2004 GMC Sierra - Page 9 - Answered Questions & Fixed issues

I believe there is a small motor with 2 springs in the below dash duct work, it may be right above the gas pedal (but I am not 100 % sure) it
contols where the air flows in the ducts. Some what of a damper affair. I have the same problem in my 95 Tahoe, it just seems to stick and often lets go after a few minutes. You may need to give it a little persuasion, but do it carefully because you may drop the two springs off and it may mean pulling the dash out. Lay on you back and locate the motoer and get a helper to move the setting from dash to foor to vent , but give about 45 seconds between each move give a little pull. WD 40 may help but just a liittle.

hope this may help Ron

Sadly, no. What has happened is that the tiny servo motor that moves the speedometer needle is failing. When I run into these we remove the dash assembly and send it out to be repaired, usually by a dealer although there are other companies that can do this too. Usually they replace all the servo motors and backlight bulbs during the repairs but make sure you ask if they do so just to be sure.

cables to the door loose or adrift

Turn the key on,and press the gas pedal three times slow,within five seconds

use a AA battery and touch the wires in the back of the radio that are paired and then listen to hear the popping and crackling sounds from the given speaker it causes no damage and its a good way to find rear and front left and right.then label them.

if there was a recall the dealer would have told u, they are required by law, so most likely the problem is not under any type of free program, I don't know what work needs to be done exactly, without the labor time and the parts that need to be replaced I can't advise if the cost is high or otherwise.

I can only advise you as to the replacement of a 2002 Sierra, under the dash behind the glove box compartment is a plastic panel held on with four screws, remove this panel and the cabin air filter should be easily identified and replaceable, if you purchase a filter from an Auto Zone Auto parts store or a similiar parts store, they will advise you of whether your vehicle is equipped with the filter/filters and also where its location will be.
Some vehicles are equipped with (two) cabin filters, and also I am told that if you purchase an OEM part(Original Equipment Part) instructions are to be included in the box to further assist you.

underneath connected to frame rail driver side.

Go to carhelpsite.com it is free as long as you click on 2 of the ads at the website then your questions will be answered by an ASE certified mechanic,you don't have to buy or fill out anything on the ads,so help keep the site free.

If you've replaced the actuators and they are working.
One of the blend doors may be broken inside the heater box. To repair or replace the broken door you
have to remove the heater box. This is not a small job. The book gives 6-7 hours for the job. There is a
cheat that I've heard good things about. I guess it can
be done in a fraction of the time. You can find out
about it at heatertreater.net I have not used it myself
but I know somone who has. And it worked well for
him. Hope this helps.

I imagine that they tried jamming a screw driver or something into the ignition. You will most probably need a new key and tumbler

This should help

Go below steering columb. Remove knee panel and catch a heavy guage red wire with test light. Should be hot with key off. Use a ground in that area directly to metal. Also a good place to hide the unit.

maybe the seal there is damaged, have you taken the pump out?...if so, check and see if the ring that holds it in is tight too..

The smoke if it's white and goes away is just condensation in the exhaust system evaporating and the clicking noise could be the famous GM Piston slap. You can take it to the GM Dealer, there is an upgrade ECM program to help eliminate the piston slap noise when the engine is cold. You can also try adding some Lucas engine treatment to your engine oil to help with the piston slap problem. Start with that and hope it's not overdue for an oil change or low oil level in the engine.
Thank you for using Fixya

the dash clusters in the 03 -07 chevy 1500-6500 trucks have issues with their motors that are in the cluster. they work then don't, stick, jam, reset, etc. GM has a recall on these if your truck is privately owned and under 125000 KMs, Just contact the dealer to start and ask if you truck is included in this recall. If it isn't then you might want to find someone to repair it. we repair these unit often. good luck to you

There is no reset,you have to take it to a repair shop and get the codes read to see what is causing the light to come on.Usually just a sensor.When it is repaired the shop can use a scan tool to reset the light.This would be the the only way to reset the light.Hope this helps.Good luck.

there is only one or two bolts the rest are clips the bolts are visible with the hood open under the plastic cover which has the pop pins. once the blots are out you have to work your way around it pulling the clips out just take your time and be carefull

if this water is coming out of your tailpipe more than a minute check your engine oil for contamination of coolant. you may have a bad head gasket

remove the intake manifold ,remove radiator ,remove radiator intake and outake housing, remove fan ,remove all belts: power steering, alternator and if you have a/c, remove harmonic balancer ,remove timing belt covers, remove timing belt remove intake housinng once you have remove all the above, your freaken engine will look naked, you can see the location of the knock sensor is locate in the engine valley