2010 GMC W-Series Helper Springs
- Timbren®SES Rubber Helper Spring KitGMC W4500 Forward 2010, SES Rubber Helper Spring Kit by Timbren®. This SES Suspension Upgrade fits the rear suspension truck. Each laser cut piece of steel is precision bent and powder-coated to ensure a quality fit. Engineered hollow...Improves ride and handlingEliminates trailer sway and roll$269.36 - $667.05