Question about 2005 Chevrolet Silverado

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2005 tahoe will not blow air in the front when at idle or setting still. Setting still you can run 2000 rpm still will not blow. When you start moving about 20 mph it will blow but only 1 speed (about mid speed) no matter what you set the controls on. Slow down to stop and it stops blowing. The temp control works so if you set it on 60 degrees it blows cold on 75 it is warmer. If you turn teh heat on it blows hot but only when moving and you can not control the fan speed. Rear air works fine.

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  • Chevrolet Master
  • 8,511 Answers

This model has a weak connector on the blower resistor. Remove the hush panel on the passenger side and disconnect the resistor. Look for signs of melting on the connector plastic near the ground terminal. The resistor may also have failed. I have the wiring diagram somewhere if you need it.

Posted on May 23, 2017

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Posted on Jan 02, 2017

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SOURCE: 2001 tahoe front heater not working, rear heater blows warm air

Notorious for plugged heater cores. Also updated plastic restriction couplers mounted at heater core available from dealer. Try back flushing heater core. Run engine till its at operating temperature then carefully hold the inlet and outlet hose breifly with heater fan on high if hoses are nearly the same temp then flow is good , if not then core is plugged.

Posted on Jan 18, 2009

aaangie220
  • 202 Answers

SOURCE: 2004 suburban rear a/c only blows hot air

ase mechanic:
there are separate actuators for the blend doors. one for heat and one for cool. they work opposite and in conjuction with each other, if that makes any sense. ones open, ones close, for each different climate. sounds like the the cold one isn't opening in the rear.

Posted on Jan 29, 2009

jagjeffery
  • 318 Answers

SOURCE: 2004 Chevy Silverado AC is blowing warm air on passenger side.

You have dual zones that are controlled by temperature actuators the passenger side has lost its memory or has gone bad you can put it in self programming by disconnecting the battery for ten minutes then hook it back up start the truck turn the temperature control on but do not touch any other controls let it go thru the self programming for about 6 to 7 minutes then select your temperature you want if it still does not work properly you may have a bad actuator or a bad connection at the actuator

Posted on Jun 03, 2009

  • 54 Answers

SOURCE: 2004 chevy tahoe, dual climate control, blowing different temps

Its more then likely the temp door broken or temp door motor broken/stuck. There is 2-3 of these motors under the dash on the side of the evap/heater core box. Some require extensive labor to replace, good luck

Posted on Jul 29, 2009

  • 540 Answers

SOURCE: 2005 tahoe no air blowing

as long as all the fuses are good.. its probably the blower resistor/module... located next to the blower motor under the pass. side of the dash..

Posted on Oct 13, 2009

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1 Answer

High Idle at Start Up


This sounds like the RPM may be a little high, but normal operation is called a "cold start routine". Like the old fashion Choke, the "cold start routine" is suppose to increase the RPM for several minutes and then decrease to running idle speed. This will engage in each "cold" start, but not on a warm engine. It is designed to do this.

Usually when an engine runs higher RPM than it is set for, it means extra air is entering the engine from somewhere. Using a spray water filled bottle, go around seams and also spray vacuum lines and the EGR pod while the engine is running. Any openings will draw in the water and affect RPM. Then you will have found the leak.

Now you can look up you exact engine on the Web and find out 2 things. If it has a 2 piece intake manifold and if it has intake Manifold runners. The 2 piece design often failed when the gasket holding the 2 halves started dissolving. The intake runners, could stick out of position and make RPM higher.

Now aside from these 2 items, you might get a Code showing that the engine is running lean. This would actually not be showing the lack of fuel, but the overabundance of air coming from the leaks.

Jan 30, 2014 | 2005 Ford Escape XLT

1 Answer

2005 Tahoe AC


Usually a sign one of the blend doors under the dash is stuck or not working correctly.

Jun 08, 2013 | Cars & Trucks

1 Answer

My 2000 Chevrolet Tahoe 5.3 L is idling at 1300 rpm when traveling above 15 mph and then it goes down to a normal 600 rpm when it comes to a stop. The only way to tell it is doing this is to put it in


Remove the air filter,spray with special spray( mass air flow cleaner) in spray can the Area round the Bodie throttle unit with engine off press ful throttle down spray and wipe the valve this spray is ok for any sensors, 2nd start and stay1500to2000RPM and spray in tothe inlet manifolt only for one 2 seconds repeat that 8 to 10 times and lisen to your idling .if you not resolvethe problem, You may have to look in the engine portion of the calibrationif not then update the PCM calibration to the latest one calibrationn. Oring of idle control valve damage or valve

Sep 29, 2012 | 2000 Chevrolet Tahoe

1 Answer

2005 Colorado RPM's flucuate from normal RPM down to 500 rpm usually after I first start the truck. Then after running for 10-15 minutes this issue goes away. The truck starts fine. This problem only...


Could be the IAC(Idle air control valve). It could also be related to the IAT(Intake Air Temperature) sensor. The IAC should be in the throttle body and the IAT in the intake manifold.

Dec 28, 2010 | 2005 Chevrolet Colorado

1 Answer

2005 Tahoe-just installed new battery, driver side air blows hot while passenger and rear air blow cold.


you have lost A/C and heater calibration , disconnect the battery for 10 minutes then hook back up start the truck turn the climate control back on do not touch any other button for 5 to 6 minutes let the ecu reprogram then set your temp setting and it should work fine

Jun 06, 2009 | 1998 Buick Regal

3 Answers

NO HEAT AT IDLE


I would almost garuntee you have a bad water pump. When water pumps get old there turbines can wear off and even though they may still be there they want be as efficient. When this occurs you can normally rev the vehicles r.p.m. to about 2000 rpm and the heat will start working.

Apr 18, 2009 | 1996 Chevrolet Tahoe

1 Answer

2001 tahoe front heater not working, rear heater blows warm air


Notorious for plugged heater cores. Also updated plastic restriction couplers mounted at heater core available from dealer. Try back flushing heater core. Run engine till its at operating temperature then carefully hold the inlet and outlet hose breifly with heater fan on high if hoses are nearly the same temp then flow is good , if not then core is plugged.

Jan 18, 2009 | 2001 Chevrolet Tahoe

6 Answers

2001 tahoe front heater not working, rear heater blows warm air


I have the same problem with my 2001 Tahoe. The front blower is working, its blowing strong, but its cold air even with the temp setting as high as it can get. The rear blows hot air. The engine temp guage is at about 210ish which is close to being normal (220). I just replaced the thermostate a few months ago, I don't know if its bad again, or it I deluted the antifreeze too much and it frooze the heater core, or if the heater core just went bad. Any one know what the cause could be?

Jan 05, 2009 | 1998 Chevrolet Tahoe

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