A blockage in the heater core is the most likely cause. This is a difficult and expensive repair.
There are a number of reasons why your cruise wont work on a 1999 Ford Pu. Your wiring could be fried.
why wont 82 Chevy van fuel guage work
Chevy did not build a Malibu in 1995.
Check the fuse
check for a blown fuse.
Check fuse. if that does not work broken wire.
Possibly broke.
Will a 1997 blazer what work on a 1999 blazer????? If your talking engine, transmission, or running gear than yes. It is all the same.
because it is heat sensitive with gloves on it wont sense your heat
From 1996 to 1999 will work.
Check your coolant. Is it thick and gunky?
check your fuses