I don't know without taking apart the dash, but the heater core supply lines are allows hot, which makes me assume the heater core is hot. I back flushed the heater core and got a palm full of sand and grit, but it didn't fix the problem.
Mine would stall when slowing down abruptly, or turning. I added some Marvel's Mystery Oil (8 oz./10 gal. gas) and the problem stopped. Not sure if it was because of dirty injectors or what, but the problem of stalling stopped. It's cheap and easy, and worth a try. Use 16 ounces per fill-up. You...
I have a 2003 1500 with a 4.7 that does not blow hot air. I have flushed the radiator, flushed the heater core, changed the thermostat, and still no heat. Any ideas?
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