I have been struggling with a problem in my Jimmy that I am hoping someone can help me with. I am getting very little heat from my heater. I have checked the coolant level as well as replaced the thermostat but still no joy. The temperature gauge appears to be showing the motor is operating at the correct temperature. I have 74K miles on the truck and I had the coolant replaced at 50K miles. If anyone has any ideas as to where I should look next, I would love to hear them.
Thanks in advance,
John