Question about 2003 GMC Sierra

2 Answers

Need wiring diagram for fan speed switch on 2003 gmc sierra

Fan speed switch only works on 4&5 speed,not 1,2,or 3.

Posted by on

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Master
  • 3,489 Answers

The fan control balast (or speed controler) is burned out. by design if it only goes high, its junk. replace it and youll have it fixed. should be by the fan under the dash on the passenger side.

Posted on Nov 15, 2009

  • cindolla Nov 24, 2010

    no heat in my truck,sucks hey -26 anyway i checked fuzes and thats not the prob .so either switch or blower,so how do i fix the switch and the blower....thank you..

×

  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 22 Answers

Well that is true......the resistor is junk and prob burnt....but check the connector to the resistor for a burnt terminal....if there is one, replace the connector also.

Posted on Jan 24, 2010

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I installed new resistor and connector and speed 5 won't work on blower on 2005 gmc sierra


High speed on the blower fan does not work thru the resistor.
There is a seperate circuit that sould feed 12 volts directly to the motor. If you have access to a schematic it would help.
The connectors for the high speed, burn out a lot. If you cant find I could look it up.

Oct 22, 2013 | 2003 GMC Sierra 1500

1 Answer

On my 1991 gmc my my heater switch does not come on check fuses still nothing


either main power to switch or ground wire from switch loose, bad connection , etc., I believe the main power source is through ignition switch ! I'll look @ my wire diagram & get back to ya, its EASTER, AFTER 1:00AM , see ya later !

Mar 31, 2013 | 1991 GMC Sierra

1 Answer

2005 gmc sierra heater fan quit working. I lost the fifth speed months ago and a couple of days ago lost the other four, the first day the fan would come on sometimes while driving then quit after a while...


1-4 speed are the blower motor resister . It controls all 1-4 speeds, also it's under the passanger side dash around fan, the 5th speed runs off a fuse the is located in the fuse box. It's one of those square fuses , not the relays but fuses. The resister will run $15 and fuse $5 . Good luck. I have replace these before

Jan 03, 2011 | 2003 GMC Sierra 1500

1 Answer

Wiring diagram for my 2003 GMC Sierra 1500 HD it has 5 wires at the IAT MAF .


black wire is the 5 volt reference from PCM to IAT. Tan is IAT data signal to PCM. See diagram below.

c0f7422.gif

Oct 31, 2010 | GMC Sierra 1500HD Cars & Trucks

1 Answer

2003 gmc sierra 1500 4 wheel drive truck kicks in to 4 wheel drive on its own while driving down the road


look out the code.. and check the speed sensors and the harness......check also the switch maybe you use the auto 4 wheel...thars why it engage its self automatically depending on the road,

Jun 27, 2010 | 2003 GMC Sierra 2500HD

1 Answer

2004 GMC Sierra 4dr truck. the fan does not work


The switch or the wire harness at the blower motor has gone bad. The highest setting 5 has no resistor, so the blower runs on high but the high current flow ends up burning up the switch's contact on that setting or the resistor wire harness at the blower motor has gone bad. Common would be the switch it self, if the switch is good. Then it's going to be the wire leads at the speed resistor by the blower motor under the glove box by the passenger leg compartment. Keep me posted, be glad to help you get your Sierra running 100% again soon.

Jan 06, 2010 | 2005 GMC Sierra

1 Answer

2003 GMC SIERRA K2500 HD


buy a clintons repair manual at a auto store they will have a complet break down on wiring, plus so much more its worth the $20

May 13, 2009 | 2003 GMC Sierra

2 Answers

Wiring diagram 2003 GmC Sierra


I need wiring digram for GMC 2003 SIERRA . I have the left head light working fine but the right I have no power to it. I have checked the fuses and relaysand so far have not found and broken or frayed wires.

May 12, 2009 | 2003 GMC Sierra

2 Answers

Fan speed switch only works on #5


Call your local GMC Dealer and see if they have the climate control panel in stock. What happens is the circuit board on the back of the panel shorts out. The panel comes as an assembly and is very easy to replace. Don't go with a wrecking yard piece. I made that mistake once and it didn't work either. I got one from the Chevy dealer and it worked perfectly.

Aug 21, 2008 | 2002 GMC Sierra

Not finding what you are looking for?
2003 GMC Sierra Logo

Related Topics:

650 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

75822 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...