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Transmission Fluid Level Check on 2019 Silverado

oilfieldtrash73
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oilfieldtrash73 Enthusiast

oilfieldtrash73

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I have driven GM products for 17 years. Not looking for a debate on the removal of the transmission dipstick by GM. Just the procedure on how to actually check the fluid level on the 2019 new generation 5.3L, 8 speed, transmission. (i.e. the required transmission temp and perhaps a step by step on doing it) One question, if a sure cool thermostat bypass is installed can you just check it at normal operating temp? In other words, if the bypass is installed you shouldn't have to wait on a certain temperature for the transmission thermostat to open to check the fluid level? I'm looking to go to Amsoil trans fluid but need to know how to make sure the level is correct when I am done. Thanks for all help in advance

Gangly Senior Enthusiast

Gangly

Posted
Posted
Caution: The transmission fluid level must be checked when the transmission fluid temperature (TFT) is between 30–50°C (86–122°F). If the TFT is not within this range, operate the vehicle or allow the fluid to cool as required. Setting the fluid level with a TFT outside this range will result in either an under or over-filled transmission. TFT>50°C=under-filled, TFT<30°C=over-filled. An under-filled transmission will cause premature component wear or damage. An over-filled transmission will cause fluid to discharge out the vent tube, fluid foaming, or pump cavitation.
 
Caution: THE ENGINE MUST BE RUNNING when the trans oil level check plug is removed or excessive fluid loss will occur, resulting in an under-filled condition. An under-filled transmission will cause premature component wear or damage.
 
Note: Continue to monitor the TFT. If the TFT is not within the specified values, reinstall the trans oil level check plug and repeat the previous steps.
Caution: Refer to Fastener Caution.
  1. Observe the TFT using the driver information center (DIC) or a scan tool.
  2. Start and idle the engine.
  3. Depress the brake pedal and move the shift lever through each gear range. Pause for at least 3 seconds in each range. Move the shift lever back to PARK. Ensure the engine RPM is low (500–800 RPM).
  4. Allow the engine to idle for at least 1 minute.
  5. Raise the vehicle on a hoist. The vehicle must be level, with the engine running and the shift lever in the PARK range.
  6. Remove the trans oil level check plug (1) from the transmission fluid pan. Allow any fluid (2) to drain.  
    • If the fluid is flowing as a steady stream, wait until the fluid begins to drip.
    • If no fluid comes out, add fluid until fluid drips out. Refer to Transmission Fluid Fill Procedure.
  7. Inspect the fluid color. The fluid should be red or dark brown.
    • If the fluid color is very dark or black and has a burnt odor, inspect the fluid and inside of the bottom pan for excessive metal particles or other debris. A small amount of “friction” material in the bottom pan is a “normal” condition. If large pieces and/or metal particles are noted in the fluid or bottom pan, flush the oil cooler and cooler lines and overhaul the transmission. If there are no signs of transmission internal damage noted, replace the fluid filter assembly, repair the oil cooler, and flush the cooler lines.
    • Fluid that is cloudy or milky or appears to be contaminated with water indicates engine coolant or water contamination. Refer to Engine Coolant/Water in Transmission.
  8. Replace the transmission oil level check plug and tighten.
    • M6 oil level check plug 9 Nm (80 lb in)
    • M12 oil level check plug 25 Nm (18 lb ft)
  9. Inspect for external leaks. Refer to Fluid Leak Diagnosis.
  10. Reset the oil life monitor only if the fluid was changed.
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