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Home/Cars/GMC/Sierra/T1XX (2019-Present)/how to check the transmission fluid level in GMC Sierra T1XX (2019-Present)?

how to check the transmission fluid level in GMC Sierra T1XX (2019-Present)?

GMC Sierra T1XX (2019-Present)

Error Codes
Severity: mediumDifficulty: medium15-30 minutes
2 min read
372 words

Problem Statement

Learn how to check the transmission fluid level in GMC Sierra T1XX (2019-Present). Step-by-step guide with symptoms, diagnostic steps, and safety warnings.

Affected Component
Transmission
Estimated Time
15-30 minutes

Safety Warnings

  • ⚠Ensure the engine is running during the fluid level check to get an accurate reading.
  • ⚠Be careful of hot engine components and fluids.

Symptoms

  • •Transmission slipping during gear shifts
  • •Delayed engagement when shifting into gear
  • •Warning light for transmission fluid level
  • •Unusual noises from the transmission
  • •Poor acceleration

Diagnostic Steps

  1. 1Park the vehicle on a level surface and engage the parking brake.
  2. 2Start the engine and allow it to reach normal operating temperature.
  3. 3With the engine running, shift the transmission through all gear positions (P, R, N, D) and back to Park.
  4. 4Locate the transmission dipstick or fill port (depending on configuration).
  5. 5Remove the dipstick, clean it with a lint-free cloth, and reinsert it fully.
  6. 6Remove the dipstick again and check the fluid level against the markings on the dipstick.

Solution

Solution

1. Preparation

  • Gather necessary tools: a lint-free cloth and a funnel if adding fluid.
  • Ensure the vehicle is on a level surface and the engine is warmed up.

2. Locate and Remove Dipstick

  • Open the hood and locate the transmission dipstick (usually near the back of the engine).
  • Pull the dipstick out gently, avoiding any spills.

3. Check Fluid Level

  • Wipe the dipstick clean with a lint-free cloth.
  • Insert the dipstick back into the tube completely, then remove it again to check the fluid level.
  • The fluid should be within the "Full" and "Add" marks on the dipstick.

4. Add Fluid (if necessary)

  • If the fluid level is low, place a funnel into the dipstick tube.
  • Add the recommended transmission fluid (consult the owner’s manual for specifications).
  • Add fluid gradually, checking the level frequently to avoid overfilling.

5. Reinsert Dipstick

  • Once the fluid level is correct, reinsert the dipstick fully back into the tube.
  • Ensure the dipstick is secured properly.

Tools Required:

  • Lint-free cloth
  • Funnel (if adding fluid)

Parts Required:

  • GM-approved transmission fluid (consult the owner’s manual for specific type)

Estimated Repair Time: 15-30 minutes

Safety Warnings:

  • Ensure the engine is running during the fluid level check to get an accurate reading.
  • Be careful of hot engine components and fluids.

Verification

After completing the repair, verify that the issue has been resolved:

  • ✓Test the affected component to ensure it functions correctly
  • ✓Check for any error codes or warning lights
  • ✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • •Lint-free cloth
  • •Funnel

Parts Required

  • •GM-approved transmission fluid

Additional Information

Affected Component
Transmission
Estimated Time
15-30 minutes
Difficulty
medium
Severity
medium
Tools Required
2 items
Parts Required
1 item

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