The Lemon Index
Chevrolet's 6.2 L supercharged 90° V8, pushrod in the Corvette Z06, Cadillac CTS-V, Camaro, Cadillac CT5-V Blackwing and Cadillac Escalade-V, model years 2015–2026. YouTube likes the 2016 best.
Middle of the pack: YouTube owner tone 52/100, #57 of 165 engines with a YouTube study (in the middle third); no engine-related recall on record, 3 known issues listed below.
Everyday cars with this engine Tap a year for that car's full report.
- Chevrolet Camaro ZL120172018201920202021202220232024
- Chevrolet Corvette Z0620152016201720182019
- Cadillac CTS Cadillac CTS-V2016201720182019
- Cadillac Escalade Cadillac Escalade-V202320242025
Model years from EPA version lists. Only years we have a car page for.
Reliability by year
Why the car pages show more: the Camaro ZL1 page counts 407 complaints and 7 recall campaigns for 2017–2024, everything NHTSA files as "Camaro", other engines included; the CT5-V Blackwing page counts 36 complaints and 2 recall campaigns for 2022–2025, everything NHTSA files as "Ct5", other engines included; the CTS-V page counts 76 complaints and 4 recall campaigns for 2016–2019, everything NHTSA files as "Cts", other engines included. This page counts only the 77 complaints and 0 recalls we can tie to the GM LT4 by model name or the owner's own words.
YouTube videos are most positive about the 2016 (54) and least about the 2018 (51); neighboring years share many of the same videos, so small gaps mean little.
How we count: owner complaints only where the car's name and year leave no doubt; YouTube tone from videos that name this engine or its cars. How we count
Owner complaints (NHTSA) are filed by model and year, not engine. We count one for this engine only when the model name and year had no other engine (e.g. "488 GTB", "GT-R"), or when the owner's own words name a version that had only this engine that year (Z06, ZR1, Hellcat, GT500 ...). They cover the whole car (wheels, air bags, electrics ...), not only the engine, and none of them is a failure rate. We chart them only for engines with 30 or more, over 3 or more years. YouTube tone = how positive the videos are, 0–100, from titles and transcripts (praise vs trouble words, the title counts 3 times), weighted by views; a year needs at least 3 videos' worth. A video counts for this engine when its title names the engine or a car that only had this engine in the years it names; a video whose title names no model year counts toward every year of that car, so neighboring years share most of their videos.
All the numbers, year by year
| Year | Cars | Owner complaints | YouTube says | Recalls |
|---|---|---|---|---|
| 2015 | Corvette Z06 | 6 | 52 (80 videos) | 0 |
| 2016 | Corvette Z06, Cadillac CTS-V | 13 | 54 (77 videos) | 0 |
| 2017 | Corvette Z06, Cadillac CTS-V, Camaro | 29 | 52 (73 videos) | 0 |
| 2018 | Corvette Z06, Camaro, Cadillac CTS-V | 9 | 51 (73 videos) | 0 |
| 2019 | Corvette Z06, Cadillac CTS-V, Camaro | 17 | 53 (80 videos) | 0 |
| 2020 | Camaro | 0 | not enough videos yet | 0 |
| 2021 | Camaro | 0 | not enough videos yet | 0 |
| 2022 | Cadillac CT5-V Blackwing, Camaro | 1 | not enough videos yet | 0 |
| 2023 | Camaro, Cadillac CT5-V Blackwing, Cadillac Escalade-V | 1 | not enough videos yet | 0 |
| 2024 | Cadillac CT5-V Blackwing, Camaro, Cadillac Escalade-V | 0 | not enough videos yet | 0 |
| 2025 | Cadillac CT5-V Blackwing, Cadillac Escalade-V | 0 | not enough videos yet | 0 |
| 2026 | Cadillac CT5-V Blackwing, Cadillac Escalade-V | 1 | not enough videos yet | 0 |
Recalls on cars with this engine
No NHTSA recalls we can tie to this engine's cars.
