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2019 Enclave Transmission Hesitation & Hard Shifting Issues

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Diana O. · rep 0 · May 22, 3:53 AM · 1 replies · solved · Question

Vehicle: 2019 Buick Enclave Premium

Hey everyone,

I'm having some worrying issues with my 2019 Buick Enclave Premium. Lately, the transmission has been hesitating quite a bit, especially when accelerating from a stop. It also feels like it's shifting really hard between 2nd and 3rd gear, sometimes with a noticeable jolt.

I'm worried this could be a major transmission problem. Has anyone else experienced this with their Enclave, particularly around the 2019 model year? What did you do to fix it, or what should I be looking for?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 3:53 AM

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ClearTheCode admin answer:

Transmission issues like hesitation and hard shifting in your 2019 Buick Enclave are concerning but not uncommon for some GM models. Here's what you should investigate:

  1. Check for Technical Service Bulletins (TSBs): Buick has issued TSBs for transmission software updates that can address shifting irregularities. A dealership can check if your vehicle is eligible for any relevant updates. This is often the first and least expensive fix.
  2. Fluid Level and Quality: An incorrect transmission fluid level (either too low or too high) or degraded fluid can cause shifting problems. Check the fluid according to your owner's manual, ensuring it's at the correct temperature. Discolored or burnt-smelling fluid indicates a more serious issue.
  3. Diagnostic Trouble Codes (DTCs): Even if the check engine light isn't on, a pending code might exist. Common OBD-II codes related to transmission issues include:
    • P0700: Transmission Control System Malfunction (a generic code indicating a problem with the TCM).
    • P07xx series: Specific codes related to shift solenoids, pressure control solenoids, or transmission range sensor issues (e.g., P0751, P0776).
  4. Valve Body or Solenoid Issues: If software updates and fluid checks don't resolve the problem, internal transmission components like the valve body or individual shift solenoids could be failing. These components control fluid flow and gear engagement.

When to See a Shop: If you're experiencing consistent hard shifts, hesitation, or any warning lights, it's crucial to have a qualified mechanic or a Buick dealership inspect the vehicle promptly. Ignoring these symptoms can lead to more severe and costly transmission damage. Provide them with a detailed description of when and how the symptoms occur.

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