Your temperature control actuator is bad. It's a little motor that moves the temp door. They are about $70 at the dealer. To change it you need to remove the knee trim panel on the passenger side (3 screws, 7mm socket). The actuator is in the center above the transmission hump. It has one harness plugged into it and 2 screws (5.5 mm). Take the screws out and it should drop straight down. Align the actuator with the lever on the door and put the screws in. Plug the harness back in. Turn your temp control to cold and remove the HVAC 1 fuse. Should be in the fuse panel on the drivers side of the dash. Turn your key to run and leave it on for at least 1 minute. Turn your key back off and put the fuse back in.
P.S. The trim panel is a PITA to get off, so while you have it off check to see if you have the cabin air filters and change them while you are under there.
YES.
YES they are the same engines.
of'course
how do you replace the wiper motor pulse board on a 1999 Chevy Silverado 2500
Yes they interchange
No it will not. total different designed engines.
the windshield wiper motor could be getting Hot! Mine does the same thing, then when it cools off they work again.
The blower motor is located under the passenger side of the dash panel.
the blower motor relay is located next to the blower motor it is connected to the motor by a purple and black wires
Most likely a Chev 350.
Yes
292.8 cubic inches