Engine problems Chevrolet told dealers about
Chevrolet sent dealers 110 repair notes about the engine on these cars, including:
- This Preliminary Information communication provides information to the technician about vehicles that have a…
- This informational bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake…
- This service bulletin provides a procedure to repair the valve lifter oil manifold and/or lifters to correct…
NHTSA manufacturer communications (technical service bulletins), matched by model name and year like the complaints, engine-related ones only. A repair note is not a recall: ask a seller whether it was done.
Known issues on record
- Track misfire after supercharger cooling service (Maker bulletin). In high heat above 100 mph on a track, the engine can misfire (code P0300) if air was left in the supercharger cooling loop after a repair. Fix: Dealer drains and vacuum-fills the loop with GM's tools (bulletin 17-NA-408). 6 owner complaints to NHTSA mention it (6th gen Camaro ZL1).
- 10-speed automatic recall (transmission) (Recall). On 2020–2022 Camaros with the 10-speed, valve body wear can cause harsh downshifts and, rarely, a brief wheel lock-up. Fix: Dealer installs software that spots the wear and holds fifth gear before a lock-up (NHTSA 25V-148). 11 owner complaints to NHTSA mention it (6th gen Camaro ZL1).
- No known engine pattern yet (Owner-reported). NHTSA lists no engine or powertrain recall for the 2022–2025 CT5. Only one owner complaint there names a Blackwing losing power (a 2023 car).
- 8-speed automatic shudder and harsh shifts (disputed) (Lawsuit). A class action says GM 8L90 and 8L45 automatics built 2015–2019 can shudder when the fluid absorbs moisture and can shift harshly. GM disputes it; in 2025 an appeals court vacated the class certification. Fix: No recall; the court record says dealer workarounds improved drive quality on some cars. 3 owner complaints to NHTSA mention it (3rd gen CTS-V).
Sources: GM bulletin 17-NA-408: Charge air cooler draining and filling, DTC P0300 (Aug 2023, NHTSA file), GM safety recall report 25V-148: 10-speed transmission valve wear (Mar 2025), NHTSA recalls for the 2022 Cadillac CT5 (curtain airbags, daytime lights; none for the engine), NHTSA owner complaints, 2023 Cadillac CT5 (complaint 11761978: Blackwing loss of propulsion), U.S. Court of Appeals, Sixth Circuit: Speerly v. General Motors, 8L45/8L90 transmission class action (2025). The same list as on the Camaro ZL1 page, the CT5-V Blackwing page, the CTS-V page.
Every US version with this engine
| Car and versions | Years |
|---|---|
| Chevrolet Corvette Z06 Corvette Z06 · Chevrolet Corvette, every year | 2015–19 |
| Cadillac CTS-V CTS-V · Cadillac CTS, every year | 2016–19 |
| Chevrolet Camaro ZL1 Camaro · Chevrolet Camaro, every year | 2017–24 |
| Cadillac CT5-V Blackwing CT5 V | 2022–26 |
| Cadillac Escalade-V Escalade V 4WD, Escalade V AWD · Cadillac Escalade, every year | 2023–26 |
Engine code: LT4. Power: 650 hp, factory figures. Versions and years: EPA (fueleconomy.gov). Sources: General Motors LS-based small-block engine.
Quick answers
What cars have the GM LT4 engine?
In the US: the Chevrolet Corvette Z06, Cadillac CTS-V, Chevrolet Camaro, Cadillac CT5-V Blackwing, Cadillac Escalade-V, model years 2015–2026. See the version table for each one.
Is the GM LT4 reliable?
Mostly, with known issues to check. YouTube owner tone 52/100, #57 of 165 engines with a YouTube study (in the middle third); no engine-related recall on record, 3 known issues listed below. Owners filed 77 complaints we can tie to it, about any part of the car. Have any used car inspected.
How much horsepower does the GM LT4 make?
650 hp in factory figures, depending on the car.