Question about 2000 GMC New Sierra 1500

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My 2000 gmc sierra 4X4 suddenly quit blowing cold air. The recirculating light is on, blower is fine. In the fuse box there are several small fuses that are ok. I'm hesitant to pull the larger fuse, as I don't know if I should just pull or are there "tabs" I'm supposed to depress. I hate to take the truck in for just a fuse replacemen. help, please..joe

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  • Contributor
  • 9 Answers

Check the refrigerant level the low pressure switch will shut the ac system down if pressure falls too low

Posted on Oct 05, 2017

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  • GMC Master
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Not blowing any air , hot or cold ? blower is fine ???? How do you know the blower is fine if not blowing any air ? Doesn't work any speed ? High , low , med. Blower motor , resistor or relay . Watch this video ! Do you have a volt meter , know how to test automotive electrical circuit's ?
Blower Motor Problems Auto Repair Help
Free wiring diagram here http://www.bbbind.com/free_tsb.html Look for the correct fuse's for the blower motor .
Enter vehicle info. year , make , model and engine size. Under system click on HVAC ,under subsystem HVAC controls will pop up automatic. Click search button then first blue link . Look at diagram to see which fuse is for the blower . Test voltage with volt meter

Posted on Oct 05, 2017

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Posted on Jan 02, 2017

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SOURCE: 2000 GMC Sierra 5.3 Litre, won't blow hot air

I experienced the same head ache. First attempt was to replace the thrmostat and after taking it apart I realized that there was nothing wrong with it. I then removed the plastic cover/panel located under the dash board on the passenger's side. (only a few 4-5 smalls screws) Removal will enable you to see the on/off switch/gate moving/rotating as you turn the knob to hot or cold positions, on the control panel. If that switch/gate seems to work ok, then the trouble is within the heater core. Many mechanincs suggested that I replace the heater core. A very expensive proposition.
I checked the heater core supply/intake hose and found it hot to the touch, while the return hose was nearly cold. It was definitely a heater core blockage. I removed both ends (supply and return) hose connections/clamps. They are located near the fire wall in the engine compartment. A special tool is very helpful to remove those clamps easily and to replace them as well. It can be done the old fashion way but this tool was a life saver and reduced work time to just minutes. (Tool is $70.00 bucks at auto parts store,so I borrowed mine from a mechanic/friend)
I then hooked up a garden hose to the return end of the heater core and reversed the flow of coolant/water through the heater core. My truck is a Sierra 2000 and I refuse to see how a heater core could get clogged up with clear coolant alone. To my surprise a flat piece of rubber about the size of a quarter blew out of it and the flow of water became unobstructed. I reconected the ends of the hoses to the heater core, replaced the lost antifreeze & everything returned back to normal. No money spent for something most mechanics suggested I replace control valves/switches ($280.00) replace heater core ($500.00) etc etc. I am glad I was curageous enough to tackle this myself and save a few pennies. Good luck, and I hope this will work for you.

Posted on Dec 02, 2008

  • 1 Answer

SOURCE: 2003 GMC Sierra heater Blower wont shut off

My 2003 Sierra's blower came on by itself in the garage while I was sleeping and ran the battery completely down. I had to replace the blower switch located under the glove box next to the blower at the bottom of the right corner of the dash. The switch is in front of the blower and held in by two screws. Disconnect the two wire connections. This is a "dealer only" part and cost me 65.00. Also check the wire harness with seven wires connected to it for melted plastic. It will be marked "ABCDEFG". If it has melted, you'll need to replace it. Pay attention when reinstalling either part, that the wires "ABCDEFG" match the switch in that order.

Posted on Jan 17, 2009

  • 65 Answers

SOURCE: Brake lights quit working.

if all fuses and bulbs are ok get to the brake switch and see ifits stiff or stuck, if it just has two wires on it you could join themtogether to see if the brake lights come on though obviuosly dont leave them joined.Good luck davelee

Posted on Mar 23, 2009

  • 67 Answers

SOURCE: 2004 gmc sierra 5.3. AC not working AC Compressor fuse blowing

UNPLUG THE A/C CONNETOR ON THE A/C COMMPRESOR. REPLACE THE FUSE AND TURN ON THE SWITCH. FUSE OK . REPLACE THE COMMPRESSOR AND THE RECIVER DRIER.

Posted on Apr 17, 2009

  • 5 Answers

SOURCE: o6 GMC SIERRA FUSE BOX

Check trailer wiring, That's a good place to start.

Posted on Jul 27, 2009

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1 Answer

I have a 2003 Saturn L200 2.2L Manual Drive and the heater or AC will not work no air blowing.


There is a relay that powers the blower motor circuit . Left I/P fuse box , do you know where that is ? The relay is IGN 3 relay .
Fuse Block- I/P - Left
LF of the passenger compartment, behind the kick panel
IGN 3 RELAY
--
IGN3, HVAC CNTRL MODULE
IGN 3
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Does your car have Manual or automatic climate control ?

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I have a 93 gmc sierra 1500 4x4 every time i engage it into 4x4 it blows the 4x4 fuse


Try unplugging the front axle actuator (at the front differential). If the fuse stops blowing, you have a short inside the actuator.

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My son has a 2000 gmc sierra.. the truck was running often low on gas and when he recently turned the truck off whenever you attempt to start the truck when u turn the key over it blows the ecm-b fuse. ...


That fuse powers several things, including the fuel pump relay.
You would need to disconnect the harness at the pump and see if the fuse still blows.

Sep 25, 2012 | 2000 GMC Sierra

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Air condition is cold but the fan is not blowing air on a 1997 gmc 1500 truck checked the fuses in truck..


the first thing i would check is the relay for the blower motor. if the relay is operating properly the blower motor or the resister may have failed. on your vehicle the blower motor and the resister are a single assembly. its behind the glove box, fairly easy to replace.

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1997 chevy silverado pu 4x4 keeps blowing eng 1 fuse runs for about 15 seconds when fuse blows engine almost quits but keeps running and runs fine. The transmission jerks in overdrive going down the road...


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2 Answers

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it seems you have a short in either one of the lights or interlock. all are connected to the same fuse. trace the wiring from the fuse box back to the component. Using a test light test in between the wires. check for any obvious breaks in the wiring.

Dec 06, 2008 | 1991 GMC Sierra

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