This preliminary informational (PI) bulletin provides information to dealership personnel that may be helpful when addressing underbody component corrosion with customers.
full bulletin at NHTSA ↗2018 Chevrolet Tahoe powertrain problems
severe Owners of the 2018 Chevrolet Tahoe have filed 17 NHTSA complaints about the powertrain at roughly $2,500 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See powertrain across all vehicles →
Complaints
17
Recalls
0
Avg fix
$2,500
| Model year | powertrain complaints |
|---|---|
| 2014 Tahoe | 5 |
| 2015 Tahoe | 48 |
| 2016 Tahoe | 44 |
| 2017 Tahoe | 50 |
| 2018 Tahoe (this page) | 17 |
| 2019 Tahoe | 34 |
| 2020 Tahoe | 13 |
| 2021 Tahoe | 71 |
| 2022 Tahoe | 32 |
1crash
When does it fail?
Of the 17 powertrain complaints filed for the 2018 Chevrolet Tahoe, here's the actual mileage breakdown — failures cluster heaviest at 25,000-50,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
No new NHTSA powertrain complaint has been filed on this vehicle in over 5 years — the issue may be aging out of the active population.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering powertrain on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
This Preliminary Information communication provides information to the technician about vehicles that may have a delayed engagement into drive, shudder at a launch, or the transmission is slipping when shifting into 1st, 2nd, 3rd or 4th gears. This may be due to loose stator support to pump cover bolts causing a leak at the stator support to pump cover gasket. Technician will check for the bolts to be loose. If any of the bolts are loose or the gasket is misaligned or leaking, the transmission pump cover must be replaced and the 1234 clutch plates should be inspected for being distressed and repaired as needed.
full bulletin at NHTSA ↗This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
full bulletin at NHTSA ↗This service bulletin provides information on the harmful effects of ethylene glycol in transmission fluid.
full bulletin at NHTSA ↗This informational bulletin explains Unscheduled Supplemental Services and the importance of GM Simplified Maintenance Schedules.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Engine lifter failures top the complaint stack. A 69,200-mile Tahoe owner faced a $7,100 dealer bill when a collapsed lifter damaged the camshaft and pistons, causing shuddering, clanking, hesitation, and power loss at stops—a hazard on busy roads. Owners cite known AFM-system issues on 5.3L engines that GM has allegedly known about for years but never fixed, despite multiple lawsuits.
Transmission failures appear across this cluster. Owners report sudden loss of acceleration, slipping gears, wild RPM swings, and complete stalls—some with no warning lights. One vehicle lost all power at 23 mph on a police response call; another failed at 110,000 miles just 3,000 miles out of warranty. A second complaint blamed metal shavings from internal grinding contaminating the torque converter and destroying the entire transmission.
Stalling mid-drive is another common thread: vehicles stall multiple times in a single day, lose speed on highways, and sutter on restart—some with check engine lights, others without.
Brake failures, jerking during shifts and acceleration, and one bizarre case of a vehicle rolling backward in reverse despite a depressed brake pedal round out safety complaints. A radiator leak at 32,000 miles was denied warranty coverage due to timing and warranty classification disputes, despite GM's own service bulletin suggesting coverage for earlier model years.
Same Chevrolet Tahoe powertrain reports on nearby years: 2015 · 2016 · 2017 · 2019 · 2021
Failure modes owners describe
Valve Lifter Collapse & Camshaft Damage
Lifters collapse and damage camshaft lobes and pistons. AFM (Active Fuel Management) system implicated. Owners report this is a known chronic issue on 5.3L engines that GM has failed to resolve despite years of knowledge and multiple class-action lawsuits.
When: 69,200 miles
Symptoms owners cite: Shuddering at stops; Loss of power; Noticeable clanking noise; Hesitation before accelerating; Potential engine seizure at speed
Repairs/costs cited: $7,100 dealer repair bill for lifter and camshaft replacement
Recalls/TSBs owners mention: Known issue with multiple class-action lawsuits filed; no effective recall or fix applied
Engine Metal Debris & Torque Converter Contamination
Internal engine parts grind together, producing metal shavings that contaminate the torque converter and destroy the transmission. Owners report mechanics see this frequently on Tahoes but no recall has been issued.
When: Unknown mileage
Symptoms owners cite: Loss of speed while driving; Vehicle unresponsive to throttle input; Inability to brake normally; Metal shavings in torque converter
Repairs/costs cited: Transmission ruined; owner reports loss of vehicle due to repair costs
Recalls/TSBs owners mention: No recall issued despite shop techs reporting this as common on Chevy Tahoes
Radiator Leaks
Radiator leaks on 2017–2018 models. GM issued Service Bulletin PI1513F in January 2019 for 2015–2016 models stating radiator replacement should be covered under powertrain warranty. GM has not extended this coverage or issued recall for 2017–2018 model years.
