The Lemon IndexAll cars · GMC · GMC Sierra 2500HD/3500HD
2023 GMC Sierra 2500HD/3500HD problems, engines and recalls.
Owners filed 62 complaints with the government about the 2023 GMC Sierra 2500HD/3500HD, most often about transmission & drivetrain (56%).
Which engine is in it
62 of the 62 complaints have a VIN we could decode, which tells us the engine.
| Engine | Share | Complaints | What they name most |
|---|---|---|---|
| 6.6 Duramax L5P diesel | 90% | 56 | transmission & drivetrain 61%, electrical 14%, engine 12% |
| 6.6 V8 gas (L8T) | 10% | 6 | too few to split |
Each diesel's page: Duramax L5P.
Nearby model years
What owners complain about
Share of this year's complaints that name each area.
How serious
| Crashes | Fires | Injury reports | Death reports | Towed |
|---|---|---|---|---|
| 6 | 0 | 2 | 0 | 8 |
As reported by owners to NHTSA, not verified.
In owners' words
Complete Tread/belt separation originating inside the tire. I have the complete tire and the complete tread. This happened at highway speed. I'm going to the dealer to get an inspection. The only symptom was a bad vibration before the tread separation. LT275/65R20E
2023 GMC Sierra 2500HD/3500HD owner · NHTSA complaint 11763669
I was driving in the high way and the vehicle started having issues and then it completely shut off and wouldn’t drive or anything in the middle of the highway and the dash said it was reducing power.
2023 GMC Sierra 2500HD/3500HD owner · NHTSA complaint 11714077
Driving at approximately 30-35MPH merging in traffic, the transmission shuttered and went into reduced power mode. ECM reported a 747 code and valve body failure.
2023 GMC Sierra 2500HD/3500HD owner · NHTSA complaint 11713060
Recalls 1
24V060000 Feb 2024 Latches/Locks/Linkages
General Motors, LLC (GM) is recalling certain 2020-2024 Chevrolet Silverado 2500, 3500, GMC Sierra 2500 and 3500 vehicles equipped with power-unlatching tailgates. The tailgate's electronic gate-release switch may short circuit due to water intrusion, which can result in the tailgate inadvertently unlatching while the vehicle is in park.
Fix. Owners are advised to check that the tailgate is closed and latched before driving. Dealers will replace the exterior touchpad switch assemblies, free of charge. Owner notification letters were mailed May 17, 2024. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-800-462-8782. GM's number for this recall is N232426400.
NHTSA recalls for this model year under every name these trucks are filed under. A recall that names an engine applies only to trucks with it. Free at any dealer: check the VIN.
Quick answers
Is the 2023 Sierra HD reliable?
We can't score it per truck (heavy-duty sales aren't reported apart from the half-ton). Owners filed 62 complaints about it, most often about transmission & drivetrain (56% of them). Compare the diesel generations on their engine pages.
What engine does the 2023 Sierra HD have?
By the VINs in owner complaints: 6.6 Duramax L5P diesel (90%), 6.6 V8 gas (L8T) (10%).
How many recalls does the 2023 GMC Sierra 2500HD/3500HD have?
1. Recall repairs are free at any dealer; check the truck's VIN at nhtsa.gov/recalls.
The whole-line score for 2023, mostly half-tons: 2023 GMC Sierra.
No Lemon Index score: automakers report heavy-duty pickup sales together with the half-ton (one F-Series, Ram or Silverado number), so there is no honest per-truck denominator. These are counts and shares of owner complaints, not failure rates. Complaints: NHTSA owner complaints filed under the truck's 2500/3500 (F-250/F-350) names, all years filed, one per complaint number. Engine: decoded from the complaint's VIN (position 8 is the engine code) with NHTSA's vPIC decoder. Complaints filed as just “Silverado” or “Sierra” are left out (they mix 1500s and HDs). Older trucks have had more years to collect complaints, and popular years draw more because more were sold.
Updated · Free to use with credit: Source: The Lemon Index (lemonindex.com)
. Get the data