The Bilstein 4600 Series front shock (part 24-196437) is a yellow, gas-charged monotube unit from the manufacturer's B6 4600 line, sized for the 2011-and-later GMC Sierra 3500 HD, including the 2013 Denali. The monotube layout runs oil and nitrogen separately in one high-pressure tube, which the manufacturer says prevents the foaming that can make twin-tube OE shocks fade on long grades, repeated bumps, and heavy towing. Each B6 part number also gets its own velocity-sensitive digressive piston valving, tuned to the truck's spring rate and intended use. That matters more than price when the truck is loaded or pulling a trailer. For lifted trucks, owners on user forums point to the ride-height adjustable 5100 series instead.
Because the B6 4600 is built for stock-height trucks, this is a direct-fit replacement that works with factory springs and does not add lift. Front-end work is the harder job on these trucks. Owners on user forums describe a crowded front end with a coil-over strut that must be unloaded before the old shock comes out. Shoppers often search for terms like 2011-2024 Sierra 3500HD front monotube shock, B6 4600 24-196437 stock height, and GMT900 HD front shock swap.
The manufacturer designs B6 4600 shocks as direct-fit upgrades for stock-height light trucks and SUVs. If your truck has a lift or a leveling kit, confirm fitment with the manufacturer before ordering.
No. The manufacturer lists the B6 4600 series as non-adjustable. Owners on user forums who want ride-height adjustability on these trucks usually choose the 5100 series.
Owners on user forums report that on 2014-and-newer trucks, the front shock sits inside a coil-over strut, so the spring must be compressed to remove the top nut. Confirm the process for your model year before starting.
Expect the rear shocks to be a straightforward bolt-in job and the fronts to be considerably harder. Owners on user forums say the front requires disassembling the strut and compressing the spring, and many recommend a shop or quality spring compressors rather than improvised tools. Plan on a 1/2-inch drive socket set, wrenches, and anti-seize for the bolts. Owners also say that removing the strut is not optional on newer trucks. Do not attempt to swap the shock while the strut is still bolted to the truck. If you do the work yourself, keep the spring compressed the whole time and check that the top and bottom mounts are fully torqued before lowering the truck.
