Question about GMC Sierra 1500

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I have a @004 GMC Sierra with a broken differential. I know that it is 3:73 gears but i need to know everything else about the rear differential so that i know which one to get. Like the spline count and how big it is like 7.5 inch or 8.5 inch

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  • nkstevie Dec 30, 2010

    I have a 2004 GMC Sierra 1500. I need to buy a new rear differential. It has 3:73 gears but i need to know the size and the spline count of the differential. But i do not want to buy a whole axle assembly

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Hi and welcome to FixYa!

As far as I can remember it has 41splines but to be sure, open the rear differential and mark it. Make a full turn of the wheel for you to count the spline manually just to be sure.

Hope this helps and thank you for using FixYa! Have a good one!

Posted on Dec 30, 2010

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Just get a complete rear axle from a accident damaged vehicle in the scrapyard then it doesnt matter

Posted on Dec 30, 2010

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Here are the Pro code for the rear ends to your Sierra and you can match one up at a Salvage Yard.
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Good luck and keep me posted and call around Salvage Yards, there prices will differ from one to the next salvage yard and don't ask them for a posi rear end. The cost will you more, just search all the SUV's and look at the pro codes in the glove box. Hunt, most awd system SUV will have the G80 rear end.

Good luck and keep me posted.

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