Well I noticed my temp gauge wasnt workin and neither was my heater, so i figured it was my thermostate. So I put a new one in and drained the radiator. The truck drives 5 times better but the gauge and heater still dosent work, it worked for about 2 miles on my way to work but then quite. Should I try a new thermostate or what. Any advice would help thanks.

 

Was that a Cummins T-statWas the truck running bad before the T-stat

 

o reilys and it runs alot better now that i drained it