Emergency services were called to the highway, 30km south of Narrabri shortly after 1.30pm following reports the two vehicles collided.

The male driver of a ute, in his 20s, was taken to Tamworth Hospital suffering lower abdominal pain.

A NSW Ambulance spokeswoman said spinal injury precautions were taken with the man but he was in a stable condition.

The truck driver, also a man, was taken to Narrabri Hospital in a stable condition for treatment to abrasions and bruising.

NSW Roads and Maritime Services said the impact of the crash resulted in a fire, reportedly in the truck.

The highway was shut for several hours in the afternoon however light vehicles were still able to  pass the scene using a side track.

Heavy vehicles were able to use the Newell Highway from Narrabri to Coonabarabran, then the Oxley Highway to Gunnedah and then back onto the Kamilaroi Highway.

For the latest traffic information, visit www.livetraffic.com or call 132 701.