r/GMCACADIA

▲ 1 r/GMCACADIA+1 crossposts

[Help] 2022 GMC Acadia AT4 persistent P0420/P0430 after replacing all O2 sensors

Hey everyone, my 2022 GMC Acadia AT4 3.6L keeps throwing P0420/P0430 even after replacing all 4 O2 sensors with new GM Genuine sensors. Anyone else seen this and how was it ultimately fixed?

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u/coolstarybrew — 19 hours ago

2026 acadia denali ultimate vs 2027 kia telluride hybrid x-line sx prestige

Howdy everyone, I am currently stuck between these 2 vehicles at the moment and wanted everyone's input. I know everyone might be biased to the GMC here but anyone's opinions on either car would be greatly appreciated. Thanks in advance!

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u/SUSpaceman67 — 2 days ago

Coolank leak notification from GMC for Acadia 2025

Received in mail a notification that GMC has identified a quality issue with the GMC Acadia C1-2 vehicles where coolant leaks from the radiator hose quick connect at the radiator inlet.
GM is offering a free replacement of the part of affected also reimbursing anyone who might have already replaced it at their own expense.
Has anyone come across this issue with their Acadias? How to spot this easily?

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u/justan0therh00man — 6 days ago