Not passing Smog

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Rods Bowtie

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Apr 29, 2018
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Hello All have I have 2000 Tahoe Ls 5.3 and having issues with getting it to pass smog. I took it to my smog shop and was told the egr is not complete. I put a aftermarket egr on drove it a few 100 miles but still not complete. Any ideas?
Thanks
 
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