my GMC Sierra T1XX (2019-Present) has a delayed transmission response what to do

Learn how to diagnose and fix delayed transmission response in GMC Sierra T1XX (2019-Present). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts. Ensure the vehicle is on a level surface and the engine is off.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Check and Replace Transmission Fluid

• Sub-steps:
  1. Locate the transmission dipstick (if equipped) or drain plug.
  2. Remove the dipstick or drain plug to check fluid condition; if fluid is dark or burnt, proceed to change it.
  3. Using a wrench, drain the old transmission fluid into a suitable container.
  4. Replace the transmission filter if applicable (follow specific instructions for your model).
  5. Refill the transmission with the appropriate type and amount of new transmission fluid (consult owner's manual for specifications).

3. Inspect and Test Transmission Solenoids

• Sub-steps:
  1. Remove necessary components to access the transmission solenoids (consult repair manual).
  2. Using a multimeter, test each solenoid for resistance (refer to specifications for acceptable values).
  3. Replace any faulty solenoids with new ones.

4. Update Transmission Control Module

• Sub-steps:
  1. Connect an OBD-II scanner capable of programming or updates to the vehicle.
  2. Follow the scanner instructions to check for available software updates for the TCM.
  3. If an update is available, follow the prompts to complete the update.

5. Reconnect Battery and Test Drive

• Sub-steps:
  1. Reconnect the negative battery terminal.
  2. Start the engine and allow it to reach operating temperature.
  3. Test drive the vehicle to ensure the transmission shifts smoothly and responds correctly.