2017 Chevrolet Colorado

I purchased a new 2017 Chevrolet Colorado on XXX. On about XXX the truck started shuddering or not shifting correctly. I took my truck to the local dealer [XXX] GM. There the diagnosed the problem to be the torque converter. According to what they told me GM instructed them to drain and replace the transmission fluid. GM knew the 8-speed transmission had a design defect in the torque converter. The torque converter clutch fails to engage smoothly, creating the shudder vibration. A fluid flush treats the symptom, not the cause. GM was permitted to put a band aid on a problem to get the vehicle through any warranty and make it not their responsible. The vehicle was returned to me, even after I complained to the dealer that this was not fixing the problem. And the truck continued to have a pause in the shifting. On about XXX the shuddering became much more apparent. I made an appointment with this same dealer that had done all of my service. On about XXX they did confirm the the problem was the torque converter. At this point the truck was no longer under the warranty, so GM had succeeded in putting the replacement of the faulty torque converter on me the consumer. As a consumer I feel I have been failed by a system we have in place to protect consumers from dishonest Corporate transactions. This process cost me $4000.00 out of pocket, and 11 days without the use of my truck. All of this transpired, because GM decided to not do what was right and fix what they knew was defective. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11776398

Incident

Oct 20, 2026

Transmission fluid flushing. Hard gear shift at slow speeds. Transmission shudder at high speeds

NHTSA ID

11761125

Incident

Aug 30, 2026

See attached document for complaint.

NHTSA ID

11752571

Incident

May 6, 2026

The contact owns a 2017 Chevrolet Colorado. The contact stated that while driving at an undisclosed speed, the vehicle shuddered and vibrated abnormally. The vehicle was taken to the local dealer, and the contact was made aware of a technical service bulletin which included replacing the transmission fluid. The transmission fluid was replaced, and the vehicle was repaired. The contact stated that recently the transmission started slipping and the vehicle was taken to the local dealer to be diagnosed. The dealer determined that the transmission torque converter and the transmission valve body needed to be replaced. The vehicle was not yet repaired. The manufacturer was not contacted about the failure. The failure mileage was 39,200.

NHTSA ID

11751766

Incident

Dec 16, 2025

Mileage

39,200 mi

There is a major fuel line leak just before the high pressure fuel pump. It appears that the fuel line aggressively rubbed against an A/C line component (looks like a muffler/canister). This rubbing created a huge hole in the high pressure fuel line, causing diesel to spray everywhere on the driver side of the engine compartment. This causes a massive safety issue due to diesel fuel uncontrollably spraying onto hot engine components. In my own research, this seems to be a known problem for GM. I believe there is a TSB published for this exact problem, but I have yet to find the document online. This needs to be an official recalled item ASAP.

NHTSA ID

11748282

Incident

Jul 4, 2026

Thermostat is having problems. Fan runs over use and Thermostat will not open

NHTSA ID

11728434

Incident

Mar 31, 2026

On or about 02/09/2026, the vehicle experienced a catastrophic failure directly related to a known defect identified in Technical Service Bulletin 19-NA-066. The engine "sucked" in the oil filter due to a poor design on GM's part. The stand pipe was not present apparently, and must have broken off at some point. This bulletin acknowledges an issue affecting this vehicle platform. This should have been recalled to address this engineering flaw that GM acknowledged in their TSB. Despite multiple attempts and ongoing communication with authorized representatives to have the vehicles engine replaced under an extended warranty, the vehicle was inoperable and unusable, causing significant financial hardship. I owned the vehicle for approximately 5 months and had the vehicle in the shop multiple times for other repair issues that were known per forums from other owners of this model/year of vehicle. I have exhausted all reasonable efforts to resolve this matter through dealership, GM customer service channels, and GM's executive team without satisfactory resolution. As a direct result of this defect and resulting failure, I have incurred the following damages: Loss of use of the vehicle ($24,578 purchase price on 09/20/2025) Rental and alternative transportation expenses ($90.58 rental vehicle from 02/12/2026 - 02/14/2026) Diminished vehicle value ($24,578 - $12,000 (Selling Price) = $12,578) Out-of-pocket diagnostic and related expenses ($2,036.50) Total loss and seeking reimbursement: $14,705.08

NHTSA ID

11728202

Incident

Feb 9, 2026

On Wednesday, February 18th, I was driving on the freeway, usual heavy traffic right off of it at 5:00pm. When exiting and merging onto the street, I pressed on my break to slow down and meet the speed of traffic, but my breaks felt hard, I struggled pressing it down, and my car wasn’t slowing down. I was able to swerve off into a dirt patch next to the road. Then I panicked, unable to find where my emergency break was, I put my car in park and it eventually came to a stop. I then took the car to the dealership, and they’ve told me that the vacuum pump needs a replacement. The car has currently been at the dealership for a week and a half and there still seems to be no solution. I’ve reached out to General Motors and with the responses they’ve given me, it feels like they the know what’s going on but have thus far given me the run around. They say they’ve reached out to the dealership, but when I mention it to my dealership advisor, they say they haven’t heard anything.

NHTSA ID

11723086

Incident

Feb 18, 2026

This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3

This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.

This PI communicates the proper part numbers for transmission connectors and internal harness to prevent confusion when ordering

This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.

PI to help diagnose A/C concern

This PI provides diagnostic tips for diagnosing electric trailer brakes issues.