These trucks take quite a while to warm up. I've found that just cruising around town and letting it idle in sub 30 degree temps the truck won't ever get past 140 degrees unless your driving on the highway.
Yup, I can leave mine on hi ideal in 29 degree weather for 10 mins or so, drive 15 miles to work, and it will still read cold
truck not blowing any heat , it normally had heat with no issues this problem just started.
How are you putting it in high idle??
How are you putting it in high idle??