Cabin Heat slow to warm up
Just curious if I've got a problem, or if everything seems normal. It seems like the cabin heat is taking longer to heat up as of recently, but I've really just started to pay attention to it as it hasn't been too cold until lately.
The water temp gauge seems to climb at the normal rate, eventually reaching between 180 and 195, depending on if I'm sitting still, going slow or at higher speeds (and higher RPM's). Although, maybe it's climbing a little slower than normal, not positive.
Other than a blockage in the cabin's heat exchanger, any ideas? It does eventually blow nice and warm, but will cool if the RPM's slow down.
I flushed the cooling system twice over the summer, which is why I'm wondering about other possibilities. I realize a blockage could still be the problem, but am curious about other things.
1998 K2500 Suburban 6.5L TD 3.73 rear, Ron Schoolcraft 18:1, Kennedy ECM & IC, Timing gears, Splayed main caps, 3.5" Kennedy Exhuast/No Cat, K&N Filter, Boost/Tranny Temp/EGT(Pre Turbo), Ceramic-coated Manifolds, 195 Stat's, 265/75's (VSSB Adjusted) 7,000lbs (on a scale) Remote Mount Oil Filter, Remote Oil Pressure Sensor