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2018 Sierra 1500 Transmission Shudder - Time for Fluid Change?

0

Melissa G. · rep 0 · May 22, 3:45 AM · 1 replies · solved · Question

My 2018 GMC Sierra 1500 SLT, with about 85,000 miles, has developed a noticeable shudder, especially when accelerating gently between 40-60 mph. I've heard this can be related to the transmission fluid. Is it time for a fluid and filter change, or could it be something else?

I'm trying to avoid a costly repair if it's just maintenance. The truck shifts fine otherwise, but this shudder is becoming more frequent and concerning.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 3:45 AM

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ClearTheCode guidance (Gmc · Maintenance & DIY)

Summary: For 2018 Sierra 1500 Transmission Shudder - Time for Fluid Change?, work through these steps on your 2016+ vehicle:

  1. Confirm the symptom — note when it happens (cold start, highway, after fuel fill, etc.).
  2. Scan codes — save all pending/stored DTCs; don't clear until you've recorded them.
  3. Check TSBs & recalls — look up your VIN for open campaigns and known fixes.
  4. Inspect the obvious — related fuses, connectors, fluid level, and recent repairs.
  5. Test the common fix — follow model-specific service procedures; one change at a time.
  6. Escalate if needed — burning smell, no brakes, overheating, or stalling in traffic → shop visit.

Owner reported: My 2018 GMC Sierra 1500 SLT, with about 85,000 miles, has developed a noticeable shudder, especially when accelerating gently between 40-60 mph. I've heard this can be related to the transmission fluid. Is it time for a fluid and filter change, or could it be something else?

I'm trying to avoid a costly repair if it's just maintenance. The truck shifts fine otherwise, but this shudder is becoming…

This is educational guidance, not a substitute for hands-on diagnosis.

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