2018 Chevrolet Colorado Fuel System Problems

While driving, your vehicle suddenly lost power and you heard a high-pitched sound from the engine. The check engine light came on, and the vehicle wouldn't restart. A dealer found that the high-pressure fuel pump had cracked and there was a fractured bolt in the cylinder head, both of which were replaced. This happened at 90,369 miles.

While driving your truck with windows closed, you smelled strong gasoline fumes entering the cab. You stopped immediately and saw flames coming from under the bed near the left rear wheel, which then spread to the gas tank, creating a significant fire. The Fire Department and insurance company determined the truck was a total loss. This may be related to a known issue where the high-pressure fuel pump can detach from its mounting, potentially damaging the fuel line and causing a leak. Repair would involve replacing the high-pressure fuel pump and fuel line.

Your truck's fuel injector fuse (7.5 amp) has blown twice for unknown reasons, causing a loss of power while driving—once on a country road and once on a highway. Other owners of 2018 Chevrolet Colorados with the 2.8L engine report this as a recurring issue. The fix will likely involve replacing the blown fuse and diagnosing the underlying electrical problem causing the fuse to fail repeatedly, which could be a faulty fuel injector, wiring issue, or engine control module problem.

You noticed gasoline leaking from underneath your truck near the fuel filler neck area. Your dealer diagnosed a failed fuel pump seal as the cause. This type of leak should be repaired promptly to prevent fuel loss and potential safety issues. The repair will likely involve replacing the fuel pump seal or the entire fuel pump assembly.

I detected the smell of fuel while the vehicle when it was both not running and running. I brought the truck to Banks Chevrolet in Concord NH. The high pressure fuel pump detached from its mounting flange, resulting in damage to the attaching high pressure fuel pipe causing a constant fuel leak. Dealer replaced the high pressure fuel pump and high pressure fuel pipe to resolve the concern. There is a NHTSA recall that my vehicle should have been included in, 18V358000. The GM recall number is 18188. I paid out of pocket (~$1500) to fix this safety issue when it should have been fixed initially with the recall.

The flapper just inside the fuel filler pipe has broken loose, allowing water or dust to enter, potentially causing engine failure.

The contact owns a 2018 Chevrolet Colorado. The contact stated while driving 30-35 MPH, the contact smelled an abnormally strong fuel odor. The odor became more intense while driving. The contact stated upon arriving at the residence, the fuel gauge indicated that the fuel tank was empty. Additionally, the contact noticed a puddle of gasoline underneath the vehicle. There was no warning light illuminated. The vehicle was towed to the dealer, who informed the contact that the failure could be related to the fuel pump. The vehicle was not diagnosed nor repaired. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 52,000.

I along with other people who own this model of truck with the diesel engine around 60,000 to 70,000 Miles have part number 55488542 which is the fuel feed line that rubs up against the AC line and starts to leak fuel. https://www.coloradofans.com/threads/2016-diesel-canyon-severe-fuel-leak.410108/ I along with others have numerous complaints to the Chevy dealership they said this is a common issue because of the type of line that was used and placement that it rubs up and down and since it's a diesel and vibrates a lot and basically the hose is going against the AC Muffler which is a canister and rubs it until there is a hole from rubbing. The link I added to this is one of many. This is dangerous it is fuel it is pouring out and it is in contact with hot parts of the engine

DURING SOME STARTS (IN MORNING AFTER NOT DRIVING FOR SEVERAL HOURS), THE ENGINE WILL HAVE A PULSING IDLE ~750-1000 RPM. AFTER LETTING IT SIT FOR A MINUTE TO WARM UP, I DRIVE DOWN THE ROAD. IF I AM ABLE TO DRIVE WITHOUT STOPPING, THERE WILL BE NO ISSUES. HOWEVER, IF I COME TO A STOP WITHIN 0.5 MILES OR SO, THE ENGINE WILL SHUT OFF. WHEN I TRY AND RESTART, THE ENGINE WILL STALL REPEATEDLY. THE ENGINE WILL EVENTUALLY RESTART. THERE HAVE BEEN NO CODES PRODUCED NOR ANY LIGHTS ON THE DASH BOARD. HAS HAPPENED SEVERAL TIMES.