Hi Randy, I'm pleased to assist you. Yes, these struts will fit the 18-inch wheels. Click on the link below to order while supplies last. You'll get a 30-day post-purchase price match guarantee with your order. I hope this is helpful. Enjoy shopping at Carparts.com! https://www.carparts.com/shock-absorber-and-strut-assembly/truedrive/set-rc28050005-2?can=CPGG4850_20220216

Yes

Hi Joshua, thanks for initiating contact. I can't answer your question due to the lack of information. I suggest calling our parts specialists at 1-866-529-0412 to provide the complete vehicle information so we can check fitment. Have a good one.

Hi Russel, thank you for reaching out! Yes, as long as it does not have the Police or Taxi Packages. You can click the link below to order the set while stocks last. Have a good one! https://www.carparts.com/shock-absorber-and-strut-assembly/truedrive/set-rc28050005-2?can=cpab2020_csqa_20240223

Hi Steve, Is that stock 18" wheels? Upon checking, under 2006 Chevrolet Monte Carlo SS 8 Cyl 5.3L the fit notes about the wheel size does not apply. I have also checked the interchange number SR4089 and it is a guaranteed fit for the vehicle. For your reference; https://showmetheparts.com/kyb/ To check fitment, please enter your vehicle’s year, make, model, sub-model, and engine type, and type the part's name on the search box. Once your application is selected, you’ll see a “Guaranteed to Fit” badge if the part will fit, and we recommend that you also double-check Your Vehicle Fit Details as well as the Vehicle Fitment Information table on the product page.