Looking for aftermarket parts to modify or upgrade your 2012 GMC Sierra 3500 HD with side steps? At Tunersports.com we carry a huge selection of the top name brand performance side step parts and accessories for your Sierra 3500 HD.
Whether you have a 2012 GMC Sierra 3500 HD in Denali to WT trim we have you covered. We have 91 side steps available to mod your Sierra 3500 HD. All parts have free shipping to the Continental US 48 States.
 SHIPS FROM MANUFACTURER C1173QCBuilt with today's work truck in mind, N-FAB offers its patented hoop step design and innovative mounting system in a Cab Length configuration. Designed with classic N-FAB styling, Cab Length Nerf Steps are ideal for flat bed trucks, stake bed trucks, vehicles with campers, and even trucks with side... N-Fab Nerf Step 11-14 Chevy-GMC 2500/3500 Ext. Cab - Gloss Black - Cab Length - 3in 2011-2013 GMC Sierra 3500 HD SLE / SLT / WT $479.99 |
 SHIPS FROM MANUFACTURER C1173QC-TXBuilt with today's work truck in mind, N-FAB offers its patented hoop step design and innovative mounting system in a Cab Length configuration. Designed with classic N-FAB styling, Cab Length Nerf Steps are ideal for flat bed trucks, stake bed trucks, vehicles with campers, and even trucks with side... N-Fab Nerf Step 11-14 Chevy-GMC 2500/3500 Ext. Cab - Tex. Black - Cab Length - 3in 2011-2013 GMC Sierra 3500 HD SLE / SLT / WT $479.99 |
 SHIPS FROM MANUFACTURER C1180CCBuilt with today's work truck in mind, N-FAB offers its patented hoop step design and innovative mounting system in a Cab Length configuration. Designed with classic N-FAB styling, Cab Length Nerf Steps are ideal for flat bed trucks, stake bed trucks, vehicles with campers, and even trucks with side... N-Fab Nerf Step 11-14 Chevy-GMC 2500/3500 Crew Cab - Gloss Black - Cab Length - 3in 2011-2014 GMC Sierra 3500 HD Denali / SLE / SLT / WT $529.99 |
SHIPS FROM MANUFACTURER C1180CC-TXBuilt with today's work truck in mind, N-FAB offers its patented hoop step design and innovative mounting system in a Cab Length configuration. Designed with classic N-FAB styling, Cab Length Nerf Steps are ideal for flat bed trucks, stake bed trucks, vehicles with campers, and even trucks with side... N-Fab Nerf Step 11-14 Chevy-GMC 2500/3500 Crew Cab - Tex. Black - Cab Length - 3in 2011-2014 GMC Sierra 3500 HD Denali / SLE / SLT / WT $529.99 |
 SHIPS FROM MANUFACTURER C1184RC-4N-FAB is the industry leader in making quality Nerf-Bars, Pre-Runners and other Off-Road accessories. We design and manufacture the strongest, most durable and best looking Nerf-Bars available in the industry today. At N-FAB are committed to building a heavy duty, high end, high quality tubular part... N-Fab Nerf Step 11-14 Chevy-GMC 2500/3500 Regular Cab 8ft Bed - Gloss Black - Bed Access - 3in 2011-2012 GMC Sierra 3500 HD SLE / WT $549.99 |
SHIPS FROM MANUFACTURER C1184RC-4-TXN-FAB is the industry leader in making quality Nerf-Bars, Pre-Runners and other Off-Road accessories. We design and manufacture the strongest, most durable and best looking Nerf-Bars available in the industry today. At N-FAB are committed to building a heavy duty, high end, high quality tubular part... N-Fab Nerf Step 11-14 Chevy-GMC 2500/3500 Regular Cab 8ft Bed - Tex. Black - Bed Access - 3in 2011-2012 GMC Sierra 3500 HD SLE / WT $549.99 |
 SHIPS FROM MANUFACTURER HPC0773QC-SSPatented N-FAB hoop step design featuring an all-new expanded and enclosed sure-grip step plate. With a 3 in. main tube diameter, this application fits high and tight to the vehicle body for a clean modern style. Fully welded 1-piece construction for strength, long lasting durability and ease of ins... N-Fab Podium SS 07-13 Chevy-GMC 2500/3500 07-10 1500 Ext. Cab - Polished Stainless - 3in 2007-2013 GMC Sierra 3500 HD SLE / SLT / WT $699.99 |
IN STOCK HPC0773QC-TXPatented N-FAB hoop step design featuring an all-new expanded and enclosed sure-grip step plate. With a 3 in. main tube diameter, this application fits high and tight to the vehicle body for a clean modern style. Fully welded 1-piece construction for strength, long lasting durability and ease of ins... N-Fab Podium LG 07-13 Chevy-GMC 2500/3500 07-10 1500 Ext. Cab - Tex. Black - 3in 2007-2013 GMC Sierra 3500 HD SLE / SLT / WT $549.99 |
