2018 Chevrolet Tahoe Problems

Half of the owners who gave a mileage had the problem by about 83,000 miles.

What to check before you buy

• Ask the seller not to warm the car up, and start it cold. Listen for ticking, knocking or a rough idle in the first minute.
• Pull the oil dipstick and the oil cap. Low oil, a gasoline smell or a milky film on the cap are reasons to walk away or get an inspection.
• Plug in an OBD2 scanner. Stored or pending codes matter, and so do readiness monitors that show "not ready", which usually means the codes were cleared right before the sale.
• Ask for oil change records. A gap in the records on a model known for engine complaints is a negotiating point at minimum.

Tools that help

What owners said

During a road trip, we came to a stop and upon stepping on gas to proceed on the road and it wouldn't go. The engine revved and "pulled" until we were able to move. We took it to a dealership as well as private mechanic and was told it is an engine problem and running $3k or more to have it fixed. We have small children and consider this…Owner complaint, filed 2026

Was driving approximately 45MPH and the truck just slowly powered down and "Engine Power Reduced" and eventually cut off and wouldn't crank back up. Got it towed to the Chevrolet dealership and was told the engine has to be replaced due to the bottom of the motor and the crankshaft in cylinder one. Was told it would be 17k to repair it.Owner complaint, filed 2026

What to check before you buy

• Drive it from cold if you can. Shifts should be smooth in every gear, including reverse.
• Feel for slipping (revs rise without the car speeding up), shudder at low speed and a delay when you put it in gear.
• Listen for whining, which is a common CVT complaint, and clunks when you go from drive to reverse.
• If it has 4WD or AWD, engage it on the test drive and ask when the transmission and differential fluids were last changed.

Tools that help

What owners said

Transmission failure at 110,000 miles. No warning lights, no codes. The transmission was slipping during acceleration, random rpm bouncing at a steady speed, acting lost in gears, slow power up hills then takes off. Currently sitting at a chevy dealership.Owner complaint, filed 2025

The contact owns a 2018 Chevrolet Tahoe. The contact stated that while driving at an undisclosed speed, the vehicle began to shake excessively, prompting the contact to discontinue driving the vehicle. The check engine warning light was illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the transmission. The…Owner complaint, filed 2025, at 80,000 miles

Half of the owners who gave a mileage had the problem by about 50,000 miles.

What to check before you buy

• The pedal should feel firm and the car should stop straight without pulling, grinding or a pulsing pedal.
• The ABS and stability control lights should go out after startup and stay out.
• Look through the wheels at the rotors. A deep lip on the edge means brakes are due soon, which is a fair thing to negotiate on.

Tools that help

What owners said

The contact owns a 2018 Chevrolet Tahoe. The contact stated that while attempting to start the vehicle, the brake pedal had to be depressed very hard to start the vehicle. The contact stated that while depressing the accelerator pedal, the vehicle failed to respond as intended. A dealer was contacted. The vehicle was taken to the dealer…Owner complaint, filed 2025, at 72,000 miles

The contact owns a 2018 Chevrolet Tahoe. The contact stated while driving at an undisclosed speed, the brake pedal was depressed with the brake warning light illuminated. The vehicle was able to restart; however, the failure recurred. The vehicle was taken to the dealer where it was diagnosed that the vacuum pump had failed and needed to…Owner complaint, filed 2024, at 92,104 miles

What to check before you buy

• Test every switch: windows, locks, mirrors, seat heaters, the screen, the backup camera, Bluetooth and every USB port.
• Watch the dash at startup. Every warning light should come on briefly and then go out.
• Have the battery and charging system tested. A weak alternator or battery drain shows up here.

Tools that help

What owners said

Purchased brand new Chevy 2018 Tahoe in April 2019. Overall good car never had any issues until 02/08/23 as I was driving a got a service alert "Trailer Brake System", It was so random since we have not hauled anything for that to even become a problem. The next day 2/09/23 the car was not drivable it wouldn't turn on it kept giving me…Owner complaint, filed 2023

Entire vehicle loses electrical power. The vehicle does not shut off, however. Lights, dash, display etc. Possibly a grounding issue. Problem has not been looked at yet, but has occurred twice in the last week. No warning lights available. Occasional park assist failure occurs, may or may not be related.Owner complaint, filed 2021

Half of the owners who gave a mileage had the problem by about 59,000 miles.

