Not sure which 2001 GMC Sierra Throttle Body Spacers are right for you? We have over 1058 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"I was able to install this in about an hour. I have a lot more power but no improvement in MPG. Overall, a great product." —Jeffrey W from Hixson, TN bought an Airaid PowerAid Throttle Body Spacer for a 2001 GMC Sierra.