Fitment - For 1999-2006 Chevrolet Silverado 1500; 2007 Chevrolet Silverado 1500 Classic; 1999-2006 GMC Sierra 1500; 2007 GMC Sierra 1500 Classic What it is - Front control arm bumpers (2 pieces) and rear axle rubber bumpers (2 pieces) - Front bumper replacements part numbers 15153958 or 905-208 - Rear bumper replacements part numbers 523-049 or 15712438 Why you need it - Replaces worn or damaged bumpers to cushion control arms and reduce metal-to-metal contact - Helps maintain proper clearance and ride quality by restoring stock bumper support Compatibility and checks - Interchangeable OEM-equivalent part numbers: 15712438, 15153958, 523-049, 905-208 - Part numbers: 15712438, 15153958, 523-049, 905-208 - Please ensure the interchange part number matches the part you are replacing - Check photos and ensure the part shown matches your stock component What’s included - 2 front control arm bumpers - 2 rear axle rubber bumpers How to verify fit - Compare OEM/interchange numbers to your existing parts - Review photos to confirm identical appearance to your stock bumper set Use scenarios - During suspension service on 1999-2006 Silverado/Sierra 1500 or 2007 Classic models to replace worn bumpers - After off-road driving or rough roads to restore cushion and reduce noise from worn bumpers - As part of a control arm or axle maintenance project to ensure proper bumper alignment and function