What to check before you buy

• Turn the wheel lock to lock while parked and listen for groaning, clicking or binding.
• On a straight road the car should track straight with the wheel centered and no loose feeling.
• A power steering warning on the dash, even briefly, deserves a mechanic’s look before you buy.

Tools that help

What owners said

The contact owns a 2018 Chevrolet Tahoe. The contact stated that after parking the vehicle in a parking lot and returning to start the vehicle, the “Power Steering Assist Fault” message was displayed, and the vehicle was difficult to turn to the right or the left. The contact left the vehicle in the parking lot and after returning to the…Owner complaint, filed 2025, at 84,000 miles

First occasion the car drove fine with no indication of an issue. Then once the car was turned off then on, the dash showed no lights or gauges and indicated that the steering assist is not working and the wheel was impossible to turn (almost like a limp mode but not driveable). Disconnected the battery to try and clear the issue and car…Owner complaint, filed 2024

What to check before you buy

• Smell around the engine bay and under the rear of the car for raw fuel.
• On the test drive, accelerate firmly from a stop and up a grade. Stumbling, surging or a flashing check engine light are red flags.
• Fuel pump recalls are common. Check this exact VIN for open recalls before you buy.

Tools that help

What owners said

The contact owns a 2018 Chevrolet Tahoe. The contact stated that while driving at an undisclosed speed, the vehicle experienced moderate shuddering followed by a sudden significant reduction of motive power. The vehicle was driven to a dealer, where it was diagnosed that two fuel injectors and the associated electrical wiring harness…Owner complaint, filed 2026, at 143,000 miles

I can smell gas inside my cabin and also when parked in garage. Mechanic said my fuel injector seals are leaking and this is a known issue . The safety bulletin 18-NA-137 November 2019. This is a SAFETY ISSUE and needs to be addressed for the safety of myself and others. Please issue recall immediately so I can get fixed.Owner complaint, filed 2024

What to check before you buy

• Where it is safe, try the adaptive cruise and lane keeping on the test drive and watch for sudden braking or warnings with nothing there.
• Check the windshield in front of the camera and the bumper sensors for cracks, chips or poor repairs.
• Ask whether the windshield has been replaced. The camera has to be recalibrated afterward, and many shops skip it.

Tools that help

What owners said

The contact owns a 2018 Chevrolet Tahoe. The contact stated that in 2024 the front windshield was damaged, and the windshield was replaced. The Insurance Company was notified and requested that an aftermarket windshield be placed on the vehicle. In May of 2025 the contact noticed that the Chevrolet Assist Camera behind the rearview…Owner complaint, filed 2025, at 82,000 miles

When I started car I got service messages for side detection system, tire monitor system, safety restraint system, front camera system, trailer break system and theft deterrent system. Each one gave option to dismiss. When I would dismiss the messages would come back. When I was driving, all the things on dash, mph, oil, battery etc all…Owner complaint, filed 2024

What to check before you buy

• Check every light: headlights on low and high, fog lights, brake lights, turn signals and reverse lights.
• Run the wipers on every speed with washer fluid, and run the defroster front and back.

Tools that help

What owners said

The contact owns a 2018 Chevrolet Tahoe. The contact stated that while the vehicle was stationary, there was an abnormal explosion and the rear glass exploded in the rear of the vehicle. The contact believed that the glass had exploded without impact. The contact reached out to a window company and stated that similar vehicles had the…Owner complaint, filed 2026, at 139,000 miles

I purchased this vehicle from jm chev in lufkin tx on oct 3 2019.driving it home I noticed my headlights were not working properly. After taking it back to the dealer iwas told the headlight assembly was bad. The dealer ordered a new one. It has been 2 months.I called gm parts and was told there were no headlights like this in the usa.…Owner complaint, filed 2019, at 42,500 miles

What to check before you buy

• On the test drive, press the gas gently and firmly. The response should be smooth with no lag or surge.
• Set the cruise control, then use resume and cancel to make sure each one works.

