Two problems related to o2 sensor have been reported for the 2005 Chevrolet Trailblazer. The most recently reported issues are listed below.
The contact owns a 2005 Chevrolet Trailblazer. The contact stated that while driving at approximately 45 mph, the check engine warning indicator illuminated and the vehicle stalled afterwards. After approximately two minutes, the vehicle started normally. The vehicle was driven to the dealer and the diagnosis was that the abs sensor, the oxygen sensor, the brake pads, the cluster module and the fuel sender lever had to be replaced. The vehicle was being repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 178,000. The VIN was not available.
I bought a 2005 Trailblazer in 2006. There was alot of hissing from the speakers, which they replaced but it never fixed the problem. I already fixed the oxygen sensor and now I notice the lights go dim and bright and it seems to lose power. It only has 36,000 miles on it. Everytime I bring it in it doesn't happen so no one knows what it is. I have 2 small kids and it's cold in wisconsin so if it ever dies in the middle of the country who knows what could happen.