1991 GMC Suburban 1500 v8 - 350 ac Question: I need to change my heater corein truck and put a new one in. Can I get to it bu pulling the glove box door off and going in right from there Without taking dash off Pleae send me picture details of how you get at it and put new care in Thankyou Tommy

Remove the glove box, you will see two connectors held in with screws with wires going to them. The lower connector is the resistor pack. Disconnect the connector, remove the screws and the resistor pack will slide out when pulled on. Then put the new resistor pack in making sure the orientation is correct, install the screws, reconnect the connector and install the glove box. Then you should be all set to go. I hope this info helps!

If its not near the blower motor, it may be on the hvac box on the firewall in the engine compartment. It depends on if it has ac or not.
They are usually behind the glove box mounted in the side of the heater box.

Sounds like your controller is bad. http://www.resistorguide.com/applications/blower-resistor/ <Read this info.
http://www.ebay.com/itm/88-94-GMC-CHEVY-TRUCK-CLIMATE-HEATER-CONTROL-93-92-max-SILVERADO-SUBURBAN-SIERRA-/381127684906

if the motor hasnt been running for a long time it will squeel. my father has a k1500 truck the same year and to change the motor you need to remove the glove box

The heater motor is inside under the glove box.If it stops working sometimes you can kick it with your foot and it will work untill you shut it off. Hope this helps ya.

First disconnect the heater hoses. Have a pan to catch the coolant when you do.The fasteners for the heater box are in the engine compartment on the fire wall. Undo the nuts there, according to my picture there should be at least 3 or maybe 4. Then remove the glove box and door and disconnect the door cables on the box. Take the floor outlet and the defrost outlet off, they each have screws holdong them on. There will be 3 or 4 more screws holding the box on the inside of the cab, these come off now. Pull the heater box back easily until you can unplug the wire harness and then remove the box. then you can replace the core and put it back in the reverse order. Hope this helps.

This was the procces on an 86 chev 1/2 ton. Should be the same. Remove glove box. Undo manual controls for duct work. you'll see them there behind where the glove box was on top of the heater core housing. Bemove screws/bolts. Don't remember how many there are. Undo hose clamps in the engine compartment. Remove heater core.

need to replace blower motor

your problem is your blower motor resistor.

you need to remove the glove box disconect the heater hoses look behind the glove box some heater boxes are two pieces and you can remove the heater half some you need to remove the whole piece if that is the case let a garage do it because they need to disconect the a/c so it needs to be evacuated and recharged if it is a two piece box just remove the bolts that hold the heater core under the dash and pull the box strait back good luck