2015 Chevrolet Tahoe Problems

What owners report

Owners of the 2015 Chevrolet Tahoe most often describe a brake pedal that becomes hard or unresponsive, usually at low speed in parking lots, drive-throughs and stop-and-go traffic, with many pointing to the vacuum assist pump and to past brake recalls. Electrical complaints follow — warning messages, random shutoffs, flickering interior lights and failing infotainment — and many vehicles also show leaking shocks, a fuel smell from the rear driver side, and hard or slipping transmission shifts. Most reports arrive between roughly 50,000 and 130,000 miles, suggesting wear-related failures that appear gradually rather than at delivery.

1. 1
   Brakes

   Hard or unresponsive brake pedal (brake assist)

   • 158 complaints (24%)
   • median 75,000 mi at 4.5 yrs old (123 state mileage)
   • 16 mention a crash, fire or injury
   • owner-quoted repair $725 (median of 10 quotes)
   • filed 2015–2026

   Owners describe the brake pedal turning stiff and needing heavy two-foot pressure, sometimes dropping toward the floor, so the vehicle does not stop within the expected distance — most often at low speed in drive-throughs, parking lots and while reversing. Some say pumping the pedal restores enough braking to limp to a shop. Complaints frequently name the vacuum assist pump or brake booster as the diagnosed cause, and several owners say the problem returned after a brake recall remedy was already applied. Mostly reported between about 50,000 and 150,000 miles, though a few vehicles show it under 10,000 miles.

   Recall 19V645000Recall 19V7610001 related service bulletin

   What to check: Ask whether the vacuum pump, brake booster and brake system recalls (including 19V645000 and 19V761000) were completed, and request receipts. On a test drive, press the pedal repeatedly at idle in a parking lot and confirm it stays firm and does not sink.

   2 excerpts from owner complaints in NHTSA records

   “I pulled into my driveway... The engine speed started increasing and simultaneously the brake pedal sunk into the floor and braking abilitywas lost. This happened about 4 feet from my garage door and this caused my truck into the garage door. I have a driveway video of me on the phone and then the car being accelerated through the garage door.”

   NHTSA complaint #11390599, filed 2021-01, 80,000 miles

   “Braking systems not working properly. The vehicle failed to stop when applying the brake pedal. All brake pads are good; brake calipers are new; brake fluid is at max. I replaced everything I found online, but the issue is there on the vehicle. Dome light issue: the interior dome lights on the vehicle flashes constantly while driving.”

   NHTSA complaint #11400141, filed 2021-03, 9,400 miles
2. 2
   Electrical system

   Electrical glitches: warning messages, shutoffs, flickering

   • 117 complaints (18%)
   • median 58,000 mi at 3.7 yrs old (72 state mileage)
   • 5 mention a crash, fire or injury
   • filed 2014–2026

   Complaints describe sudden loss of power while driving, multiple warning messages for StabiliTrak, forward collision and theft deterrent, dimming or flickering interior dome lights when the brake or turn signal is used, and doors locking or unlocking on their own. Some owners report that moving the battery cables allowed a restart, and others were told by a dealer that a module needed replacement. Infotainment screens that freeze, change settings by themselves or stop working also appear in this group. Spread broadly from under 40,000 to over 150,000 miles, with many reports between 50,000 and 130,000 miles.

   Recall 14V301000Recall 15V6400003 related service bulletins

   What to check: Check that battery cables and terminals are clean and tight, start the vehicle and watch for warning messages, and test the interior lights, door locks and touchscreen. Ask whether the radio software recall (14V301000) was performed.

   2 excerpts from owner complaints in NHTSA records

   “I own a 2015 Tahoe that I really want to like, but the problems have been one after another! I have had my window panels replaced 3 times. My dvd player stopped working. My A/C just had to be repaired for a leaking condenser, and now my back hatch won't open due to the motor going out. Oh...and I almost forgot I have been without onstar/ GPS for about a year now because that is also broken.”

   NHTSA complaint #11322002, filed 2020-04, 55,000 miles

   “When I hit a bump the steering locks up for a quick second and all the warning lights flash quickly. The doors lock as well. It is usually when I hit a bump on the passenger side area. Voltage meter flickers and headlights dim.”

