Fuel System Manual Control Valve (CNG): Labor Times
| Standard Hours | Manufacturer Warranty Hours | Skill Level | Notes | |
| Replace | ||||
| Control Valve | ||||
| Side Mounted Cylinder | ||||
| One | 0.9 | 0.7 | B | |
| Both | 1.1 | 0.8 | B | |
| Rear Mounted Cylinder | ||||
| One | 1.4 | 1.0 | B | |
| Both | 1.5 | 1.1 | B | |
| Shut-Off Valve | 1.1 | 0.8 | B |