Review on ACDelco 213 1702 Original Equipment Heated by Chris Long

I ordered four Delco O2 AC sensors for my 2004 Silverado. I didn't have any warning lights, just decided it was time to change them at 150,000 miles. When I received the sensors, the box said AC Delco, but the sensors were marked Denso. I don't know why but when I took the originals off the truck it said Denso too. I had a hard time getting the old ones off, but I bought an O2 sensor key and sprayed the old ones with liquid key for a few days. I also used a 12" pipe extension and they fitted right away. It took me about 1 hour and 30 minutes to do the job myself as I had a small disconnection issue on both row 1 sensor connectors. I've had them for about 4 days now and they're working great so far. They fit perfectly, they were the right size and length. Smoother idle, better starts, smoother gear changes, no more dripping water out of the exhaust/muffler and call me crazy for some reason but my AC is blowing non-stop now. My A/C would occasionally turn on and off at idle and let off steam for a few seconds. When the truck drove on the highway everything was fine, no problems. I don't know why, but it hasn't happened since I swapped the O2 sensors. I will update if anything changes over the next few months.