Formula Auto Parts CTS1 Coolant Temperature Sensor

Best bang for the buck! Works very well, easy to install, value is also very good.

1999 k3500 gmt400 7.4.Would run good cold once warmed up ran horrible under even light acceleration.Looking at real time data on obdlink app saw it state 'open loop not warm enough for closed loop ' words to that effect.I knew that was wrong.NOTE this sensor is what ecu uses the gauge in the cluster has it's own sensor apparently gm is insane but ok.On my 7.4 this sensor is in the coolant crossover front and center of the engine.Took longer to find socket and extension than it did to swap part.This has thread sealant already applied to the threads.Runs like a new truck.Will it last a long time who knows I bought the cheapest one i could find to help confirm my diagnosis. If it falls later I'll get a Delco part or a part store unit with lifetime unit.It resolved the problem and truck is a joy to drive again so color me happy.

I can’t believe changing this sensor increased my mileage so much.

Item was received on time and as described by seller! However, I have not installed this item yet and therefore, I'm unable to complete it's review.Aj

I have a 1994 full-size blazer. Come to find out it has two temperature sensors! I got this one and I needed the other one! C’est la vie. It did fit perfectly though…….🤷‍♂️