   NHTSA complaint #11382967, filed 2020-12, 105,000 miles
3. 3
   Fuel system

   Fuel smell and leak near the rear driver side

   • 56 complaints (9%)
   • median 94,750 mi at 5.8 yrs old (20 state mileage)
   • filed 2015–2026

   Complaints describe a strong fuel odor inside and outside the vehicle, along with fuel dripping or pooling under the driver's side rear area, often noticed after refueling or while the engine is running. In several cases a mechanic found a small hole worn in the fuel supply line. Some owners say the leak stops when the engine is shut off. Typically reported past 80,000 miles, with several reports between 95,000 and 180,000 miles.

   What to check: Smell around the driver's side rear wheel and under the tank after a cold start, look for damp spots on the fuel lines, and ask whether the fuel supply line has been inspected or replaced.

   2 excerpts from owner complaints in NHTSA records

   “My vehicle started leaking gas while it was turned on while it was moving and stationary. A mechanic found that the fuel line developed a pin sized hole as the source of the problem. After some online research I found that this is a problem for many with my vehicle.”

   NHTSA complaint #11360825, filed 2020-09, 99,500 miles

   “Upon returning from work , my wife complained of a strong odor of fuel in and outside of the vehicle. After inspecting the engine, interior, and exterior of the vehicle a small running fuel leak was discovered beneath the vehicle on the driver side, immediately forward of the fuel tank . The leak left a small puddle of fuel under the vehicle, which continued to leak until fuel pressure dissipated 5-10 minutes later. …”

   NHTSA complaint #11364669, filed 2020-10, 111,000 miles
4. 4
   Other or unknown

   A/C blows warm, condenser leak

   • 60 complaints (9%)
   • median 51,000 mi at 2.8 yrs old (42 state mileage)
   • 4 mention a crash, fire or injury
   • owner-quoted repair $1,200 (median of 10 quotes)
   • filed 2015–2026

   Owners report the air conditioning stopping altogether or blowing hot air, with a leak traced to the condenser and, in some cases, the compressor also replaced. Some say they learned of coverage or a related program only after paying for the repair themselves. Reported from roughly 45,000 to 100,000 miles.

   1 related service bulletin

   What to check: Run the A/C on maximum for several minutes and confirm cold air from all vents, look at the condenser area for oily residue, and ask whether the condenser or compressor has been replaced.

   An excerpt from owner complaints in NHTSA records

   “The air conditioner stopped working late in 2019. It started getting cold out so we didn't need it at the time. Covid 19 hit and I didn't drive the car for weeks on end. So didn't need AC. When we did have to use it the AC was blowing hot air. There was an extended warranty for 5 years 60k miles that we did not know about. We never received information on it. We have been to the dealer many times for other service related stuff over the years and no one ever mentioned or even checked to see if the AC unit was not working. …”

   NHTSA complaint #11343165, filed 2020-08, 48,000 miles
5. 5
   Transmission and drivetrain

   Hard shifts, shuddering and slipping transmission

   • 42 complaints (6%)
   • median 42,000 mi at 3.9 yrs old (21 state mileage)
   • 4 mention a crash, fire or injury
   • filed 2014–2026

   Owners describe the transmission shuddering and slipping, shifting harshly or seeming unsure which gear to select, and in one case the vehicle moving forward while in reverse. Some say a shop found low fluid or recommended internal transmission repairs; another reported a diagnosis pointing to the transmission control module and related powertrain parts. Mostly reported between about 90,000 and 160,000 miles.

   Recall 14V1520001 related service bulletin

   What to check: Check the transmission fluid level and condition, drive at light and moderate throttle to feel for shudder or harsh shifts, and ask whether the transmission cooler line recall (14V152000) was performed.

   2 excerpts from owner complaints in NHTSA records

   “2015 Tahoe with 120000, transmission is shuttering and slipping unbelievable. Pretty much everytime it shifts it doesn't know what it wants to do. This is completely unexceptable”

   NHTSA complaint #11397645, filed 2021-02, 120,000 miles

   “The contact owns a 2015 Chevrolet Tahoe. The contact stated that on several occasions while driving at various speeds, the transmission shifted hard occasionally, and the vehicle jerked abnormally. Additionally, on one occasion, while shifted in reverse(R) the vehicle drove forward. The gear shifter was shifted to park(P) and then reverse, and the vehicle reversed as intended. The contact inspected the transmission fluid, and the transmission fluid level was low. …”

   NHTSA complaint #11681311, filed 2025-08, 157,000 miles

Buying note. A pre-purchase inspection that focuses on brake assist function, the electrical system, shocks and rear air springs, fuel lines and transmission behavior is worthwhile on this model year. Ask for recall and repair records, since several of the reported symptoms are tied to campaigns that may or may not have been completed on a given vehicle.

Summary written with AI from a sample of 60 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.