AISHAN Fuel Injectors Set of 4 for GMC Terrain 1.5L (2018–2019) — OE Fit, Improved Atomization

AISHAN's Set of 4 Fuel Injectors 55577403 is a factory-fit replacement that restores precise fuel delivery for 1.5L turbocharged engines in GMC Terrain 2018–2019 models.

These injectors are engineered to match OE dimensions and electrical connectors so they slide into the fuel rail and intake assembly without modification. Designed to improve atomization and consistent spray patterns, the AISHAN injectors help address rough idle, hesitation and poor throttle response caused by worn or clogged units. Each kit contains four injectors supplied to replace a full bank on inline four-cylinder engines, and the parts correspond to OE numbers including 55577403 and 12644767.

How will these injectors affect everyday driving?

Replacing degraded injectors with the AISHAN set can return smoother idling and steadier acceleration by restoring even fuel distribution to each cylinder. Better atomization supports more complete combustion, which often improves responsiveness during city driving and highway merging.

• Reduces engine stumble and hesitation under throttle.
• Helps stabilize idle RPM and reduces vibration.
• Ensures consistent spray angles for uniform cylinder performance.

Are these injectors compatible with my vehicle?

The AISHAN 55577403 set fits specific GM four-cylinder turbo and naturally aspirated engines from model years listed; confirm fitment against your VIN or existing OE part numbers. Common compatible models include GMC Terrain 1.5L (2018–2019), Chevy Equinox 1.5L (2018–2019), Chevy Malibu 1.5L (2016–2019), Chevy Cruze 1.4L (2016–2019), and Buick Encore 1.4L (2016–2019).

• Matches OE fit and electrical connector layout for direct swap.
• Cross-references: 55577403, 12644767, FJ1293, 67901.
• Verify fitment with your VIN or service manual before purchase.

How difficult is installation and what tools are needed?

Installation is straightforward for anyone familiar with fuel-rail service: remove the rail, swap injectors, replace seals, and reassemble. The injectors are manufactured to factory dimensions so no aftermarket adapters are required; standard hand tools and basic fuel-system safety procedures are recommended.

• Requires basic hand tools and fuel-line safety precautions.
• Includes factory-compatible connectors—no splicing needed.
• Replace O-rings and support clips during installation for a reliable seal.

What maintenance or replacement interval should I expect?

Fuel injectors can accumulate deposits over time; AISHAN recommends considering replacement between 20,000 and 40,000 miles if you experience poor spray, misfires, or reduced performance. Regular fuel-system cleaning and proper fuel quality will lengthen service life but replace injectors when symptoms persist.

• Suggested inspection or replacement at 20k–40k miles depending on driving and fuel quality.
• Use recommended fuel additives and maintain the fuel filter to limit buildup.
• Replace all four injectors on the bank for consistent performance.

Who is this for: The AISHAN Set of 4 Fuel Injectors 55577403 is aimed at owners and mechanics of GM compact SUVs and sedans who need a reliable, direct-fit replacement for a failing injector bank. If your GMC Terrain (1.5L, 2018–2019) or a compatible Cruze, Malibu, Equinox or Buick Encore is showing uneven idling, hesitation, or lower engine smoothness, this kit supplies four matched injectors that meet OE form and connector standards. Ideal for DIY installers and professional shops seeking a cost-effective alternative to dealer parts while retaining correct fit and function.