2019 GMC Sierra 1500

The 2019 GMC Sierra 1500 marked the start of a new generation, offering a more refined and technologically advanced pickup truck. Available engine options included a 2.7L Turbo I4 (310 hp, 348 lb-ft torque), a 4.3L EcoTec3 V6 (285 hp, 305 lb-ft torque), a 5.3L EcoTec3 V8 (355 hp, 383 lb-ft torque), and a 6.2L EcoTec3 V8 (420 hp, 460 lb-ft torque). Transmissions varied by engine, including 6-speed, 8-speed, and 10-speed automatics. Owners often praised the Sierra’s improved interior styling, advanced technology features (like the MultiPro tailgate), and strong performance. However, some common complaints included the functionality of the transmission, excessive vibration issues, and reliability concerns with certain components.

Engine

2.7L Turbo I4

• Piston Failure
  • Description/Symptoms: Cracked or failed pistons can cause excessive oil consumption, rough running, engine knocking, and potentially catastrophic engine failure. Often happens between 30,000 - 50,000 miles.
  • Solution: Replacing the affected pistons or the entire engine.
  • Estimated Cost to Fix: $5,000 - $8,000+
  • Recalls: None Found

5.3L EcoTec3 V8

• Active Fuel Management (AFM) Lifter Failure
  • Description/Symptoms: The AFM system, which deactivates cylinders to improve fuel economy, can lead to lifter failure. Symptoms include a ticking or knocking noise from the engine, rough running, misfires, and a check engine light.
  • Solution: Replacing the failed lifters, and sometimes the camshaft. Disabling the AFM system with a tuner.
  • Estimated Cost to Fix: $3,000 - $6,000+
  • Recalls: None Found

6.2L EcoTec3 V8

• Active Fuel Management (AFM) Lifter Failure
  • Description/Symptoms: Similar to the 5.3L, the AFM system on the 6.2L can also lead to lifter failure. Symptoms include a ticking or knocking noise from the engine, rough running, misfires, and a check engine light.
  • Solution: Replacing the failed lifters, and sometimes the camshaft. Disabling the AFM system with a tuner.
  • Estimated Cost to Fix: $3,000 - $6,000+
  • Recalls: None Found

Transmission

8-Speed Automatic (8L90)

• Harsh Shifting/Shuddering
  • Description/Symptoms: Many owners reported harsh or erratic shifting, especially between lower gears, and a shuddering sensation at certain speeds.
  • Solution: Some have had success with transmission flushes or software updates. Others have required complete transmission replacements.
  • Estimated Cost to Fix: $300 (flush) - $500 (software update) - $4,000+ (replacement)
  • Recalls: None Found

10-Speed Automatic (10L80)

• Harsh Shifting/Hesitation
  • Description/Symptoms: Harsh shifts, especially under light acceleration or deceleration. Hesitation or delayed engagement when shifting into drive or reverse.
  • Solution: Software updates performed by the dealership. In some cases, valve body replacement.
  • Estimated Cost to Fix: $150 (software update) - $1,000+ (valve body replacement)
  • Recalls: None Found

Suspension

• Vibration Issues
  • Description/Symptoms: Vibration felt throughout the vehicle, especially at highway speeds. Often attributed to driveline imbalances or wheel/tire issues, but difficult to diagnose and resolve.
  • Solution: Balancing tires, checking driveline components, replacing driveshaft.
  • Estimated Cost to Fix: $100 - $1,000+ (depending on the cause)
  • Recalls: None Found

Electrical

• Infotainment System Freezing/Crashing
  • Description/Symptoms: The infotainment system can freeze, crash, or become unresponsive.
  • Solution: Software updates from the dealer, or replacing the infotainment unit.
  • Estimated Cost to Fix: $0 (if under warranty) - $100+ (software update) - $500+ (replacement)
  • Recalls: None Found
• Battery Drain Issues
  • Description/Symptoms: Battery draining overnight or after a short period of inactivity.
  • Solution: Identifying parasitic drain (e.g., faulty module, aftermarket accessory), replacing the battery.
  • Estimated Cost to Fix: $100 - $300+ (diagnosis and repair) - $200+ (battery replacement)
  • Recalls: None Found

Exterior

• MultiPro Tailgate Malfunctions
  • Description/Symptoms: The MultiPro tailgate can experience issues with its various functions, such as failing to open properly, sticking, or having latching problems.
  • Solution: Replacing the tailgate latch, the struts, or the entire tailgate assembly.
  • Estimated Cost to Fix: $100 - $1,000+
  • Recalls: None Found

Interior

• Cracked Dashboard
  • Description/Symptoms: The dashboard can crack, particularly in warmer climates.
  • Solution: Replacing the dashboard.
  • Estimated Cost to Fix: $800 - $1500+
  • Recalls: None Found

Summary

The 2019 GMC Sierra 1500, while representing a significant redesign, has several common issues. The most concerning issues involve the engine (particularly piston and lifter failures), and transmission (harsh shifting). Electrical gremlins and dashboard cracks also appeared frequently. Severity ranges from minor inconveniences like infotainment glitches to major expenses like engine replacement. Estimated repair costs can vary widely, with engine and transmission repairs potentially costing several thousand dollars. The AFM issues in the 5.3L and 6.2L V8 engines are especially prevalent, highlighting the importance of researching preventative measures like AFM disablers. While the truck offers many appealing features, potential buyers should be aware of these common problems and budget accordingly.