The TrailBlazer surname originated as a trim level because that the Blazer, in 1999. In 2002, the TrailBlazer came to be its own model, replacing all four-door Blazers, when two-door models kept the Blazer name. The 2005 TrailBlazer -- the critical year before it replaced the Blazer altogether -- had a 4.2-liter six-cylinder engine together standard and 5.3-liter V-8 engine as an obtainable option. Instead of the coolant temperature sensor on one of two people engine is a comparable process, with exception of the coolant refill procedure.

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Open the TrailBlazer"s hood, and remove the radiator cap. Progressive the front of the SUV, making use of a floor jack, and also position jack stands under its frame rails. Reduced the vehicle onto the jack stands.

Crawl in ~ the vehicle and find the lower radiator hose. Place a drain pan under wherein the reduced radiator hose connects come the radiator. Squeeze the ears on the reduced hose-to-radiator hose clamp with slip-joint pliers, and also slide the hose clamp about 6 inches toward the engine.

Pull the lower radiator water tap from the radiator carefully, and allow all of the coolant to drain from the radiator and the lower radiator water tap -- be prepared; the coolant will circulation out of the hose and radiator quickly.

Press the reduced hose earlier onto the radiator once all of the coolant has actually stopped draining into the pan. Use slip-joint pliers to relocate the water tap clamp to around 1 customs from the end of the radiator hose.

Raise the TrailBlazer off the jack stands, utilizing a floor jack, and remove the jack stands. Reduced the SUV to the ground.

Find the coolant temperature sensor on the former of the engine block, just behind the alternator. Pull increase on the locking tab top top the coolant temperature sensor"s wiring harness, and pull the wiring harness from the sensor.

Loosen the sensor, making use of a ratchet, 6-inch extension and also a 12-point socket. Eliminate the sensor the rest of the method by hand.

Apply a thin coat of thread sealer come the object on the brand-new coolant temperature sensor. Enable the sealer to cure because that the time specified by that instructions.

Hand-tighten the new coolant temperature sensor into the engine and tighten it come 15 foot-pounds, making use of a torque wrench, 6-inch extension and also 12-point socket. Plug the wiring harness right into the receptacle ~ above the brand-new sensor.

Add 50-50 premixed Dex-Cool coolant right into the radiator until it reaches the basic of the radiator"s filler neck. Open the coolant reservoir and include 50-50 premixed Dex-Cool coolant come it until the coolant level stays steady in ~ the "Full Cold" note on the reservoir.

Tighten the coolant reservoir cap and also the radiator cap. Start the TrailBlazer"s 4.2-liter engine and hold the engine"s idle at 2,000 come 2,500 rpm till the temperature gauge reads about halfway. Enable it to idle for about three minutes, then shut the engine off. Enable the engine to cool until it is cold to the touch and also check the coolant level in the coolant reservoir. Add 50-50 premixed coolant till the level get "Full Cold" on the reservoir. On the 5.3-liter V-8 engine, start the engine and hold at 3,000 rpm because that 30 seconds, then allow the engine to idle for 30 seconds -- repeat this cycle till the temperature gauge reads around halfway. Allow the engine to idle for around three minutes, climate shut the engine off. Permit the engine to collection until the is cool to the touch and verify the coolant level is in ~ the "Full Cold" selection on the reservoir. Add more 50-50 premixed Dex-Cool coolant as needed. The regular-length TrailBlazer with a 4.2-liter engine has actually a 2.7-gallon coolant capacity, and the extended-length version has 3.45-gallon coolant capacity. The regular-length TrailBlazer with a 5.3-liter has a 3.05-gallon coolant capacity, and the extended-length has actually a 3.82-gallon capacity.

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Take the old coolant to a offered automotive fluid recycling center for disposal. Part auto components stores take it old coolant free of charge.

"Mitchell1 OnDemand 5"; 2005 Chevrolet TrailBlazer Coolant Temperature Sensor Location; The Mitchell fix Information firm
Floor jack Jack was standing drainpipe pan Slip-joint pliers Ratchet 6-inch extension 12-point socket set object sealer talk wrench 3 to 4 gallons 50-50 premixed Dex-Cool coolant


Engine coolant is highly toxic, so store it far from animals and children.

Writer Bio

Justin Cupler is a professional writer who has actually been published on numerous websites consisting of CarsDirect and also Cupler has worked in the professional automotive repair ar as a technician and also a manager due to the fact that 2000. He has a certificate in transfer journalism indigenous the Connecticut college of Broadcasting. Cupler is at this time studying mechanical engineering at Saint Petersburg College.