Gabriel ProGuard 1 Pack 61643 Front for Chevrolet Avalanche; Silverado; GMC Sierra; Yukon; Selected Models ProGuard shocks from the Original Gabriel are specifically engineered for comfort and control in today’s trucks, vans and SUVs. While going off-road probably isn’t a daily activity, you can still expect reliable performance and durability from Gabriel ProGuard shocks. Super-finished chromed piston rod provides superior corrsion resistance for longer life. View largerEngineered for comfort and control in today’s trucks, vans and SUVs, Gabriel ProGuard shocks absorbers’ larger diameter piston delivers better-than-OE response and performance with increased oil capacity for better heat dissipation to maintain control. ProGuard shocks' features include:Piston seal reduces oil by-pass for maximum shock control and performanceLarger reservoir tube provides better cooling for longer shock lifeLow friction oil seal for greater comfort and longer shock life1-3/8" bore piston construction for greater durabilityAnd like all Gabriel shocks and struts, ProGuard shocks feature:A super-finished chromed piston rod to inhibit corrosion, ensure proper seal lubrication, provide a more consistent wear surface A leak-proof piston seal which extends product lifeD.O.M. (Drawn-Over-Mandrel) Tubing that reduces internal wear for longer product lifeAbout GabrielStarting in 1907, Gabriel invented the original shock absorber, followed by the first hydraulic shock absorber, the first adjustable shock absorber and the first air adjustable shock absorber. And today, it's still that same innovative, independent American company--building high-performance shocks and struts that cover over 96% of North American vehicles. Gabriel continues adding new product coverage, including expanding their line of ReadyMount strut assemblies, which make installation faster, safer and easier. And Gabriel continues that independent spirit, working hard to deliver innovative new products and services, every day.