# TMC 78-34812 Rear Shock Absorber for 2011-2024 Chevrolet Silverado 3500 HD, GMC Sierra 3500 HD ### Performance Overview The TMC 78-34812 Shock Absorber is designed as a direct replacement part for compatible Chevrolet Silverado 3500 HD, GMC Sierra 3500 HD applications. It is built to support reliable performance, proper fitment, and straightforward installation when replacing a worn or damaged component. **Installation Position:** Rear ### Key Features - Precision engineered with G-Force technology for the ultimate in safety and performance - Working tube made of SteelPro™ alloy steel to provide superior strength - toughness and impact resistance while maintaining unmatched ductility - Surface-treated provides abrasive and contaminant protection while preventing rust - Piston rods made of S45C medium carbon steel for precision and wear resistance ### Interchange Numbers **Interchange / Cross Reference Part Numbers:** G64121, 3450026, 34812, 20906291, 20906292, 20906293, 20908414, 20908415, 22808247, 22980433, 22980437, 22990466, 22990470, 22990471, 22990472, 22990473, 22990474, 22990475, 22990476, 22993218, 22993219, 22993220, 23315259, 23315260, 23315261, 23315262, 23315263, 23315264, 23315265, SEE, 251280 Please compare these interchange numbers with your original part number and confirm vehicle compatibility before ordering. ### Vehicle Fitment Review the vehicle fitment list below to confirm this part matches your vehicle before purchase. - 2011 Chevrolet Silverado 3500 HD - 2012 Chevrolet Silverado 3500 HD - 2013 Chevrolet Silverado 3500 HD - 2014 Chevrolet Silverado 3500 HD - 2015 Chevrolet Silverado 3500 HD - 2016 Chevrolet Silverado 3500 HD - 2017 Chevrolet Silverado 3500 HD - 2018 Chevrolet Silverado 3500 HD - 2019 Chevrolet Silverado 3500 HD - 2020 Chevrolet Silverado 3500 HD - 2021 Chevrolet Silverado 3500 HD - 2022 Chevrolet Silverado 3500 HD - 2023 Chevrolet Silverado 3500 HD - 2024 Chevrolet Silverado 3500 HD - 2011 GMC Sierra 3500 HD - 2012 GMC Sierra 3500 HD - 2013 GMC Sierra 3500 HD - 2014 GMC Sierra 3500 HD - 2015 GMC Sierra 3500 HD - 2016 GMC Sierra 3500 HD - 2017 GMC Sierra 3500 HD - 2018 GMC Sierra 3500 HD - 2019 GMC Sierra 3500 HD - 2020 GMC Sierra 3500 HD - 2021 GMC Sierra 3500 HD - 2022 GMC Sierra 3500 HD - 2023 GMC Sierra 3500 HD - 2024 GMC Sierra 3500 HD ### Vehicle Fitment Table Year Make Model Position 2011 Chevrolet Silverado 3500 HD Rear 2012 Chevrolet Silverado 3500 HD Rear 2013 Chevrolet Silverado 3500 HD Rear 2014 Chevrolet Silverado 3500 HD Rear 2015 Chevrolet Silverado 3500 HD Rear 2016 Chevrolet Silverado 3500 HD Rear 2017 Chevrolet Silverado 3500 HD Rear 2018 Chevrolet Silverado 3500 HD Rear 2019 Chevrolet Silverado 3500 HD Rear 2020 Chevrolet Silverado 3500 HD Rear 2021 Chevrolet Silverado 3500 HD Rear 2022 Chevrolet Silverado 3500 HD Rear 2023 Chevrolet Silverado 3500 HD Rear 2024 Chevrolet Silverado 3500 HD Rear 2011 GMC Sierra 3500 HD Rear 2012 GMC Sierra 3500 HD Rear 2013 GMC Sierra 3500 HD Rear 2014 GMC Sierra 3500 HD Rear 2015 GMC Sierra 3500 HD Rear 2016 GMC Sierra 3500 HD Rear 2017 GMC Sierra 3500 HD Rear 2018 GMC Sierra 3500 HD Rear 2019 GMC Sierra 3500 HD Rear 2020 GMC Sierra 3500 HD Rear 2021 GMC Sierra 3500 HD Rear 2022 GMC Sierra 3500 HD Rear 2023 GMC Sierra 3500 HD Rear 2024 GMC Sierra 3500 HD Rear ### FAQ **Will this fit a 2011 Chevrolet Silverado 3500 HD?