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2017 Acadia 9-Speed Transmission Shifting Rough - Is this normal?

0

Christine P. · rep 0 · May 22, 3:48 AM · 1 replies · solved · Question

My 2017 GMC Acadia SLT with the 3.6L V6 and 9-speed automatic transmission has been acting a bit strange lately. I've noticed some pretty harsh shifts, especially when downshifting from 3rd to 2nd, and sometimes it feels like it hesitates before engaging a gear from a stop. It's got about 75,000 miles on it.

I'm wondering if this is a known issue with these transmissions or if I should be seriously concerned. I've heard some chatter online about TSBs for earlier models, but not sure if it applies to mine.

Has anyone else experienced similar problems with their 2017 Acadia? What was the fix, if any? Should I take it to the dealer or an independent shop?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 3:48 AM

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ClearTheCode guidance (Gmc · Buying & ownership)

Summary: For 2017 Acadia 9-Speed Transmission Shifting Rough - Is this normal?, 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 2017 GMC Acadia SLT with the 3.6L V6 and 9-speed automatic transmission has been acting a bit strange lately. I've noticed some pretty harsh shifts, especially when downshifting from 3rd to 2nd, and sometimes it feels like it hesitates before engaging a gear from a stop. It's got about 75,000 miles on it.

I'm wondering if this is a known issue with these transmissions or if I should be serious…

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

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