Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Team | Truck(s) | # | Driver(s) | Primary Sponsor(s) | Listed Owner(s) | Crew Chief |
| --- | --- | --- | --- | --- | --- | --- |
| Billy Ballew Motorsports | Toyota Tundra | 15.0 | Shane Sieg | Phoenix Construction | Billy Ballew | Richie Wauters |
| Billy Ballew Motorsports | Toyota Tundra | 51.0 | Kyle Busch | Miccosukee / NOS Energy Drink | Billy Ballew | Doug George |
| Circle Bar Racing | Ford F-150 | 10.0 | James Buescher (R) | International MaxxForce Diesel | Tom Mitchell | Jamie Jones |
| Circle Bar Racing | Ford F-150 | 14.0 | Rick Crawford | Circle Bar Truck Corral | Tom Mitchell | Kevin Starland |
| Fast Track Racing Enterprises | Chevrolet Silverado | 47.0 | Brandon Knupp | FT-11 Degreaser | Dave McClure | Dave McClure |
| Fast Track Racing Enterprises | Chevrolet Silverado | 48.0 | Bryan Silas | Rockingham Speedway | Andy Hillenburg | Jonathan Mostafa |
| Germain Racing | Toyota Tundra | 30.0 | Todd Bodine | Germain.com | Stephen Germain | Mike Hillman, Jr. |
| GunBroker Racing | Dodge Ram | 21.0 | Marc Mitchell | GunBroker.com | Dwayne Gaulding | Harold Gaulding, Jr. |
| GunBroker Racing | Dodge Ram | 22.0 | Wayne Edwards | GunBroker.com | Dwayne Gaulding | Harold Gaulding, Jr. |
| GunBroker Racing | Dodge Ram | 23.0 | Jason White | GunBroker.com | Dwayne Gaulding | Doug Howe |
| HT Motorsports | Toyota Tundra | 24.0 | David Starr | Zachry Holdings | Jim Harris | Jason Miller |
| HT Motorsports | Toyota Tundra | 25.0 | Terry Cook | Harris Trucking | Sharon Harris | Danny Rollins |
| Kevin Harvick Incorporated | Chevrolet Silverado | 4.0 | Ricky Carmichael (R) | Monster Energy | DeLana Harvick | Billy Wilburn |
| Kevin Harvick Incorporated | Chevrolet Silverado | 33.0 | Ron Hornaday | Longhorn Smokeless / VFW | DeLana Harvick | Rick Ren |
| Lafferty Motorsports | Chevrolet Silverado | 89.0 | Mike Harmon | Blue Ox Automotive | Chris Lafferty | Chris Lafferty |
| MRD Motorsports | Chevrolet Silverado | 8.0 | Dennis Setzer | Malcomson Construction | Dave Malcomson | Randy Dean |
| Norm Benning Racing | Chevrolet Silverado | 57.0 | Norm Benning | D3 Outdoors | Norm Benning | Ken Causey |
| Premier Racing | Toyota Tundra | 17.0 | Timothy Peters | Hayes Iron & Metal | Steve Stallings | Chad Hendrick |
| Randy Moss Motorsports | Toyota Tundra | 5.0 | Mike Skinner | Exide Batteries / Bad Boy Mowers | David Dollar | Eric Phillips |
| Randy Moss Motorsports | Toyota Tundra | 81.0 | Tayler Malsam (R) | One Eighty | Randy Moss | Doug Wolcott |
| Red Horse Racing | Toyota Tundra | 1.0 | Johnny Benson | n/a | Tom DeLoach | Trip Bruce |
| Red Horse Racing | Toyota Tundra | 11.0 | T. J. Bell | n/a | Tom DeLoach | Rick Gay |
| Roush Fenway Racing | Ford F-150 | 6.0 | Colin Braun | Con-way | Jack Roush | Mike Beam |
| SS-Green Light Racing | Chevrolet Silverado | 7.0 | Chad McCumbee | ASI Limited | Ken White | Bobby Dotter |
| SS-Green Light Racing | Chevrolet Silverado | 8.0 | Butch Miller | ASI Limited | Bobby Dotter | Michael Davis |
| ThorSport/CAPG Racing | Chevrolet Silverado | 13.0 | Johnny Sauter (R) | Fun Sand / Rodney Atkins | Mike Curb | Jason Overstreet |
| ThorSport Racing | Chevrolet Silverado | 88.0 | Matt Crafton | Menards | Rhonda Thorson | Bud Haefele |
| Wyler Racing | Toyota Tundra | 60.0 | Stacy Compton | Safe Auto Insurance Company | Jeff Wyler | Marcus Richmond |
Question:
What is the number of the truck that has the crew chief Billy Wilburn?
Answer:
4.0