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New catalytic converters for a 1999 Silverado 1500

Shop quoting $850 to replace

New catalytic converters for a 1999 Silverado 1500

Postby wk68 [OP] » Feb 12 2020, 6:54pm

Does this sound about right for new cats? I'm sure this is aftermarket parts and no welding involved. I knew there might be a few surprises when I bought this last month, and this is the first one :|
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Re: New catalytic converters for a 1999 Silverado 1500

Postby nealinator » Feb 12 2020, 7:08pm

New OEM parts (assumed 5.3 engine) run anywhere from $800-$1000 with a quick search. Just for the part.

https://www.gmpartsonline.net/oem-parts ... e-19206638

Aftermarket showing a good bit less. https://www.google.com/search?q=1920663 ... e&ie=UTF-8

A quick www.repairpal.com estimate came up with over $1400. You can use this site to find shops too.
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Re: New catalytic converters for a 1999 Silverado 1500

Postby wk68 [OP] » Feb 12 2020, 7:50pm

Can't beat that price then. Thanks for the tip on that website also, Neal!
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Re: New catalytic converters for a 1999 Silverado 1500

Postby nealinator » Feb 12 2020, 8:17pm

What about buying parts yourself and installing? Even better if you can do it.

I would be doing some detective work to figure out how they went bad. From my understanding cats dont really go bad unless something else is wrong...like O2 sensors causing incorrect fuel trims and clogging them up. Or you will just clog up new ones if nothing else is fixed.
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Re: New catalytic converters for a 1999 Silverado 1500

Postby wk68 [OP] » Feb 12 2020, 8:42pm

Well, they are original so age is likely the culprit. I started it up the other day, and heard the unmistakable sound of rocks or marbles ping-ponging around underneath (randomly). I also read that there is often an underlying cause, but since the truck has zero obvious performance issues then they apparently are falling apart internally.
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Re: New catalytic converters for a 1999 Silverado 1500

Postby zchrisz » Feb 13 2020, 8:02pm

no way would i pay 850 for cats. i have a 99 also. it makes noises in the exhaust... in my case it's the shields on the o2 sensors vibrating around.
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