they are just a big resistor. take it from the guy who wasted his money on one. lol, I took it apart, and it looks like a resistor. I tried plugging in one of my turn signal resistors, and what do you know? same effect. hardly anything, all it did for me was raise idle rmps and actually worsened gas mileage and acceleration. I took it out after about a week. would ya know? everything ran better!
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3rd alero- 02 GX 2.2 5sp coupe. drove for 3 years 55,000 miles. Sold for a kids first car, and missed
01 Intrigue GX
2016 Chevy SS, Jet Black
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