I need your help! New to the forum. This is the only forum with the exact same issue you have as my issue. 100%. I have the first set of pitman arms and idler arms from ACDelco you had, part numbers and all. same issue. I want to buy the GM parts you bought for pitman/idler but I need to verify the part numbers you have. Please let me know the genuine gm part numbers that fixed the bump steer issue. 3 years into this issue and I need it fixed asap before new tires. TIA -Steven