2021 CHEVROLET TAHOE Complaints

2021 Tahoe Z71 with 70000 miles making a roaring and whining noise on reverse and turning, especially when cold. Took to shop and they changed the rear differential fluid. Now its worse. Needs a whole new rear end. This veicle is 4 years old and does not tow or use four wheel drive. The shop said there has been so many complaints and services on the same issue. Why is there not a recall on this yet? We spend $70,000 and up and expect a more quality vehicle without having to spend $4000 dollars on repairs.

I was driving on the highway at approximately 35mph when I noticed there was no response from the accelerator. I shifted the vehicle into neutral and coasted onto a side road and call OnStar for assistance. The dashboard indicator said to restart engine. I attempted to restart, but the engine would crank but not turn over (start). The vehicle was towed to the dealership where the fuel pump assembly was found to have failed and need replacement.

Issue related to the rear-differential fluid, TSB 21-NA-028. Its a known issue where the rear differential make moan/chatter noises on turning (including at low speeds). Dealers are instructed to service/replace the rear differential fluid and perform procedures to address clutch pack chatter. It is such an issue, the fluid to remedy this is on back order!

Having to replace the radiator due to it leaking around a plastic connection to metal. Was told by the dealership this has an updated part from GM due to it being a known issue.

Based on dealer inspection, oil was found sitting on top of the #2 piston, and you’ve indicated the failure is originating from the bottom end of the engine—likely involving piston, ring, or cylinder wall damage. Combined with the stored P050D, P0300, and P0302 codes, this represents a clear internal mechanical failure. Vehicle is currently at the dealership. Mechanical failure while driving the vehicle. Sensor light for service ESC and service traction control both showed as the failure was occurring.

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while turning left with a foot on the accelerator pedal, the vehicle lost motive power and started shaking. The contact pulled over to the side of the road and attempted to restart the vehicle, but the vehicle failed to restart. The vehicle was towed to a dealer, where it was diagnosed that the intake fuel pump needed to be replaced. The vehicle was repaired, but the failure reoccurred approximately five months later. The vehicle was taken to another dealer, where the fuel pump power control module needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure. The failure mileage was 35,000.

While driving and turning left and right, and while cold and turning It does a grinding/groan noice, and recently while driving it did that, and It started losing speed and the grinding worsening and I was losing control of the vehicle. Putting the vehicle in Auto makes the groan/grind worse.

PER HENDRICKS CHEVROLET IN HOOVER, AL "INSPECTED REAR DIFF FOR METAL & FOUND LAARGE AMOUNTS OF METAL ON DRAIN PLUG MAGNET. RECOMMEND REPLACING REAR DIFF DUE TO LARGE AMOUNT OF METAL FOUND IN OIL." There was no warning on the vehicle; however, you can hear it loudly when a left or right turn is made.

Driver's side headlight adjuster screw breaks very easily, and makes the headlight beam be too low with inability to adjust it. There is no way to replace it... it requires a change of the entire headlight, which requires removing the entire grill. A cheap piece that makes customers pay thousands of dollars in repairs. There are a myriad of reports of this issue online, for example here: https://www.tahoeyukonforum.com/threads/headlight-adjuster-broken-again.144355/

I am writing to formally document serious engine defects I have experienced with my 2021 Chevrolet Tahoe equipped with the 5.3L L84 V8 engine. 1.Crankshaft Failure: My Tahoe suffered a catastrophic crankshaft failure that required major repair/replacement. I am aware that GM has recalled certain vehicles equipped with the 6.2L L87 engine for crankshaft and rod-bearing defects. Based on my experience, the same or a very similar defect has also occurred in my 5.3L engine, which is currently not included in that recall. 2.Valve Lifter Failure: In addition, my vehicle has suffered from valve lifter collapse—a well-documented problem in 2021–2022 GM trucks and SUVs with both the 5.3L and 6.2L engines. This caused severe misfiring, drivability issues, and expensive repair needs. Why this is a concern: •Both failures occurred well before what would be expected of a modern engine. •The crankshaft failure raises a safety risk: sudden loss of propulsion while driving could lead to accidents. •The lifter issue is widely reported by other owners and has been the subject of GM service bulletins. •Taken together, these problems suggest systemic defects in the 2021 Tahoe’s 5.3L engine that have not been adequately addressed by GM. Requested Action: •I ask GM to extend recall and warranty coverage to include the 5.3L L84 engine in addition to the 6.2L L87. •I ask NHTSA to consider investigating whether the scope of the current 6.2L recall should be broadened to include 5.3L engines, given failures like mine. •At minimum, I request assistance in covering repair/replacement costs for both the crankshaft and lifter defects, which are clearly not due to normal wear and tear. Vehicle details: •Year/Make/Model: 2021 Chevrolet Tahoe •Engine: 5.3L V8 L84