GN10114 Ignition Coil

This is for the 4.2L LS "Vortec" inline 6 motor, which comes in several different vehicles; buick rainier, chevy trailblazer, gm envoy, some others. This is the coil pack you want to go with. The OEM ones are Delphi, and Delphi has made electronics for Chevy for quite some time, just like AC Delco. You can also opt for AC Delco coils, but they're a bit more expensive. Good option Edit-- This is the one. I've tried several other brands and they all are crap except for AC Delco, Delphi, and NGK. Do not use the cheap-o coils. They simply do not last. I had a situation where I replaced one coil with a cheapo coil, and I thought my motor was knocking. Turns out, it was the coil arcing through the low-quality rubber boot. I wasted a lot of time trying to diagnose this, only to find out it was the cheap coil. So in short, save yourself some time, money and headache by paying the extra for this OEM option.

I highly recommend these so far -1 month and working great. They are a moderate price, workmanship is twice as good as the cheap ones.. 2 years ago I replaced the coils with a cheap Chinese version. 2 years and 2 months later I had 3 fail. I had to pay for a computer diagnosis, because I thought it was something else. I replaced all of them along with the spark plugs (should be mandatory). The coils are easy to replace, but the spark plugs on number 1 and 2 cylinders are tough without a swiveling, thin walled 6"magnetic spark plug wrench. If you are going to change the plugs just buy the wrench, don't start he project without one. The first time I changed the coils and plugs without the proper tool I regretted it. Make sure you put anti-seize grease on the spark plug threads or you may never get them out again

Work fine in my 2005 Trailblazer. I recommend this item.

Great buy for a factory grade part

Producto de muy buena calidad y rendimiento confiable. Funciona perfectamente y ayuda a mejorar el desempeño del vehículo. La instalación es sencilla y se nota la diferencia en el encendido del motor. Marca reconocida y recomendable para reemplazo.

Checked at our local parts chain store and the only replacement they had was an aftermarket coil pack for over twice the price. I was skeptical but very happy to get the authentic GM Delphi unit as I like to replace items like this with originals if at all possible. Unit fit and functioned perfectly as expected.

Can’t go wrong with OEM

Exact OEM replacement part for 2004 Trailblazer with the 4.2L i-6 engine. High quality part that is performing flawlessly. Had a misfire on #4 cylinder according to OBD2 code reader. Replaced both the spark plugs and the ignition coil. Cleared the code and runs like new with 10k miles on the replacement parts...no more check engine light.

No es exactamente como las originales que trae la camioneta, pero si se borro el código y corrigió la falla en el motor.

Works great

Perfect fit and perfect performance.

a falu que je redresse les pin du connecteur mais fonctionne tres bien

Good price good deal,fast shipping