Ihad a 99 chevy silverado 2500 4x4 i bought the lower ball joints for it but i sold it now i have a 2001 chevy tahoe that needs ball joints can i use the ones i have for the 99 2500 4x4 . they look to be the same size.

 

if the Tahoe is a 1500..no. if the Silverado is a 99 old bodystyle..no

 

the 99 silverado is the new body style

 

In 99 they had both the OBS and the NBS. The early ones were the OBS and the later ones in 99 were the NBS.