Hellwig 7267 Big Wig 1-5/16" Rear Sway Bar 2007-2010 Silverado/Sierra HD Duramax

Vehicle Fitment

• 2007-2010 Chevrolet Silverado 2500 HD - Duramax Diesel, SRW and DRW (Dually), 2WD/4WD - All Trims, All Cab Styles
• 2007-2010 Chevrolet Silverado 3500 HD - Duramax Diesel, SRW and DRW (Dually), 2WD/4WD - All Trims, All Cab Styles
• 2007-2010 GMC Sierra 2500 HD - Duramax Diesel, SRW and DRW (Dually), 2WD/4WD - All Trims, All Cab Styles
• 2007-2010 GMC Sierra 3500 HD - Duramax Diesel, SRW and DRW (Dually), 2WD/4WD - All Trims, All Cab Styles

Fitment Notes

• Duramax diesel-equipped trucks only - the 7267 is confirmed per Hellwig's product page title for "GM 07-10 2500/3500 HD With Duramax." The 6.6L Duramax diesel (LMM engine code for 2007.5-2010) trucks may have different rear axle tube dimensions or mounting geometry compared to gas-engine (Vortec 6.0L) configurations. For 2007-2010 Silverado/Sierra 2500HD/3500HD with the 6.0L gas engine, verify the correct Big Wig part number with Hellwig at 1-800-HELLWIG (435-5944).
• Covers both SRW (single rear wheel) and DRW (dual rear wheel / dually) configurations - confirmed by Hellwig's product page title "including Dually." This is one of the few Hellwig Big Wig sway bars that explicitly covers both axle configurations.
• The 7267 fits the GMT900 platform Silverado HD and Sierra HD (2007-2010 generation). This platform was introduced at the 2007.5 model year refresh. For the previous generation (2001-2006 GMT800 Silverado/Sierra 2500HD/3500HD), use Hellwig part #7269.
• The 7267 is an adjustable rate sway bar - multiple mounting positions at the end link attachment points allow the effective roll stiffness to be tuned for different payload conditions, driving styles, or with/without a truck camper or trailer attached.
• Compatible with air bag/air spring suspension kits. Big Wig sway bars are designed to complement air bag setups - the two upgrades work together for comprehensive rear load stability control.
• All mounting hardware, polyurethane bushings, end link assemblies, and brackets are included. No additional hardware purchases are required.
• Most 2007-2010 Silverado/Sierra 2500HD/3500HD trucks were not factory-equipped with a rear sway bar. The 7267 adds rear roll stiffness where none previously existed, which is the primary reason heavy-duty GM trucks experience rear body sway when towing.

Features

• 1-5/16" (33.3mm) solid bar diameter - the Big Wig series is Hellwig's largest-diameter, heaviest-duty sway bar lineup. The 7267 delivers over 20% more roll stiffness than standard Hellwig sway bars and is specifically engineered for the torsional demands of 3/4-ton and 1-ton Duramax diesel trucks operating under heavy tow and haul loads.
• Adjustable rate design - multiple end link mounting hole positions allow the roll stiffness to be set to match the current payload condition. Owners can configure the bar for loaded towing and then readjust for lighter or unloaded driving without removing the bar.
• Solid construction from heat-treated ASTM 4140 chromoly steel - tensile strength of 170,000 psi, hot-formed and heat-treated for maximum torsional rigidity and long-term fatigue resistance under the demanding cyclic stress of sustained heavy-duty tow and haul operation.
• Heavy-duty, stepped-up mounting hardware - TruckSpring notes that the Big Wig includes mounting hardware specifically scaled up in size over standard Hellwig sway bar kits, providing greater resistance to vibration and shock loads generated by the additional weight of truck campers, heavy fifth-wheel trailers, and gooseneck rigs.
• High-durometer polyurethane bushings throughout - more resilient and compression-resistant than rubber, maintaining precise bar positioning under sustained load and backed by Hellwig's 1,000,000-mile bushing warranty.
• Designed specifically for vehicles without factory rear sway bars - the GMT900 Silverado/Sierra 2500HD/3500HD typically shipped from the factory without a rear sway bar, leaving the rear suspension without torsional roll resistance. The 7267 fills that gap entirely.
• Reduces rear body roll and lateral sway under heavy towing - dramatically improves stability when pulling fifth-wheel trailers, hauling truck campers, towing gooseneck trailers, or operating under heavy commercial payloads where a tall center of gravity amplifies lateral weight transfer in corners.
• Improves overall handling balance between front and rear - adding rear roll stiffness creates a more neutral cornering posture and reduces the oversteer tendency that develops when a heavily loaded rear suspension rolls freely while the front stays flat.
• Bolt-on installation at the rear axle using factory axle mounting locations - no drilling required. Compatible with standard and lifted applications (extended end links can be special ordered for significantly lifted trucks - contact Hellwig).
• Gray/silver hammertone powder coat finish for long-term corrosion resistance in road salt, diesel soot, and wet-weather underbody environments on daily-driven and commercial work trucks.
• Manufactured at Hellwig's ISO 9001 and ISO 14001 certified facility in Visalia, California - made in the USA since 1946, backed by Hellwig's Limited Lifetime Warranty against manufacturing defects and a 1,000,000-mile bushing warranty.

