HomeIgnition > Ignition CoilWAI CUF303 Ignition Coil
Part #: CUF303

WAI CUF303 Ignition Coil

40 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$58.12Free Shipping
Free ShippingNo Cost to Continental U.S.
Free Returns*Wrong fit? No cost
60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Buick, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, and Saab, 9-7x, Ascender, Bravada, Canyon, Colorado, Envoy, Envoy XL, Envoy XUV, H3, i-280, i-290, i-350, i-370, Rainier, Trailblazer, and Trailblazer EXT
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Reliable Ignition Coil for Select GM and Isuzu Models

The WAI CUF303 ignition coil is designed to provide consistent ignition performance for a range of vehicles including Buick, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, and Saab models. This ignition coil ensures proper spark delivery to maintain engine efficiency and smooth operation.

  • Compatible with Buick, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, and Saab vehicles
  • Fits models such as Trailblazer, Envoy, Canyon, Colorado, H3, Ascender, Bravada, and 9-7x
  • Direct replacement ignition coil with part number CUF303
  • Engineered to meet OEM specifications for reliable ignition performance
  • Designed to support optimal combustion and reduce misfires

Product Details and Compatibility

The WAI CUF303 ignition coil is engineered to fit a variety of GM and related vehicles, including Chevrolet Trailblazer and Colorado, GMC Canyon and Envoy, Buick Rainier, Hummer H3, Isuzu i-280, i-290, i-350, and i-370, as well as Oldsmobile and Saab models like the 9-7x. This ignition coil is a direct replacement part that meets or exceeds original equipment standards, ensuring proper spark timing and engine performance. Using the correct ignition coil like the CUF303 helps maintain fuel efficiency and reduces the risk of engine misfires.

Common Applications and Problem Resolution

  • Resolves engine misfires and rough idling issues
  • Improves starting reliability in compatible Buick, Chevrolet, and GMC vehicles
  • Restores proper ignition timing for smoother acceleration
  • Addresses poor fuel economy caused by faulty ignition coils
  • Eliminates engine hesitation and stalling problems

Installation Notes and Tips

When installing the WAI CUF303 ignition coil, ensure the engine is cool and the battery is disconnected to prevent electrical shock. Verify compatibility with your specific vehicle make and model before installation. Follow manufacturer torque specifications for mounting bolts and check all electrical connections for corrosion or damage. Proper installation will help maintain ignition system integrity and vehicle performance.

Quality Assurance and Warranty

WAI ignition coils are manufactured to meet stringent quality standards and are tested for durability and performance. The CUF303 ignition coil is designed to provide reliable operation under normal driving conditions. Please refer to WAI's warranty policy for specific coverage details.

This part fits 40 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2008IsuzuAscenderN/A
2008Isuzui-370N/A
2007Isuzui-290N/A
2007Isuzui-370N/A
2006ChevroletColorado2.8LL4N/A
2006GMCCanyon2.8LL4N/A
2006HummerH3N/A
2006Isuzui-280N/A
2006Isuzui-350N/A
2005BuickRainier4.2LL6N/A
2005ChevroletColorado2.8LL4N/A
2005ChevroletTrailblazerN/A
2005ChevroletTrailblazer EXT4.2LL6N/A
2005GMCCanyon2.8LL4N/A
2005GMCEnvoy4.2LL6N/A
2005GMCEnvoy XL4.2LL6N/A
2005GMCEnvoy XUV4.2LL6N/A
2005IsuzuAscender4.2LL6N/A
2005Saab9-7x4.2LL6N/A
2004BuickRainier4.2LL6N/A
2004ChevroletColorado2.8LL4N/A
2004ChevroletTrailblazerN/A
2004ChevroletTrailblazer EXT4.2LL6N/A
2004GMCCanyon2.8LL4N/A
2004GMCEnvoyN/A
2004GMCEnvoy XL4.2LL6N/A
2004GMCEnvoy XUV4.2LL6N/A
2004IsuzuAscender4.2LL6N/A
2004OldsmobileBravadaN/A
2003ChevroletTrailblazerN/A
2003ChevroletTrailblazer EXT4.2LL6N/A
2003GMCEnvoyN/A
2003GMCEnvoy XL4.2LL6N/A
2003IsuzuAscender4.2LL6N/A
2003OldsmobileBravadaN/A
2002ChevroletTrailblazerN/A
2002ChevroletTrailblazer EXTN/A
2002GMCEnvoyN/A
2002GMCEnvoy XLN/A
2002OldsmobileBravadaN/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.