Car · GMC problems

2021 GMC Yukon problems

344 owner complaints filed with NHTSA for the 2021 GMC Yukon. The most reported area is engine and engine cooling (64% of them). NHTSA also lists 492 service bulletins and 13 recall campaigns.

Counts are what owners told NHTSA, as filed. NHTSA does not confirm each report, and a complaint is not proof of a cause. Injuries: 9. Deaths: 0.

Complaints by area

Each bar is the share of this model year's 344 complaints that name that area. A complaint can name more than one area, so the shares add up to more than 100%.

• Engine and engine cooling219 · 64%
• Fuel system56 · 16%
• Power train (transmission and drive)55 · 16%
• Electrical system31 · 9%
• Other or unknown22 · 6%
• Forward collision avoidance19 · 6%
• Air bags18 · 5%
• Service brakes12 · 3%

14 smaller areas not shown (52 complaints in total).

Do not compare models by these numbers. NHTSA has no sales count for each model, so a model with more complaints may just have sold more cars. Use them to see which areas owners write about, not to rank cars.

Service bulletins

NHTSA's database lists 492 repair bulletins from GMC for the 2021 GMC Yukon. A bulletin is a repair instruction sent to dealers. It is not a recall and does not mean your car is covered. The 8 newest:

1. PIT6477DReceived October 6, 2026

   This preliminary PI was created to advise techniians in the field that they will not be able to perform a GDS automated bleed with the scan tool dues to a issue with the software in the scan tool.

2. PIT5698FReceived September 30, 2026

   This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.

3. PIT5801FReceived September 10, 2026

   Diagnostic tips for air leveling suspension system.

4. PIT5869BReceived September 2, 2026

   This PI provides a diagnostic tip when fuse F4DR is opening and dealerships are to inspect the wiring at the center console lid.

5. PIC6551CReceived August 27, 2026

   To dealer to perform a MEC reset for wireless projection issues.

6. PIT6446AReceived July 30, 2026

   This PI Communicates information to ensure Memory Recall is enabled to ensure memory mirrors return to set position after curbview assist is used.

7. PIT5099JReceived July 29, 2026

   PI to help diagnose A/C concern.

8. PIT5509NReceived July 29, 2026

   This PI provides diagnostic tips for diagnosing electric trailer brakes issues.

Recalls

NHTSA lists 13 recall campaigns for the 2021 GMC Yukon. Recall repairs are free at a GMC dealer. The 3 to look at first:

1. 25V274000April 24, 2025

   Engine and engine cooling

   The connecting rod and/or crankshaft engine components may have manufacturing defects that can lead to engine damage and engine failure.

2. 21V739000September 23, 2021

   Fuel system, gasoline

   The fuel pump power control module may cause the fuel pump to fail or operate intermittently, which can interrupt fuel flow to the engine, and cause an unexpected engine stall.

3. 21V064000February 11, 2021

   Fuel system, gasoline

   The fuel tank assemblies may be missing adhesive between two layers of the fuel tank shell which may result in a fuel leak.

See all 13 recalls for the 2021 GMC Yukon, or check your VIN below to see which are open on your car.

Common repairs in this area (not a diagnosis)

These are repair jobs that sit in the areas owners report most. A complaint may need a diagnosis first: the same symptom can come from many causes, and a serious one such as engine failure is not fixed by a cheap part. They are not a forecast of what your Yukon will need. Ranges are US estimates for all makes.

This model year has an engine recall in NHTSA's data. Before you pay for an engine repair, check the recalls and ask the dealer about warranty extensions for your VIN. Those repairs can be free.

Start with a diagnosis

• Diagnostic scan (check engine light)$55 to $250

Engine and engine cooling 219 complaints · 64%

No repair price here: this area usually needs a diagnosis first. A diagnostic scan (check engine light) runs $55 to $250.

Fuel system 56 complaints · 16%

• Fuel pump replacement$370 to $1,075
• Fuel injector replacement (one injector)$170 to $820
• EVAP purge valve replacement$80 to $240
• Gas cap replacement$5 to $95

Power train (transmission and drive) 55 complaints · 16%

• Transmission fluid service$140 to $480
• Transmission solenoid replacement$290 to $1,200
• Torque converter replacement$880 to $2,475
• Clutch replacement (manual transmission)$1,000 to $2,050

Electrical system 31 complaints · 9%

• Battery replacement$150 to $470
• Alternator replacement$360 to $930
• Starter replacement$280 to $740
• Battery cable replacement$100 to $340

Check a quote you got

Check your VIN

Complaints and bulletins cover a whole model year. Only the VIN shows what is open on your car.

By VIN By year, make and model

VIN (17 characters, on the dashboard by the windshield or the driver door jamb)

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Look up this VIN

Recall and complaint data comes from NHTSA, the US government's vehicle safety agency, and is cached for up to a day. Recall repairs at a dealer are free. A recall that is not listed may not apply to your car or may not be filed yet. Check nhtsa.gov/recalls too.

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2021 GMC Yukon: questions

What are the most common problems on the 2021 GMC Yukon?

Of the 344 owner complaints filed with NHTSA for the 2021 GMC Yukon, 219 (64%) name engine and engine cooling, and 56 (16%) name fuel system. A complaint can list more than one area, so the shares add up to more than 100%. These are owner reports, not proven causes.

Is the 2021 GMC Yukon reliable?

These numbers cannot say. NHTSA complaints have no sales count to compare against, so a high number on one model does not mean it fails more than another. Use them to see which areas owners write about, then check your own VIN for open recalls.

Do these complaints include crashes or fires?

Owners marked 9 of the 344 complaints as involving a crash and 0 as involving a fire. They also reported 9 injuries and 0 deaths. NHTSA records these as the owner reports them and does not confirm each one.

How many recalls does the 2021 GMC Yukon have?

NHTSA lists 13 recall campaigns for the 2021 GMC Yukon. Recall repairs are free at a GMC dealer. Enter your VIN to see which ones are open on your car.

What is a service bulletin?

A service bulletin is a repair instruction a maker sends to its dealers. It is not a recall, and it does not mean your car is covered. NHTSA lists 492 repair bulletins for the 2021 GMC Yukon.

More

• 2023 Yukon problems
• 2016 Yukon problems
• 2015 Yukon problems
• 2021 recalls
• All GMC recalls
• GMC problems by model
• Check-engine codes

Sources

• NHTSA complaint and technical service bulletin files, checked October 29, 2026
• NHTSA recalls

Complaint, bulletin and recall counts come from NHTSA as filed. Repair prices are estimates from our own ranges. Not a repair shop, estimates only.