Specifications

• Sway Bar Position: Rear
• Series: Big Wig
• Bar Diameter: 1-5/16 inches (33.3mm / 1.3125")
• Bar Type: Solid
• Bar Adjustability: Adjustable rate (multiple end link mounting positions)
• Material: Solid heat-treated ASTM 4140 chromoly steel
• Tensile Strength: 170,000 psi
• Finish: Gray/silver hammertone powder coat
• Bushings: High-durometer polyurethane (included) - 1,000,000-mile warranty
• Hardware Included: Yes - complete kit (heavy-duty U-bolts, brackets, end links, bushings, all hardware)
• Drilling Required: No
• Country of Manufacture: USA (Visalia, CA - ISO 9001 / ISO 14001 certified)
• Warranty: Limited Lifetime

Included Components

• 1x Solid 1-5/16" diameter heat-treated chromoly Big Wig rear sway bar, hammertone powder coated
• High-durometer polyurethane center bushing set
• Heavy-duty U-bolt mounting hardware
• Mounting brackets and saddle plates (heavy-gauge, scaled up from standard Hellwig kits)
• End link assemblies with polyurethane bushings (multiple hole positions for adjustability)
• All associated bolts, nuts, and washers
• Installation instructions

Product Description

The Hellwig 7267 Big Wig is a 1-5/16" adjustable solid chromoly rear sway bar engineered specifically for the 2007-2010 Chevrolet Silverado and GMC Sierra 2500 HD and 3500 HD - Duramax diesel-equipped trucks only, in both SRW and DRW (dually) configurations, 2WD and 4WD. As the Big Wig flagship for the GMT900 heavy-duty GM platform, the 7267 delivers the maximum rear roll stiffness available in Hellwig's sway bar lineup for these trucks - over 20% more torsional resistance than standard sway bars - making it the definitive handling upgrade for 3/4-ton and 1-ton Duramax owners who tow fifth-wheel trailers, haul truck campers, pull gooseneck loads, or carry heavy payloads where factory body roll becomes a safety concern.

Most 2007-2010 Silverado/Sierra 2500HD/3500HD trucks shipped from GM without a factory-installed rear sway bar, leaving the rear suspension with zero torsional roll resistance. The 7267 fills that gap with a solid chromoly bar, heavy-duty scaled-up mounting hardware, and a multi-position adjustable end link design that allows roll stiffness to be tuned for different load conditions. The high-durometer polyurethane bushings maintain precise bar positioning under sustained load and are backed by Hellwig's 1,000,000-mile bushing warranty. All hardware is included - U-bolts, brackets, end links, and bushings - and installation uses the factory axle mounting locations without drilling.

Before ordering, verify that your Silverado/Sierra 2500HD/3500HD is equipped with the 6.6L Duramax diesel engine - the 7267 is specifically confirmed for Duramax-equipped trucks, and gas-engine trucks should be verified with Hellwig before ordering. The 7267 is fully compatible with air bag suspension systems and can be installed alongside Firestone, Air Lift, or similar helper air spring kits for a complete rear load management package. For 2001-2006 Silverado/Sierra HD, use Hellwig part #7269. For 2011+ Silverado/Sierra HD, use Hellwig part #7270. Manufactured at Hellwig's ISO 9001 and ISO 14001 certified facility in Visalia, California and backed by a Limited Lifetime Warranty.