I changed out the OE ones on my 2001 for good measure a couple years ago when I did a heater core back flush. They had about 200k miles on them, weren't cracked or leaking and just looked a liitle faded in color. I replaced them with the same GM parts.
To tell you the truth, I never new these were a problem until I started reading on here a few years ago that they are such a problem! I mean, it's not like I see all these tahoes, yukons, and suburbans broke down on the side of the road everywhere I look, lol.
The aluminum Gruven parts look nice, but are very pricey and use rubber hose and clamps to connect, which right there makes more failure points if you ask me.
Now, if someone were to make metal ones that integrated the factory style quick connect system......win
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