I'm afraid that having a Brazilian butt lift will kill me?

Any cosmetic procedure should be performed by a board certified plastic surgeon, who is experienced in the type of surgery you desire. There are always risks undergoing cosmetic surgery. However, death from a Brazilian Butt Lift is rare. Is it possible to hit an artery by liposuction? Yes, but extremely rare with an experienced plastic surgeon. Hope this helped, best of luck!Dhaval M. Patel double board certified Plastic surgeon Hoffman EstatesBarringtonOakbrookChicago

Generally speaking a Brazilian butt lift is a very safe procedure. The complications are not volume related. The most common complications are swelling and bruising which resolve over the first month. Also, you can expect to lose 30 to 50% of the fat injected. 
If the fat is not correctly injected some of it can die and you may feel lumps, this is called fatty necrosis. Fluid collections or seromas can occur if there is too much undermining. These complications depend on the surgeon's technique and can be completely avoided. 
The most dreaded complication is a fat embolism which occurs in less than .1% of the cases. This convocation can be completely avoided by your surgeon by not injecting into the muscle layer and using a large blunt cannula. #StayBeautiful @RealDrWorldWide

Thank you for your question.

There is no question that all surgical procedures carry some risk.  The job of your plastic surgeon is to minimize that risk.  All surgery must be tempered with judgment.  There is such a thing as too much surgery.

For the average buttock augmentation the risk of hitting an artery or fat embolism is extraordinarily low.  Fortunately I have not seen these complications in over 15 years in practice.

Be sure you entrust your care to a board certified plastic surgeon. Whether you choose inpatient or outpatient surgery in an accredited center.

Good luck if you choose to proceed.