Yes, you can include sales tax paid on a vehicle in 2018 for a Schedule A sales tax deduction. But, keep in mind that you can only claim one or the other - state and local income taxes paid or state and local sales taxes paid.
There are also two ways to deduct your sales taxes - a general predetermined amount (plus major purchases such as a vehicle) or an actual sales tax amounts (itemized list). You will need to keep receipts to back up any deduction amounts claimed using an itemized list.
Also, sales tax is still an itemized deduction. So, you would need to have more total itemized deductions than the standard deduction, which was doubled this year making it much harder for people to itemize ($12,000 single, $24,000 married filing joint).