Is this part for 4wd models? 2011 gmc sierra 4wd
Hi, it's fit the 2011 GMC sierra 1500 All Models (Excludes Classic Models).
Is this for set
Hi, yes. It's a set for Front Upper Left and right Control Arm.
1x Front Upper Left Control Arm and Ball Joint Assembly
1x Front Upper Right Control Arm and Ball Joint Assembly.