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Drivers want a smooth, comfortable ride as they head down the road. The transmission is responsible for providing a well-balanced shifting experience that someone can barely notice occurring. That isn’t what Colorado owners have come to find about their mid-size truck. The actual experience brings vibration and plenty of noise.
One driver posted this on Edmunds, “I purchased 2018 Colorado new at champion Chevrolet Johnson City TN and at 2,000 miles transmission developed a vibration in transmission most of the time.I returned to the dealership for repairs and tech. said he could not find anything wrong and since the check engine light was not on there was nothing wrong with the transmission. I left and it vibrated all the way home. At 5,000 miles it appears to be getting worse, I have an appt. at another dealership this time. Tarr Chevrolet in Jefferson City,TN. Changed the fluid in the transmission and this resolved the problem. I also found a service tech,notice concerning this problem which has been ongoing for a few years but apparently, Champion Chevrolet in Johnson City has no knowledge of this problem or does not care about their customers.”
Interestingly, the dealerships, in this case, don’t know what the problem is considering GM has addressed it directly. In Service Bulletin #PIE0405A, the automaker acknowledges that customers experience a shake or shudder while driving with the 8L90 or 8L45 transmission.
Not only do they recognize the torque converter shudder, but they also released Service Bulletin #PIP3366C which refers to a grinding or ratcheting noise when shifting into Park. All in all, it seems there are plenty of powertrain noises to go around with the Colorado. For someone that doesn’t expect them, these sounds could become quite alarming, or you could just crank up the radio and forget about it.
Here are some actual complaints logged with the NHTSA about the 2018 Chevrolet Colorado Transmission Problems:
TL* THE CONTACT OWNS A 2018 CHEVROLET COLORADO. WHILE APPROACHING A STOP, THE VEHICLE DOWNSHIFTED WITHOUT WARNING. THE FAILURE OCCURRED INTERMITTENTLY. BOB HOOK CHEVROLET (4144 BARDSTOWN RD, LOUISVILLE, KY 40218, (844) 212-4818) DIAGNOSED AND REPAIRED THE TORQUE CONVERTER AND CHANGED THE FLUID, BUT THE FAILURE PERSISTED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 15,000.
WHEN THE TRUCK IS PUT IN AUTO 4WD MODE WHILE PARKED, INSTEAD OF THE 4WD ENGAGING AS NECESSARY, IT ENGAGES IMMEDIATELY UPON MOTION. THIS MAKES THE AUTO 4WD OPTION OBSOLETE.THIS WAS FIRST NOTICED WHEN I USED 4WD AUTO MODE FOR THE FIRST TIME IN OCTOBER 2018. I’VE NOTIFIED THE DEALER BUT THEY DON’T SEEM TO THINK ANYTHING IS WRONG OR NOT FUNCTIONING PROPERLY.
2018 CHEVROLET COLORADO SHAKING AND SHUTTERING VIOLENTLY WHILE DRVING. EXTREMELY DANGEROUS. CHEVROLET IS NOT LISTENING TO ALL THE COMPLAINTS. ARE THEY WAITING ON A DANGEROUS DEADLY ACCIDENT BEFORE THEY ACKNOWLEDGE AND RECALL THE VEHICLE AND REPAIR THIS DANGEROUS SITUATION!
There are several engine options available on the 2018 Chevrolet Colorado. While there seem to be minor issues with them all, the most noticeable giving trouble is the diesel option. Most owners choose this lineup for the towing and capability, but they actually receive more than they bargained for.
One Edmunds reviewer said, “Owned the truck less than 24 hours and the DEF sensors tripped. 18 month of ownership, 18 trips to the dealer. When the system is operating properly, this is a great riding /towing package. When the sensors ‘trip,’ you have 100 miles until the power is reduced. Dealer has replaced, re-programmed, nothing works long term.”
GM Service Bulletin #PIP5370C addresses this concern and some others as well. The customer could notice an exhaust fluid quality poor message on the Driver Information Center or see the diesel exhaust fluid warning lamp as well. The automaker’s fix for this situation is to inspect the “diesel exhaust fluid (DEF) system and its components.” That’s it. There is no root cause or long-term remedy, so it looks like it’s something drivers have to live with.
When you purchase a diesel truck, you expect a workhorse. Instead, Colorado owners seem to have acquired a lame horse instead.
