My brother and l just replaced the front struts on my 2002 Lexus GS 300 and when l started it up for a test drive the VCS, ABS, and VSC OFF lights stayed on. Could it just be a loose connection or do l need to take it to the dealer.

It could be a ABS sensor wire loose or cut somthing like that. At the dealership l work at they charge $90. to hook up a scan tool to the car and check for trouble codes. That also includes 1 hour of diagnostic time. It may be different where you are. You can take it to your local auto parts store and have them pull the codes but they usally cant fix it for you. l would check the wires first then take it to your Lexus dealer to check it out if you cant figure it out.

it is a loose connection or if you want take it to the dealer.