it does take a while, diesel engines have more cooling fluid than gas engine does. thats why it takes a while. it also has 2 thermostats to regulate the cooling system. its normal for a diesel engine to take a while to warm up. you can use your block heater to help it warm up quicker if you have one equipped in your truck. most truckers use block heaters to keep their engine warm for quicker starts and warmups in cold mornings.
06 LLY CCSB
Just another white truck on the site
Stock engine and trans.