On March 23, 2016, it was announced that Lee would make his NASCAR Camping World Truck Series debut for SS-Green Light Racing at Martinsville Speedway in April of that year.
He finished seventeenth in his debut and ran another race for SS-Green Light at Gateway Motorsports Park before signing with GMS Racing to drive their No.
24 truck at Texas Motor Speedway late in the season.
He finished sixteenth and on the lead lap in that race, marking his third consecutive lead-lap finish.

After focusing on the ARCA Racing Series in 2017, it was announced on January 24, 2018 that Lee would drive part-time in the NASCAR Xfinity Series for Richard Childress Racing, splitting the organization's No.
3 car with Austin and Ty Dillon, Jeb Burton, and Brendan Gaughan.
Issues plagued his early runs, with a blown tire ruining a potential Top 5 his debut at Bristol Motor Speedway and a shortage of gas hindering his effort at Talladega Superspeedway.
 At Pocono, Lee had a solid run finishing 12th, and then finishing 16th at Iowa.
 At Daytona in July, Lee had a great run.
 He was in the Top 10 for the majority of the race, finishing a career-best sixth-place finish.
 Then at the second Iowa race, he finished 13th.

In May 2019, Lee joined the newly-formed H2 Motorsports to run the remaining Xfinity schedule (with the exception of the road courses) in the No.
28 Circuit City-sponsored  Toyota starting with the CircuitCity.com 250 at Iowa in June.
Although he had signed a deal with H2 for the entirety of the 2020 NASCAR Xfinity Series season, he was released by the team for "performance-based" reasons before the Sport Clips VFW 200 at Darlington in August.
On March 23, 2016, it was announced that Lee would make his NASCAR Camping World Truck Series debut for SS-Green Light Racing at Martinsville Speedway in April of that year. He finished seventeenth in his debut and ran another race for SS-Green Light at Gateway Motorsports Park before signing with GMS Racing to drive their No. 24 truck at Texas Motor Speedway late in the season. He finished sixteenth and on the lead lap in that race, marking his third consecutive lead-lap finish.
After focusing on the ARCA Racing Series in 2017, it was announced on January 24, 2018 that Lee would drive part-time in the NASCAR Xfinity Series for Richard Childress Racing, splitting the organization's No. 3 car with Austin and Ty Dillon, Jeb Burton, and Brendan Gaughan. Issues plagued his early runs, with a blown tire ruining a potential Top 5 his debut at Bristol Motor Speedway and a shortage of gas hindering his effort at Talladega Superspeedway.  At Pocono, Lee had a solid run finishing 12th, and then finishing 16th at Iowa.  At Daytona in July, Lee had a great run.  He was in the Top 10 for the majority of the race, finishing a career-best sixth-place finish.  Then at the second Iowa race, he finished 13th.
In May 2019, Lee joined the newly-formed H2 Motorsports to run the remaining Xfinity schedule (with the exception of the road courses) in the No. 28 Circuit City-sponsored  Toyota starting with the CircuitCity.com 250 at Iowa in June. Although he had signed a deal with H2 for the entirety of the 2020 NASCAR Xfinity Series season, he was released by the team for "performance-based" reasons before the Sport Clips VFW 200 at Darlington in August.
Shane Lee (racing driver)