Here are some actual complaints logged with the NHTSA about the 2018 Chevrolet Colorado Engine Problems:
I HAVE A 2018 CHEVROLET COLORADO LT 4WD CREW CAB. MULTIPLE TIMES ON A COLD START THE ENGINE IS MISFIRING. THE CHECK ENGINE LIKE COMES ON, THE VSA, AND T/C LIGHTS ALL COME ON AND A NOTIFICATION ON THE DASH SAYING STABILITRAK IS DISABLED. THE VEHICLE SHAKES TERRIBLY. THE CHECK ENGINE LIGHT WILL FLASH AND THEN GO SOLID. I AM AN AUTOMOTIVE TECHNICIAN. I KNOW THAT A MISFIRE SHOULD SET A HARD DTC. WHEN THE VEHICLE IS TURNED OFF AND STARTED SEVERAL HOURS LATER THERE IS NO CHECK ENGINE LIGHT OR ANY OTHER LIGHT ON. THE DEALERSHIP IN MARYSVILLE, OH HAD MY TRUCK FOR 3 DAYS AND TOLD ME THEY CLEANED A BUNCH OF TERMINALS AT SEVERAL CONNECTORS. WHATEVER THAT IS SUPPOSED TO DO. THEY SAID THEY STARTED THE VEHICLE SEVERAL TIMES AFTER AND EVERYTHING WAS GOOD. THE NEXT DAY AFTER I PICKED THE TRUCK UP, IT DID THE SAME EXACT THING! EXTREMELY FRUSTRATING! I KNOW A CONTINUOUS MISFIRE LET’S UNBURNED FUEL INTO THE CATALYTIC CONVERTER WHICH LEADS TO PREMATURE BREAKDOWN OF THE CATALYST. SO MY QUESTION IS WHAT IS BEING DONE ABOUT THESE ISSUES?
WHILE DRIVING HOME, YELLOW CHECK ENGINE LIGHT CAME ON & I NOTICED REDUCTION OF OIL PRESSURE. PARKED IN DRIVEWAY, SHUT OFF ENGINE, WENT INSIDE. UPON RETURNING, NOTICED SIGNIFICANT AMOUNT OF OIL ON DRIVEWAY. DIPSTICK SHOWED NO OIL. TOWED TO DEALERSHIP. THEY VERIFIED LEAKING CAME FROM DEFECTIVE OIL COOLER LINE HOSE. WAITED SEVERAL DAYS FOR REPLACEMENT PART. THIS IS A NEW 2018 COLORADO Z71 WITH ONLY 5K MILES ON ENGINE. AND, THIS IS A SYSTEMIC PROBLEM THAT GM HAS KNOWN ABOUT SINCE ’15 AND IMPACTS BOTH COLORADO AND CANYON MODELS (THERE ARE SEVERAL COMPLAINTS ON WEB). THIS IS A DANGEROUS PROBLEM AND SHOULD BE INVESTIGATED BEFORE SOMEONE GETS HURT. IT WAS NOT A SLOW LEAK. OBVIOUSLY, IT IS MANUFACTURING PROBLEM. ADDITIONAL INFORMATION (INVOICE AND PICTURES) AVAILABLE UPON REQUEST.
While some electrical systems of the truck are for valuable system operations, other systems are for creature comforts and amenities. It doesn’t matter which one of these is faulty; it becomes a significant inconvenience to the owner.
One driver on Edmunds has several complaints about comfort and technologies. They said, “Drove one for five days and after those five days, I could hardly walk. The seats are the most uncomfortable I’ve ever been in. The infotainment system continually dropped the connections and wasn’t at all dependable.”
Interestingly, they have several Service Bulletins regarding an intermittent blank or flickering Driver Information Center. Both Service Bulletin #18-NA-266 and PIC6333B tell the technicians to check the software for updates. Other than that, there are no known fixes available at this time.
While it’s a good thing that these electrical shortages aren’t related to necessary equipment, no one wants to deal with this inconvenience either. With no fix in sight, it can quickly become annoying and distracting to the driver, which could potentially lead to an accident. You could make the best of the situation and pretend it is a strobe light jamming to your favorite tunes, but we don’t recommend turning your truck into a disco just yet.
Here are some actual complaints logged with the NHTSA about the 2018 Chevrolet Colorado Electrical Problems.
TL* THE CONTACT OWNS A 2018 CHEVROLET COLORADO. THE CONTACT STATED THAT THE DIMMER SWITCH DID NOT ACTIVATE WHEN THE VEHICLE WAS IN MOTION. THE CONTACT STATED THAT THE INTERIOR LIGHTING WAS BRIGHT AND IMPAIRED HIS VISION WHILE DRIVING AT NIGHT. IN THE DAYTIME, THE LIGHTS ON THE INSTRUMENT PANEL WERE TOO DIM AND PREVENTED THE CONTACT FROM SEEING THE INSTRUMENT PANEL DISPLAY. THE VEHICLE WAS TAKEN TO BRUCE CHEVROLET (1084 SW OAK ST, HILLSBORO, OR 97123, (503) 388-4240) WHERE IT WAS DIAGNOSED THAT THE DIMMER LIGHTS FAILED DUE TO A SHORT IN THE COMPUTER SYSTEM. THE MANUFACTURER WAS NOTIFIED AND DID NOT ASSIST. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 50.
THE DISPLAY FOR THE BACKUP CAMERA IS ON AT FULL BRIGHTNESS. THERE IS A CONTROL KNOB TO DIM THE INTERIOR LIGHTING AND DISPLAY, BUT WHEN THE VEHICLE IS PUT INTO REVERSE, THE DISPLAY GOES TO FULL BRIGHTNESS AND CANNOT BE CONTROLLED BY THE BRIGHTNESS CONTROL KNOB. AT NIGHT, THE PASSENGER SIDE MIRROR IS NOT USEABLE SINCE THE BACKUP DISPLAY IS SO BRIGHT. THIS ALMOST RESULTED IN ACCIDENTS WHEN BACKING UP INTO A PARKING SPOT.
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