2018 GMC Sierra 1500 · symptom sheet

Transmission jerks, lurches or bangs into gear

26owner reports
27,000median miles
1involved a crash

Newest report Sep 6, 2026 · checked Oct 2, 2026

26 of the 68 reports of transmission shudder on the 2018 Sierra 1500 describe jerking or hard shifts.

Part of Transmission shudders, slips or shifts hard (68 reports)

No recall on this systemas of Oct 2, 2026

1 crashin 26 reports

Tick what matches of 26 reports

bangs or clunks into gear

jerks or lurches when shifting

a dealer did a software update

it nearly caused an accident

fluid was changed or flushed

Jerking or hard shifts on other Sierra 1500 years

201628 reports 201733 reports 201826 reports 201932 reports

Report counts are for each model year on its own, so a newer car has had less time to collect them. Model years with too few reports of it for a sheet: 2014, 2015, 2020, 2021, 2022, 2023, 2024, 2025, 2026.

What this problem usually is

This is the narrower sheet inside transmission shudder for shifts that jerk, lurch or bang. Where the wider sheet also takes in slipping and vibration, these reports are about a shift that arrives too hard: the car lunges forward, or a clunk comes through the floor as it drops into gear.

Read the full explainer · Which cars report it most

What got replaced

Few of these reports name the part that was replaced.

Recalls and investigations

No recall on the transmission and drivetrain covers the 2018 model year as of Oct 2, 2026.

When it happens

The middle half of failures fell between 10,000 and 60,000 miles, from the 19 reports that gave a mileage.

Is this a known problem?

The manufacturer has sent NHTSA 4 service bulletins or notices for the 2018 GMC Sierra 1500 that deal with this problem. Newest first.

Federal rules make a manufacturer send NHTSA a copy of any notice about a defect that goes to more than one dealer or owner. Most of these are service bulletins, the repair instructions manufacturers send to dealers. NHTSA generally leaves safety recall bulletins out of this file, and recalls are listed separately.

Service bulletin08-07-30-026ISep 16, 2024
This service bulletin provides information on some vehicles that may rock or move slightly forward or rearward while in Park at start up after cold soak. This condition may be accompanied by a clunk noise.
Service bulletin99-04-20-002OJul 9, 2024
This service bulletin provides information on Driveline Clunk Noise and what is acceptable and what is considered normal operation.
Service bulletin990420002KOct 29, 2019
This informational bulletin provides information on Driveline Clunk Noise and what is acceptable and what is considered normal operations.
Service bulletin080730026EDec 12, 2017
This informational bulletin provides information on Some vehicles may rock or move slightly forward or rearward while in Park at start up after cold soak. This condition may be accompanied by a clunk noise.

What owners wrote

“Automatic Transmission not shifting properly unable to accelerate bangs gears while shifting noises from the transmission not reported no warning lamps”
Filed Sep 1, 2026

Should you keep driving it?

This page can't tell you that. 1 of 26 reports involved a crash. Owners who file are the ones who had a bad experience, and nobody checks their reports. If the problem affects steering, braking, power or a fire risk, treat it as a safety fault and have it inspected before a long or high-speed drive.

File your own report with NHTSA. Complaint counts are how a problem gets an investigation. How reports land on this sheet.

Guide Taking it to a shop? How to describe this problem so it gets found