your year, model and trim match before you buy.
Installation notes
The kit is a bolt-on job with no cutting or welding. The lift setting is 0 in. lift or drop, so check your truck’s ride height before fitting. Confirm the external reservoirs clear the frame and body mounts, and support the rear axle on stands during installation.
What’s included
A pair of rear OEM Performance Series shocks with external reservoirs.