Tools that help

What owners said

The brake pedal is too close to the driver in relation to the gas pedal. The distance of each pedal cannot be adjusted independently. A driver's foot can be trapped in between the two pedals because of the gap. In a fatal situation, it takes longer for the right foot to move from the gas pedal to the brake pedal since the right foot…Owner complaint, filed 2018

Caliper became stuck which produced smoke coming from tire. Had the caliper replaced. Then months later my forward collision system activated because a car in front of me stopped abruptly. After the car automatically braked to slow my car down, the brake never released and became stuck and the ABS light came on. Replace the abs sensor…Owner complaint, filed 2023

What to check before you buy

• Look underneath with a flashlight. Utah road salt is hard on frames, brake lines and the bottoms of doors.
• Open and close every door, the hood and the liftgate, and lock and unlock each one.
• Use a paint thickness gauge and compare panels. A panel that reads very differently from the rest has likely been repaired.

Tools that help

What owners said

Everytime it rains really hard, my drivers side b pillar where the handle and seat belt is, is soak and wet from a leak. This happens all the time. I have had my sunroof checked, my windshield checked and drain tubes checked. There is never any water or wetness on the floor, its only the headliner. This has been an on-going issue. I have…Owner complaint, filed 2026

The clear coat has completely failed on mainly the hood and roof of the entire vehicle. Each of the sides have lost a good amount of shine too but there hood and roof are a compete different color compared to the rest of the Tahoe. The paint is the pewter/grey so it is extremely noticeable and very much an eyesore.Owner complaint, filed 2026

What to check before you buy

• Drive over a few bumps and potholes slowly with the radio off and listen for clunks or rattles.
• Check the tires for uneven wear on the inside or outside edges, a sign of alignment or suspension trouble.
• Look behind the wheels for oily, wet shocks or struts.

Tools that help

What owners said

4100 Miles - Asked service dept. at dealership to check for noise coming from underside of vehicle. No service was completed. 4800 Miles - Asked service dept. at dealership to check again for noise on suspension. Service indicated it was a parking brake cable that was rubbing. 9800 Miles - Asked service dept. at dealership to check…Owner complaint, filed 2025

2018 tahoe w/ 60,000 miles began riding extremely rough any speed. So much bounce and jarring that the car is unsafe to drive on any rough road.Owner complaint, filed 2020, at 59,000 miles

What to check before you buy

• The air bag (SRS) light should come on at startup and go out within a few seconds. If it stays on, the system may not work in a crash.
• Air bag recalls are some of the most serious. Check this exact VIN for open recalls and get proof any recall work was done.

Tools that help

What owners said

We were in a severe car accident and our airbags did not deploy in our vehicle. We were going about 45 miles an hour and had windshield cracking and severe, severe damage to our vehicle. This was a front side, head on impact.Owner complaint, filed 2026

I was in an accident an rear ended a pickup truck at 50 MPH causing my front end to buckle and separate the engine from the motor mount and multiple other damages. My air bags didn't deploy and this is very concerning and felt this should be reported.Owner complaint, filed 2020, at 71,000 miles

What to check before you buy

• Pull out and latch every seat belt, and let each one retract on its own.
• Try every seat adjuster, and watch for a passenger air bag "off" light when an adult is in the seat.

Tools that help

What owners said

1- the second row center Seat Belt Receptacle stopped locking so failed, this happened while using the vehicle. 2- the seatbelt receptacle stopped latching while using the car in Seattle, I had to drive with someone in that seat unbuckled because all other seats were being used. 3- the receptacle can not be repaired, needs to be…Owner complaint, filed 2022

What to check before you buy

• Read the four-digit DOT date on each tire. Tires older than about six years should be replaced, whatever the tread looks like.
• Check tread depth on all four. On AWD vehicles all four tires should match.
• The tire pressure light should go out after startup.

Tools that help

What owners said

LT275 65 R18 123/120 R DOT 1 BE BP AT 21 My daughter has pictures of the tires, all four tires (all bought at the same time) 05/6/23 from Discount Tire, are splitting along the side wall, originating at the tread line, we have talked with Discount tire, there are 40,000 miles approximately on the tires. They have been appropriately…Owner complaint, filed 2026