This answer will vary with what's wrong and which shop looks at it.
A eaton fuller 18 speed roadranger gearbox is used
The 2003 Trailblazer speed sensor is mounted on the transmission. It is on the passenger side of the output end.
6.5 Liters
NO.
On a 2003 Chevy Trailblazer, the speed sensor is typically located on the transmission. Specifically, it can be found on the driver's side of the transmission case, near the output shaft. To access it, you may need to remove some components for better visibility and reach. Always refer to a repair manual for detailed instructions and safety precautions.
Dexron III Automatic Transmission Fluid
The fact that you ask the question tells me that like 99% of the people out there, you will need to take your car to a transmission professional for diagnosis and repair. Working on modern A/T is not a job for a novice.
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buy a haynes repair book at your local parts store it has detailed instrutions
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