2018 Chevrolet Colorado

For at least 6 months now My ignition key goes in and starts normally. When parked the key goes back one notch and freezes. Cannot pull it out or put back to off position. This is sporadic. Have been to 2 Chevrolet dealers who simply stated they cannot duplicate the issue so they don't want to throw parts at it. On you tube there are many videos of how people are handling this.. If I had a emergency run to a hospital or something of a time constraint I cannot do it because i am stuck for at least a half hour until it moves again. Now about $280.00 into diagnostic fees that Chevrolet claims they know nothing about so they are doing nothing. Imagine that click the key 5 or 6 times video it and then say cannot duplicate the problem. I hope this leads to someone acknowledging an issue. Thanks

The contact owns a 2018 Chevrolet Colorado. The contact stated while driving 40-60 MPH, the vehicle would shudder while depressing the accelerator pedal. There was no warning light illuminated. The contact stated that she was able to continue driving. The vehicle was taken to an independent mechanic, where it was test driven and diagnosed with transmission failure. The mechanic referred the contact to the dealer. The vehicle was then taken to the dealer, where the transmission fluid was flushed and replaced with HD transmission fluid per GM Technical Service Bulletin Number: 18-NA-355. The dealer then advised the contact to drive 500-1,000 miles to allow the new HD transmission fluid to circulate the transmission. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 22,589.

I have a 2018 Colorado 4x4 with 51K miles. Purchased with 28k. When driving at normal highway speed, get drive train shudder when increase torque is needed (hill, ramp, etc.). Only happens in overdrive. When tow/haul is activated shudder does not occur. It feels like transmission and/or drive shaft is about to fall off. I have not attempted repair due to numerous concerns voiced on this site and class action lawsuit now in progress. No warning lights or messages.

Seat belt buckle receiver occasionally does not “click” all the way and takes at times multiple attempts to connect. No light shows that it is disconnected. I’ve noticed it with both front seat belts receiver. Unknown with rear seats I’ve never sat in my vehicles backseats to confirm it there. Unknown if I can get them inspected upon request at my local dealer as they have not been the best with customer service. Seat belt not working correctly doesn’t give me confidence in it in the event of a collision. Unknown if reproduced No inspection has been conducted as of the time of this report. Will move to get that done asap.

We reported issues with our thermostat to our dealer back in September of 2022. The vehicle would not defrost or heat. We were then told the thermostat required replacements but there was no part in existence and they would notify us when it became available. After following up numerous times with no actionable timeline from the dealer we consulted with a secondary mechanic who confirmed the issue was related to a thermostat sensor malfunction and would require a replacement thermostat. Again we were told that the item was not available from GM and we would be contacted when more information was available. A SPAC case was created by our dealer in October of 2022, notifying the system of the urgent need and our dealer has followed up numerous times that GM has not provided any timeline for replacement. I have also filed a separate claim in January of 2023 to GM customer service notifying them of the ongoing issue and escalating to upper management. I have not heard back on mitigation or rectification plan for our issue. This ongoing issue is a major safety concern that has rendered my vehicle unfit for operation. I am unsure why GM is not making this major safety concern a priority because we are now in the middle of a Chicago winter we’re temperatures are regularly below freezing. I cannot defrost my windows or maintain a safe cabin temperature. This is unsafe for me to operate let alone use the vehicle to transport my child because of the immediate danger it would place her and I in. I am now paying for a vehicle that has sat inoperable in my driveway for 4+ months with no end in site and opening is up to additional damages because it has had to remain inoperable for an extended period of time.

when traveling at any speed usually between 1200-2200 RPM there is a rumble strip/ vibration feeling coming from the vehicle most notably around 35-45 MPH but happens at all speeds. I took it to my local mechanic and it was not a suspension, tire or drive shaft issue. i was informed it seems to be coming from the transmission. upon looking on other forums about this issue it seems to be a common problem with the 8 speed transmissions on the Colorado's. i still have been unable to fix this issue. No indicator lights are on, engine runs fine its only when traveling when the engine is between 1200-2200 RPM

A/c lines near driver side wheel well has chafed through fuel line and wire harness.Causing a couple thousand dollars in damage.Nor warning indicators leading up to either incidents. My chevy dealership mis diagnosed it twice and has now found the issue. Fuel lines leak can cause fires and as far as the electrical issue I've been left stranded with my 3 year old daughter a couple of times..Have looked up forums and many people have had the same issue.