Zieichy Knock Sensor Harness Intake Manifold Gasket Kit for Chevy Silverado 1500 2500 3500, for GMC Yukon XL 1500 2500, for Pontiac Firebird 12601822, 12589867

I was scared to use this when I got the box and it said that they were very possibly broken in transit. I tested them for proper resistance and voltage and they seemed ok. So I proceeded to do the almost 2 hours of work to get to the sensors and replaced them.At first they seemed ok, but within 5 days and my first real trip at highway speed the check engine came back on with the knock sensor code. I reset it and it works for awhile but eventually comes back on.They explain that they'll send you another set if they are defective but honestly I don't want to spend another 3+ hours installing this brand again. So I'll just wait.I'm still giving 3 stars because of the price and chance that they will work, plus the gaskets seemed to work. Also they refunded my order when notified that they were broken. So good seller not so great product.

Knock sensors worked perfectly, the gaskets are garbage

When I got to torquing them down the top of sensor came loose from bottom at about 12 to 13ft lbs. Than I couldn't get them out because they just spun. I ended up breaking off and removing valley plate to get studs out. Ordered OEM.

The problem is that they did not work. I had to pay to get it done twice.

Did not work. The Knock sensor light came back again after few days installing them. Very disappointing I have to pay mechanic again to reinstalled them.