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Any work under the hood of a car could be a technical process.

See related links for instructions.

ANS 2 You should take this opportunity to totally change the Transmission Fluid. To do this properly, first raise the front of the car about 1 foot, brace it up on blocks (I won't insult you by explaining simple stuff like that ) then disconnect the lower trans coolant line from the rad. Put a 5 gallon bucket under this line. now start and idle the engine in 'Park' . Fluid will slowly pump out into the bucket as the system empties. Takes 10-15 minutes. When no more fluid comes out, shut off engine and drop trans pan, remove and change filter and gasket, replace pan and bolt up carefully using opposing bolt method. Now disconnect both coolant lines from transmission and fit the new ones. When all is together, lower the car and pour in new fluid, EXACTLY the same amount as came out into the bucket. Have 2 litres spare fluid handy. Now switch on and idle the engine again, when engine/trans is warm measure fluid on the dipstick. Now add to recommended level on dipstick.

This method replaces the fluid from the convertor, that never normally gets changed when you just do the trans pan.

Now you've done a simple job that would have cost you 3-400 at the garage !

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Q: How do you change the cooler lines on a 2003 Chevrolet Trailblazer transmission?
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