SHIPS FROM MANUFACTURER HPC0780CC-SSPatented N-FAB hoop step design featuring an all-new expanded and enclosed sure-grip step plate. With a 3 in. main tube diameter, this application fits high and tight to the vehicle body for a clean modern style. Fully welded 1-piece construction for strength, long lasting durability and ease of ins... N-Fab Podium SS 07-13 Chevy-GMC 2500/3500 07-10 1500 Crew Cab - Polished Stainless - 3in 2007-2014 GMC Sierra 3500 HD SLE / SLT / WT 2011-2014 GMC Sierra 3500 HD Denali $699.99 |
IN STOCK - LOW HPC0780CC-TXPatented N-FAB hoop step design featuring an all-new expanded and enclosed sure-grip step plate. With a 3 in. main tube diameter, this application fits high and tight to the vehicle body for a clean modern style. Fully welded 1-piece construction for strength, long lasting durability and ease of ins... N-Fab Podium LG 07-13 Chevy-GMC 2500/3500 07-10 1500 Crew Cab - Tex. Black - 3in 2007-2014 GMC Sierra 3500 HD SLE / SLT / WT 2011-2014 GMC Sierra 3500 HD Denali $549.99 |
 SHIPS FROM MANUFACTURER 107417322Built with today's work truck in mind, N-FAB offers its patented hoop step design and innovative mounting system in a Cab Length configuration. Designed with classic N-FAB styling, Cab Length Nerf Steps are ideal for flat bed trucks, stake bed trucks, vehicles with campers, and even trucks with side... N-Fab RS Nerf Step 07-13 GM 1500 / 08-14 GM 2500/3500 SRW Extended Cab Length - Tex. Black 2008-2013 GMC Sierra 3500 HD SLE / SLT / WT $399.99 |
IN STOCK - LOW 107418012Built with today's work truck in mind, N-FAB offers its patented hoop step design and innovative mounting system in a Cab Length configuration. Designed with classic N-FAB styling, Cab Length Nerf Steps are ideal for flat bed trucks, stake bed trucks, vehicles with campers, and even trucks with side... N-Fab RS Nerf Step 07-13 GM 1500 / 08-14 GM 2500/3500 SRW Crew Cab Length - Tex. Black 2008-2014 GMC Sierra 3500 HD SLE / SLT / WT 2011-2014 GMC Sierra 3500 HD Denali $399.99 |
 IN STOCK 14180Xtremeline Side Bars has the styling appeal of a side bar coupled with easy installation. Also, features and strength of a running board. With 50% more step area than regular tube steps and with a finished OE look. These bars are styling, yet functional. The end caps provide a streamline look and be... Rampage 1999-2019 Universal Xtremeline Step Bar 80 Inch - Stainless 2007-2013 GMC Sierra 3500 HD SLE / SLT / WT $348.36 |
 IN STOCK 14190Xtremeline Side Bars has the styling appeal of a side bar coupled with easy installation. Also, features and strength of a running board. With 50% more step area than regular tube steps and with a finished OE look. These bars are styling, yet functional. The end caps provide a streamline look and be... Rampage 1999-2019 Universal Xtremeline Step Bar 90 Inch - Stainless 2011-2014 GMC Sierra 3500 HD Denali / SLE / SLT / WT $380.70 CLEARANCE VIEW PRICE IN CART |
 IN STOCK - LOW 16180Xtremeline Side Bars has the styling appeal of a side bar coupled with easy installation features and strength of a running board. With 50% more step area than regular tube steps with finished, OE look, these bars are styling, yet functional. The end caps provide a streamline look and be painted for... Rampage 1999-2019 Universal Xtremeline Step Bar 80 Inch - Black 2007-2013 GMC Sierra 3500 HD SLE / SLT / WT $251.34 |
 IN STOCK - LOW 16190Xtremeline Side Bars has the styling appeal of a side bar coupled with easy installation features and strength of a running board. With 50% more step area than regular tube steps with finished, OE look, these bars are styling, yet functional. The end caps provide a streamline look and be painted for... Rampage 1999-2019 Universal Xtremeline Step Bar 90 Inch - Black 2011-2014 GMC Sierra 3500 HD Denali / SLE / SLT / WT $283.68 |