Pickersgill explained how the fire happened on the food truck's Facebook page.
"It's with a very heavy heart I share this news," he said.
"We were just out of Bob's Cove 20 minutes South of Queenstown after having an awesome day serving BBQ to 70 beautiful people when the truck started smoking.
The food truck is well known in the Canterbury area and beyond and is touted as the first American BBQ truck in the South Island.
Pickersgill custom-built the food truck after multiple trips to America and teaching himself the art of BBQ cooking.
"First set up in Methven, then moving to Queenstown and now Christchurch, Truck Norris is an iconic name, and well respected business in the culinary-truck industry," the website says.
The remains of the famed food truck. Photo / Facebook
A Givealittle page has been set up to help Pickersgill rebuild.
"Matt has insurance for the truck, but it's capped including catering equipment contents - it's limited insurance," the page states.