** Yes, this Shock Absorber fits the vehicles listed in the Vehicle Fitment section above. Please confirm the year, make, model, and position before ordering. **What position does this part fit?** This part is listed for the Rear position on compatible vehicles. **Can I use the interchange numbers to confirm compatibility?** Yes. Compare the interchange or cross-reference numbers shown above with your original part number, then verify the vehicle fitment before ordering. **Is professional installation recommended?** Professional installation is recommended to help ensure proper fit, safe operation, and correct system performance. ### Common Searches - Shock Absorber for Chevrolet Silverado 3500 HD, GMC Sierra 3500 HD - Rear Shock Absorber for 2011 Chevrolet Silverado 3500 HD - TMC 78-34812 Shock Absorber - replacement 78-34812 Shock Absorber - 2011-2024 Chevrolet Silverado 3500 HD, GMC Sierra 3500 HD Shock Absorber ## Details - **Price:** 57.41 CAD - **Vendor:** TMC - **Type:** Shock Absorber - **Tags:** 2011 Chevrolet Silverado 3500 HD, 2011 GMC Sierra 3500 HD, 2011-2024 Chevrolet Silverado 3500 HD, 2011-2024 GMC Sierra 3500 HD, 2012 Chevrolet Silverado 3500 HD, 2012 GMC Sierra 3500 HD, 2013 Chevrolet Silverado 3500 HD, 2013 GMC Sierra 3500 HD, 2014 Chevrolet Silverado 3500 HD, 2014 GMC Sierra 3500 HD, 2015 Chevrolet Silverado 3500 HD, 2015 GMC Sierra 3500 HD, 2016 Chevrolet Silverado 3500 HD, 2016 GMC Sierra 3500 HD, 2017 Chevrolet Silverado 3500 HD, 2017 GMC Sierra 3500 HD, 2018 Chevrolet Silverado 3500 HD, 2018 GMC Sierra 3500 HD, 2019 Chevrolet Silverado 3500 HD, 2019 GMC Sierra 3500 HD, 2020 Chevrolet Silverado 3500 HD, 2020 GMC Sierra 3500 HD, 2021 Chevrolet Silverado 3500 HD, 2021 GMC Sierra 3500 HD, 2022 Chevrolet Silverado 3500 HD, 2022 GMC Sierra 3500 HD, 2023 Chevrolet Silverado 3500 HD, 2023 GMC Sierra 3500 HD, 2024 Chevrolet Silverado 3500 HD, 2024 GMC Sierra 3500 HD, 20906291, 20906292, 20906293, 20908414, 20908415, 22808247, 22980433, 22980437, 22990466, 22990470, 22990471, 22990472, 22990473, 22990474, 22990475, 22990476, 22993218, 22993219, 22993220, 23315259, 23315260, 23315261, 23315262, 23315263, 23315264, 23315265, 251280, 3450026, 34812, 78-34812, Absorber, AI Readable Fitment, Chevrolet Silverado 3500 HD, G64121, GMC Sierra 3500 HD, GMC Sierra 3500 HD Shock Absorber, Rear, Rear Shock Absorber for 2011 Chevrolet Silverado 3500 HD, replacement 78-34812 Shock Absorber, replacement auto part, SEE, Shock Absorber, Shock Absorber fitment, Shock Absorber for Chevrolet Silverado 3500 HD, Shocks, TMC, TMC 78-34812 Shock Absorber, TMC Shock Absorber, vehicle fitment ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 57.41 CAD | In stock | ## Images - TMC_Shock Absorber_78-34812 --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/rear-shock-absorber-for-gmc-sierra-3500-hd-chevrolet-silverado-cab-chassis) > Updated: 2026-06-02