What weaknesses does the GMC Sierra 1500 K2XX have?

The GMC Sierra 1500 (Petrol, 285–420 PS) comes with 3 different engines: LV3 (2014–2018, Good Choice) und L84 (2014–2018, Stay Away!) und L87 (2014–2018, Be Careful). Pay attention to the model year for the Sierra 1500!

Vehicle Weaknesses

	Weakness	Cost
!	AC Condenser Leak — GM Special Coverage 17336 Factory AC condenser cracks at weld points, refrigerant leaks out gradually. GM acknowledged with Special Coverage 17336 (5 years / 60,000 miles). Same issue as Silverado K2XX. Revised condenser (84211191) fixes the flaw. Symptoms: AC blows warm intermittently then permanently, visible refrigerant stains on condenser, compressor cycles rapidly from 70,000 km Ad 84211191 AC condenser revised K2XX 23141861 condenser Sierra original 84243590 revised condenser GM	Medium

NHTSA Owner Complaints

Below average

3,200 complaints · 2014–2018

Brakes

580 ⚠ 25

Steering

450 ⚠ 12

Lights

400 ⚠ 5

AC/Heater

350

Powertrain

320 ⚠ 8

Top Reported Issues

⚠ Brakes (580 complaints)

⚠ Steering (450 complaints)

⚠ Lights (400 complaints)

Source: NHTSA (nhtsa.gov) · 2026-04

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Known Problems and Issues

A total of 16 weaknesses have been documented for the GMC Sierra 1500 K2XX (2014–2018) — 11 engine-related and 5 vehicle-related. One problem engine: L84 (5.3L V8 EcoTec3). Typical issues affect HVAC, Suspension, Gearbox, Steering. Considered reliable: LV3 (4.3L V6 EcoTec3).

Sierra 1500 (L84, 2014–2018) — Stay Away!: AFM/DFM Lifter Failure — Class Action, Oil Consumption — Piston Rings (Class Action), Timing Chain Wear. Power: 355 PS.

Sierra 1500 (L87, 2014–2018) — Be Careful: Recall: Metal Shavings in Engine — 597,000 Vehicles, AFM/DFM Lifter Failure, Oil Consumption — Piston Rings (2019-2020 and older L87). Power: 420 PS.

What to watch out for with the GMC Sierra 1500? See the detailed listing of all engine and vehicle weaknesses in the sections above.

Frequently Asked Questions

What problems and weaknesses does the GMC Sierra 1500 K2XX have? +

The GMC Sierra 1500 K2XX has 11 known engine weaknesses and 5 vehicle weaknesses.

What should I look for when buying a used GMC Sierra 1500 K2XX? +

faq.watch_a_avoid faq.watch_a_rec

Which engine is recommended? +

Good choice: LV3 (4.3L V6 EcoTec3). The most reliable engine is the LV3 (4.3L V6 EcoTec3) with the lowest risk score. The most fun to drive is the L87 (6.2L V8 EcoTec3). Problem engine: L84 (5.3L V8 EcoTec3) — stay away!

Which GMC Sierra 1500 K2XX engine is the most reliable? +

The {code} ({displacement}) is the most reliable engine in the GMC Sierra 1500 K2XX. It has the lowest risk score of all available engines and is rated "Good Choice". However, there are 4 known weaknesses to be aware of.

Which GMC Sierra 1500 K2XX engine is the most fun? +

The {code} ({displacement}) offers the most driving fun in the GMC Sierra 1500 K2XX — rated: "Fun to Drive!". {description} 420 hp in a Denali K2XX is the sweet spot: maximum power without the T1XX recall. Deep V8 exhaust note, effortless towing, an interior that justifies the GMC badge. AFM lifter risk remains. Resale holds strong because Denali buyers maintain their trucks.

Is the GMC Sierra 1500 K2XX worth buying used? +

The GMC Sierra 1500 K2XX requires careful consideration — choosing the right engine variant is crucial.

What horsepower variants are available for the GMC Sierra 1500 K2XX? +

The GMC Sierra 1500 K2XX is available with engine variants from 290 to 426 hp. Petrol: LV3 (4.3L V6 EcoTec3), L84 (5.3L V8 EcoTec3), L87 (6.2L V8 EcoTec3).

Last updated: February 2026 · All information without guarantee