2007.5 Silverado Rear Differential Cover

[Fast325it]

The rear dif cover has developed a leak on my 2007.5 5.3 4wd Silverado. I thought I'd replace the old corroded cover with a new cover and gasket but after a bit of world wide web searching I don't know what I have for a rear end. The aftermarket companies ask for size (7.5", 8.5" ...) and bolt pattern. Bolt pattern should be easy enough but how do I find out what rear end I have?

[sefiroxx]

Normally it's just the gasket failing. Drain, remove cover, clean it and the diff up, install new gasket with new bolts and refill.

[Mikebtte]

Count the number of bolts and that is the diff. Prolly a 10 bolt 8.5 - 8.6 ish.

Many options on Diff cover

OEM replacement

Aftermarket

[swathdiver]

14 hours ago, Fast325it said:

The rear dif cover has developed a leak on my 2007.5 5.3 4wd Silverado. I thought I'd replace the old corroded cover with a new cover and gasket but after a bit of world wide web searching I don't know what I have for a rear end. The aftermarket companies ask for size (7.5", 8.5" ...) and bolt pattern. Bolt pattern should be easy enough but how do I find out what rear end I have?

Probably a 10-Bolt 8.6".  Might be a 14-Bolt 9.5".

[Korbin]

You could probably just clean and paint it. But idk how much they cost I guess if they’re real cheap might as well