SCITOO Ignition Coil UF742 Direct-Fit Replacement for GMC/Chevy 2014-2018 Single Coil

SCITOO ignition coil UF742 is a direct-fit replacement coil that restores spark delivery for compatible 2014–2018 GMC and Chevrolet V6/V8 engines.

Designed as a one-piece ignition coil assembly, this SCITOO unit replaces worn or failed coils on select GMC Sierra 1500, Chevrolet Silverado 1500, Suburban, Camaro and Corvette models. It converts low-voltage input from the vehicle’s powertrain control module into the high-voltage pulse needed at the spark plug, using the same mounting points and electrical connectors as original equipment for a straightforward swap. The part number family includes UF742 and cross-references commonly used OE numbers for easier fit confirmation.

How do I know this coil fits my vehicle?

Confirm fit by matching the engine displacement and production years listed for the part: 4.3L, 5.3L, 6.0L, and 6.2L engines in the specified 2014–2018 model years. Check your OEM part number against UF742 and the provided cross-reference list before ordering to avoid returns.

• Compatible with GMC Sierra 1500 (4.3L/5.3L/6.2L) 2014–2018.
• Fits Chevrolet Silverado 1500 (4.3L/5.3L/6.2L) 2014–2018 and Suburban 5.3L/6.0L (2015–2018/2016–2018).
• Cross-references: UF742, UF-742, C866 and OE numbers like 12621750, 12658183, 12674754.
• Compare the shape, connector and mounting hole locations with your existing coil before installation.

What performance changes should I expect after installing this SCITOO coil?

Replacing a failing coil typically returns engine smoothness and consistent ignition timing without changing power or fuel economy beyond factory levels. You should notice fewer misfires, more stable idle and easier starts when the coil is the source of trouble.

• Reduces sputtering and rough idle caused by weak spark.
• Helps restore proper combustion when the coil had degraded output.
• Compatible ignition waveform with stock spark plug requirements for reliable operation.

How difficult is the installation and what tools do I need?

Installation is a moderate DIY task for anyone comfortable working under the hood; it usually requires basic hand tools and 30–60 minutes per coil once the engine is cool. The coil mounts directly to the valve cover or cylinder head and plugs into the factory harness with no rewiring.

• You will typically need a ratchet, socket set, and possibly a small extension.
• Disconnect the battery before replacing coils to prevent electrical shorts.
• Torque fasteners to vehicle manufacturer specifications for secure seating.

What warranty and quality notes should I be aware of?

SCITOO provides a 12-month limited warranty on this ignition coil, covering defects in materials and workmanship under normal use. Always compare the product image and connector layout with your original part before installation to ensure compatibility and avoid fitment issues.

• 12-month limited warranty included.
• Inspect connectors and seals for OEM compatibility before final installation.
• If uncertain, consult vehicle service manual or parts diagram to verify replacement part number.

Who is this for: Drivers and mechanics who own compatible 2014–2018 GMC Sierra, Chevrolet Silverado, Suburban, Camaro or Corvette models and need a cost-effective replacement for a failed ignition coil. This SCITOO UF742 coil is aimed at vehicle owners seeking an OE-style swap that restores reliable spark delivery without modifying engine management or ignition components.