O2 Oxygen Sensor Downstream Upstream 234-4018 234-4337 Replacement for 06-07 Chevy Silverado 1500 Avalanche Suburban Tahoe Set of 4

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Both lower 02 sensors are faulty so now have to order more , don’t recommend this product save yourself time and purchase quality elsewhere

The 2 downstream do not work and I’ve seen this on forums they state something about the heater, so I’m in the process of returning them.

if you have the 07 6.2 then you know the headache that comes with needing to change your atf /o2 sensors. the 6.2 has it's own specific part number & you cannot use the ones that fit the rest of the model year's unanimous part number, like every other car in the world.. there is only one part number for the 07 by itself. so, i deal alot with customers who still throw the p0425 / p0429 after having replaced their o2 sensors with what theyd believed to have been the correct set.its very particular. measure your wiring length. match your part numbers. pay attention. use rock auto to verify for proper match. do not just rely on amazon fitment alone.you will give yourself a headache & a needless trip the the mechanic if you do not pay attention to these details if you have the 2007... just the 2007these are a proper fit. i replace mine every 10k miles as i have a high mileage truck @ 310k that i just rebuilt from the ground up. so i had no codes - but did not throw any after installing, either. this is one sign of a proper fit.these are a good quality, OEM grade replacement.a tip - always replace - not repair.

If you need to replace the upstream and downstream O2 sensors in your Silverado then this kit will do. Make sure that the part number is a match and then order. I wasn't throwing any O2 codes but my mileage was right and wanted to keep things running smoothly. Highly recommend these.

Absolute junk. Don’t buy unless you’re wanting to spend money on something that’s going to cause more problems than you started with.