2020 Chevrolet ColoradoRecalls, problems, MPG & safety

“My 2020 Colorado at 14k miles, the dealer did the transmission oil flush and it helped till the warranty ran out. Now I have the same problem again at 32k miles. I bought the truck because GM said the problem with 8L/45 trans was fixed in 2019. To my knowledge there has been no update to the slipping clutch in GM's torque convertor. If I were to replace the convertor with another one just like it I could have the same problem. My Dealer ([XXX])says my lifetime warranty (that I got with my new Colorado) doesn't cover the transmission? And that if they do another $600 oil flush they don't guarantee it will fix anything. I think when the flush is done, they don't change the trans filter. I'm sure the clutch particles that are left behind after the flush are probably stopping up the filter. I just replaced the DOD/AFM cam and lifters in my GM car's 6.2 liter. It's a shame that manufacture's can get away with these kind of problems. Thanks, [XXX]”

“2020 Chevrolet Colorado 2.5L, approximately 81,500 miles. I experienced a sudden loss of power brake assist. There was no warning noise associated with the failure; the brake pedal became extremely hard and required substantially greater pedal pressure to stop the vehicle. The vehicle was inspected by an independent professional mechanic. Inspection found that the brake booster vacuum pump itself was not the primary source of the failure. The failure was at the engine exhaust camshaft interface that mechanically drives the vacuum pump. The camshaft drive was damaged and no longer properly operated the vacuum pump, resulting in loss of brake vacuum assist. This is not normal brake-pad or rotor wear. The hydraulic brakes remained functional, but without the vacuum assist the pedal effort increased dramatically, creating a significant braking safety concern. The vehicle has been removed from normal use pending repair. I am reporting this because failure of an engine component that drives the brake vacuum pump can cause sudden loss of power brake assist.”

“Coupling on vacuum pump broke off while in motion. Pieces fell near engine. Camshaft, vacuum pump and brake booster will need to be replace. Vehicle mileage is at 65124 miles. No reason to have such a failure so early”