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Be careful with aftermarket MAF sensors. I put a $50 from online on my Impala with no joy. Took it to the dealer and they put on the GM sensor and it did the trick - $300 for the damn sensor. They said only a GM would work properly. If you look on the web you will find complaints from people driving GM, BMW, etc, who had the same experience. The OEMs have it locked up somehow.
If you order the right one for your car, it should be a GM part in the bag .Napa and other auto parts stores, $180.00 plus they give you a refund for the old unit Exchange mine was $75.00 core.Its a core and I would not buy any sensor on sleez bay or any other companys.
The mafs off the ls3 and ls7 are supposed to perform better, but youll need to have the car retuned. All you need is an ls7 or ls3 airbox with filter, the sensor, and an adapter harness (several vendors sell these).
If you order the right one for your car, it should be a GM part in the bag .Napa and other auto parts stores, $180.00 plus they give you a refund for the old unit Exchange mine was $75.00 core.Its a core and I would not buy any sensor on sleez bay or any other companys.
GM Parts House & Parts Taxi sell only OEM parts...........