My dad has a 03 Silverado ECSB 4x4. Its got an auto, 4.8, and 3.73s. Stock, she rips one tire strong but in the snow or rain its a pain to get going...she needs some help.

What I need to know is what rear end is in it? Some say 8.5. Some say 8.6. Also which spline? What is a good LSD to use?

Thanks
Nick
03 ECSB
94 Impala SS-All the goodies
88 Monte 355/425HP
78 'Bu L69

 

Eaton LSD

 

Its 8.6 and I believe 30 spline.

Eaton is the way to go

 

Another vote for Eaton here.

Picture of a happy customer.

(Use only 80-90 mineral-based Gear Oil and 4oz friction modifier)

 

Anyone have a P/N for me? Everytime I try to order one, I get the wrong one in the mail...the place is always like oh yea this is the one. I guess not

Other than the LSD, what else should I get?

Thanks
Nick