What are the most common GMC Acadia problems?

According to Au7o's analysis of 560+ owner reports, the 2025-2025 GMC Acadia has 1 documented issues. The most frequently reported are: 9T65 9-Speed Transmission Harsh Shifts and Hesitation. None are rated critical, but regular maintenance is recommended.

Is the GMC Acadia reliable?

The 2025-2025 GMC Acadia has 1 known issues documented across 560+ owner reports. No issues are rated critical, suggesting generally good reliability. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common GMC Acadia problems?

Repair costs for known GMC Acadia issues range from $0 to $3,500, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

2025 GMC Acadia Problems: 1 Issues Every Owner Should Know

2025 GMC Acadia Problems: 1 Issues Every Owner Should Know | Au7o

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Community Reported

560 owners

On the 2017-2025 GMC Acadia, the second-generation Acadia (2017+) uses the GM 9T65 9-speed automatic transmission which shares known issues with the Chevrolet Traverse and Blazer. Common complaints include harsh 1-2 upshifts, hesitation between 5-15 mph, lurching on light throttle in stop-and-go traffic, and the transmission hunting between gears on hills. GM has released multiple TCM calibration updates. The transmission is extremely sensitive to fluid condition — extended intervals with aging Dexron HP fluid contribute significantly to shift quality degradation.

This issue also affects: BMW M3, Cadillac Escalade, Cadillac XT5

Common Symptoms

Harsh or jerky 1-2 upshift between 5-15 mph
Hesitation when pulling away from a stop
Transmission hunting between gears on slight grades
Vibration or shudder during light acceleration
Delayed engagement from Park to Drive
Slip or flare on 2-3 shift under load

How to Fix

TCM recalibration with latest software (multiple revisions released). Full transmission fluid exchange with Dexron HP (ACDelco/GM 19354121) every 45,000 miles. Valve body and solenoid pack replacement (OEM 24043134) if software updates fail. Allow 500+ miles for relearn after any TCM reset.

What Owners Are Using

Parts and tips from 560+ owners who fixed this issue

TipTSB 20-NA-136 covers 9T65 harsh 1-2 shift on 2017-2021 Acadia. The first authorized repair step is a TCM calibration update via GDS2 — free under warranty and typically $100-150 at a dealer out of warranty. GM has released multiple calibration revisions; ask the dealer to confirm they are installing the most current software version, not just any available update. Calibration alone resolves ~65% of 9T65 shift complaints.
UpgradeACDelco/GM Dexron HP ATF (GM part 19354121) for 9T65 transmission — change every 45,000 miles despite the 'lifetime' fill designation. Dexron HP degrades significantly in stop-and-go use and extended intervals are a major contributor to 9T65 shift complaints. Pan-drop fluid change requires a 6mm hex drain plug tool; 9T65 has no traditional drain plug. A full exchange via cooler line requires approximately 9-10 quarts. (ACDelco #19354121)
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NoteIf 2017+ Acadia suddenly loses reverse or a forward gear, stop driving immediately — this indicates a missing check ball or solenoid failure within the valve body that causes hydraulic circuit loss. Continued driving rapidly destroys clutch packs. Report sudden gear loss to GM Customer Care (1-800-462-8782) and request escalation to field engineer review; documented repeat failures have received goodwill powertrain repairs on out-of-warranty vehicles.

Typical repair cost:$0 - $3,500

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Community Reported

High Confidence560 reportsLast reported by owners Feb 2026Reviewed Feb 2026

2025 GMC Acadia Problems: 1 Issues Every Owner Should Know

All 1 Known Issues

2017-2025 GMC Acadia: 9T65 9-Speed Transmission Harsh Shifts and Hesitation#