Question about 2004 GMC Sierra 2500

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2005 gmc sierra 2500hd 6.0 litter gas is overheating no steam and only when occasionally.The fluid level is good. The fan appears to be working

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Could be the thermostat is sticking, or the head gasket is going.

Posted on Jul 19, 2009


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I own a 2005 GMC Sierra which has been consistently low on radiator coolant and fluid level for a few months. There are no apparent leaks, have had the radiator looked at, but have not solved the...

look at the oil level and color if it is choco milk color probably head the engine noisy or fan. if fan? it is locking up because of the high heat from rad.normal. if engine possible coolant in the oil.

Jan 27, 2015 | 2005 GMC Sierra

1 Answer

My 2002 GMC 2500hd with an 8.1 eng has two history codes p0101 and p0700. How do I fix it?

if it's in the transmission other than ck'ing to see if you have proper level and quality fluid level in trans theres not much a homeowner can do your gonna need to find a good trans shop
1st try getting a fluid flush and fill this is a lower cost fix that sometimes works and you don't need to remove trans to do it

Sep 16, 2014 | 2002 GMC Sierra 2500HD

1 Answer


Have you checked to see if the cooling fans are coming on? Is the coolant level low? Could also be a weak water pump. Does the temperature gauge appear to work normally or do you go from low temp to high temp and then back to low rather quickly? If so, it could be a bad thermostat.

May 27, 2013 | 2005 GMC Sierra

1 Answer

2003 GMC Sierra shut down after Service Brake System

Good place to start would be to check fluid level and top it up as necessary, if light coming on when turning corners.

Nov 13, 2011 | 2003 GMC Sierra 2500HD

1 Answer

I have a 2002 GMC with a 6.0 liter engine, the power steering pump resevoir is leaking from the cap, seems to have built up pressure when you remove the cap fluid comes out, is there a chance that the...

Sounds like the fluid level is too high. Look at the cap it has a level incator on it, the proper level is on the lower part of it, it also has a cold level mark [ the fluid expands when hot ]. Remove some fluid to meet the proper level, a turkey baster works good.

Apr 12, 2011 | 2002 GMC Sierra 2500HD

1 Answer

Heater only works on levels 3-5 . Levels 1&2 nothing happens

sounds like the blower motor resistor is bad. it's located on the passenger side under the dash behind the blower motor itself. Just changed mine on my 2004 sierra. Fairly easy job to do. Hope this helps :)

Jan 28, 2010 | 2005 GMC Sierra 2500HD 4WD

1 Answer

I press my clutch and get no resistance and cant get into any gear? 2003 gmc sierra 8.1 4x4 2500hd 5 speed

Check fluid level in clutch master cylinder, if fluid is full then bleed clutch system.

If you still have no pedal resistance you will need a new master or slave cylinder for the clutch.


Oct 30, 2009 | 2003 GMC Sierra 2500HD

1 Answer

Antifreeze low level alarm when towing. even with thermostats out.

for 1 put the theromsata back in, next check clutch fan

May 25, 2009 | 2005 GMC Sierra 2500HD 4WD

1 Answer

2005 GMC Sierra overheating

Probably the thermostat.

Jan 03, 2009 | 2004 GMC Sierra 2500

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