Christian Eckes was fastest in the second of two Gander Outdoors Truck Series practice sessions Friday at Michigan International Speedway.
Eckes claimed the top spot with a speed of 184.233 mph.
Burton recorded the most laps in the session with 39.
Eckes had the best 10-lap average at 180.980 mph.
Chastain was fastest, posting a top speed of 185.931 mph in the session and was the only driver to surpass 185 mph.
Gilliland was 10th on the speed chart and Burton was 12th. Both Kyle Bush Motorsports drivers will likely need to win this weekend to make the playoffs.
Rhodes, Eckes and Matt Crafton recorded the most laps in the session with 32.
Dippel had the best 10-lap average at 180.876 mph.