When: 32,050 miles
Symptoms owners cite: Coolant leaks
Repairs/costs cited: $1,000 radiator replacement; denied warranty coverage because vehicle was 2 days past 3-year bumper-to-bumper and GM does not classify radiator as part of powertrain warranty on 2017–2018 models
Recalls/TSBs owners mention: Service Bulletin PI1513F covers 2015–2016 models only; no recall or coverage extension issued for 2017–2018 models despite known issue
Transmission Failure & Power Loss
Complete transmission failure with sudden loss of power and acceleration capability. Multiple reports of vehicles unable to accelerate, slipping gears, erratic RPM behavior, and loss of drive. Some failures occur without warning lights or diagnostic codes.
When: 80,000–110,000 miles; one case at 94,000 miles with misfire from 80,000 miles
Symptoms owners cite: Loss of acceleration; Transmission slipping during acceleration; Random RPM bouncing at steady speed; Slow power on hills then sudden acceleration; Hesitation when shifting; Violent shaking and stalling; Jerking when shifting gears; Check engine light; Transmission overheating and limp mode activation
Codes mentioned: Check engine light (no specific codes provided in narratives)
Repairs/costs cited: Some cases require complete transmission replacement; one owner 3,000 miles out of warranty at 110,000 miles; another cited $10,000 in repair bills still unresolved
Recalls/TSBs owners mention: Owners report being denied coverage due to mileage exceeding warranty limits
Misfire & AFM/DOD System Malfunction
Engine misfires related to AFM (Active Fuel Management) and DOD (Displacement on Demand) system failures. At least one case combines misfire with transmission failure.
When: 80,000 miles noted for misfire onset; transmission failure at 94,000 miles same vehicle
Symptoms owners cite: Engine misfire; Check engine light
Repairs/costs cited: $10,000 in repair bills; issue remains unresolved after repair attempts
Stalling & Sputtering
Engine stalls while driving or at stops, sometimes repeatedly in same day. Vehicle sputters when restarted. Check engine light may or may not illuminate.
When: One case documented on 7-21-23 (3 stalls in one day); another 9-19-23
Symptoms owners cite: Multiple stalls in single day; Loss of speed while driving; Unable to maintain speed above 23–36 mph then shut off; Sputtering on restart
Codes mentioned: Check engine light (in at least one case)
Brake System Failure
Brake pedal lost pressure and went to the floor. When pressure returned, brake pedal became very hard to press and vehicle pulled hard to the left. Owners report fear of driving vehicle due to safety hazard.
When: Unknown mileage
Symptoms owners cite: Brake pedal goes to the floor; Loss of brake pressure initially, then returns; Very hard brake pedal; Vehicle pulls hard to left when braking
Recalls/TSBs owners mention: Dealer has recalls for same model/VIN but details not provided
Unintended Reverse Motion
Vehicle shifted into reverse and began driving down driveway despite brake pedal being depressed. Vehicle traveled approximately 15 feet before stopping on flat surface. Message displayed 'driving assist.' Failure occurred on multiple occasions.
When: Approximately 54,000 miles
Symptoms owners cite: Vehicle moves in reverse while brake pedal depressed; 'Driving assist' message displayed; Vehicle moved 15 feet down incline before stopping
Recalls/TSBs owners mention: Dealer notified; manufacturer not contacted at time of report
Jerking & Excessive Shaking
Vehicle shakes excessively during normal operation. One case combined with transmission failure diagnosis; another with shifting/braking jerks and check engine light.
When: 80,000 miles
Symptoms owners cite: Excessive shaking; Jerking when shifting gears; Jerking when braking; Jerking during acceleration
Codes mentioned: Check engine light
Repairs/costs cited: One case: transmission failure diagnosed and repaired, but failure reoccurred
Synthesized from 17 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 2 most recent
We just had to spend $1,000 to have the radiator replaced on our 2018 Chevrolet tahoe because it was leaking which only has 32,050 miles on it. The tahoe had a 3 year 36,000 mile bumper to bumper warranty, but we were two (2) days past the 3 year mark so they would not cover it. The tahoe also has a 5 year 60,000 powertrain warranty, but the dealership said that the radiator is not considered…
A lifter collapsed, which in turn damaged the lobes of a piston, which then damaged the camshaft...generating a repair bill of $7,100 per the dealer. The vehicle only has 69,200 miles on it. When the lifter failed, the car shuddered at stops, lost some power and made a noticeable clanking noise. When pulling out from stops, or into traffic, the car hesitated somewhat before accelerating. This…
Had powertrain trouble with your 2018 Chevrolet Tahoe?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the powertrain problem on the 2018 Chevrolet Tahoe?
It's a meaningful issue. 17 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $2,500.
At what mileage does the powertrain typically fail?
Based on the 17 complaints filed, powertrain issues most often appear around 55,350 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $2,500 for powertrain repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to powertrain?
No active recalls currently cover powertrain issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2018/Chevrolet/Tahoe.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.