- Jun 21, 2014
- 43
I've got an 04 TB EXT. I'm having issues with the rear heat (or lack thereof...). It's only blowing cold air. From my research on here and that "other" forum, it's either the rear heater core or I need to install the auxiliary heater pump that they suggest in the TSB. Before I go ahead and replace the heater core and/or install the heater pump, the dealer suggested I do a REVERSE coolant flush to clear out any blockage. Fine by me! Only one problem, I have no idea how to go about doing that. Haven't found any vids on youtube or anything else that would help me with this. Anyone got any pro-tips on this? Thanks in advance!