Chevrolet 1500 differential..thoughts..?

I have a 2000 5.3 Suburban (9th gen). I had the differential rebuilt last year. Last week I discovered that the left side axle seal was leaking and I replaced it. The pinion seal is also leaking but, I'm ignoring it for now. These seals are a year old and installed by a great mechanic at a local shop. I inspected the ring gear and all the parts I could see for any wear or signs of excessive heat and found no issues.

I use this Suburban for towing my camper, 5800 dry, about 6800-ish wet.

What's your experience with the GM differentials in the 1500 series trucks, 1999.5 - 2006?

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Chevrolet 1500 differential..thoughts..?