Question about 2005 GMC Sierra

2 Answers

2005 GMC Sierra heater blowers work fine but only blows cold air until you start into a good continuous acceleration. It blows cold though no matter how long the truck sits idle after cranking. Never done this before in 3 years ownership. What could the problem be?

Posted by on

Ad

2 Answers

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 9 Answers

Check the coolant level in radiator. if its low it will only circulate while driving, and not while idling. May also be a bad water pump. See a professional for that.

Posted on Nov 08, 2010

Ad
  • 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
  • 41 Answers

It is possibly your thermostat it may be stuck open or just isn't working it is a very inexpensive fix

Posted on Nov 08, 2010

Ad

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.
New users get to try the service completely Free afterwhich it costs $6 per call 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

Why does a/c only blow whil vehicle is in motion?


you have a problem with the heater/a/c controls there obviouly stuck on a/c you will need to strip out the control panel to see why the direction/vent , hot/cold , fan speed controls are not working , before doing this have you checked the fuses as there may be a seperate fuse for the control panel ,if this all checks out take to an a/c specialist as you dont want to mess around with a/c gasses etc

Apr 30, 2014 | 2005 GMC Sierra

2 Answers

2005 gmc sierra. blower does not work on any setting but i can feel temperature settings work right at the vents. want to diagnose my blower. where do i start?


First check that the blower has power to it and when turned on a varying ground signal when the speed switch is moved between the speeds. You will need a DVOM to test this.

Mar 19, 2014 | 2006 GMC Sierra

2 Answers

My 2005 chevy avalanche only blows cold air until i drive then when I stop cold air Agian


One of two things has happened. Either your coolant has gotten really low (easy enough to check) or you heater core is starting to plug up.

Oct 14, 2012 | 2004 Chevrolet Avalanche

1 Answer

I have a 2005 GMC Sierra regular cab. 4.3 v6 The heater has only been blowing cold air. Checked coolant and replaced the thermostat. No change. AC worked fine this summer. Heat worked fine last...


sounds like you have a bad temperature door actuator. This is a motor that connects to the door and uses inputs from the sensor in itself and the heater control module to open the door from hot to cold. I does take some knowledge on recalibrating this actuator and installing it. if it isn't install correctly it could damage the new part, so just take care

Sep 16, 2011 | 2005 GMC Sierra

1 Answer

Heater only blows cold air 2004 gmc 1500 SLT then will work and then stop. vent controls and ac work fine


Check your rad and make sure it is full. Wait til truck is cold before removing rad cap.

May 05, 2010 | 2005 GMC Sierra

2 Answers

2005 GMC Sierra 1500 - heater blows, but only cold air


Check coolant level. Check for heat at the heater hose going from water pump to heater core at firewall. Check to see that cable is moving coolant control valve from the closed to open position. Low mileage so it shouldn't be plugged heater core.

Jan 07, 2010 | 2005 GMC Sierra

1 Answer

2005 GMC Sierra Denali - Installed new battery; driver a/c hot


need to go to dealer to have HVAC module reprogramed. whenever diconnecting battery power on these vehicles you can connect a 9 volt battery between neg and pos to keep the memory in the computers. I am an master ase technician and 5 classes from gm world class tech.

Jul 15, 2009 | 2004 GMC Sierra

1 Answer

2004 GMC Sierra Heater does not heat on low RPM


check your coolant level on the radiator

Feb 03, 2009 | 2000 GMC New Sierra 1500

1 Answer

Ac will not blow


wiggle the blower resistor wire harness it is next to blower motor bad about connector melting

May 25, 2008 | 2005 GMC Sierra

Not finding what you are looking for?
2005 GMC Sierra Logo

545 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

76630 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

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

Answer questions

Manuals & User Guides

Loading...