Question about GMC Sierra 1500

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GMC Sierra 4x4 with G4 transmission fails to engage transmission once normal operating temperature is reached. What could cause this?

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2004 GMC SIERRA 1500 TRANSFER CASE FAILS

Posted on Sep 04, 2011

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First check oil level,if oil level is ok change oil filter and oil get a trany flush hope this does it if not it is your tany

Posted on Jul 22, 2009

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Transmission will only shift in 4 low,no codes showing


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Nov 03, 2015 | Cars & Trucks

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My 1994 gmc will not engage in 4x4


replace switch under truck, light may need replaced also, when you put shifter into 4x4 h, place your trans lever into drive, then move forward, 4x4 will engage.

Feb 15, 2013 | 1994 GMC Sierra

1 Answer

2000 Gmc sierra sle 1500 on the floor 4x4, 4x4 engages but nothing to the front wheels, the drive shaft spins, but still nothing, any suggestions?


Sounds like you need a front axle actuator. This actuator bolts to the side of the front differential housing. It is electrically engaged. You can purchase them online starting at about $40

Jun 03, 2012 | 2000 GMC Sierra

1 Answer

MY 2000, GMC SIERRA SLT IS OVER HEATING. I THINK I HAVE IT NARROWED DOWN TO NOT HAVING THE CORRECT ANTIFREEZE MIXTURE. THE THERMOSTAT OPENS WHEN IT REACHES NORMAL TEMPERATURE & AT IDLE STAYS IN THE...


Not having the correct ratio of water to coolant wouldn't cause the problem your describing. Since it is a General Motors product, are you sure it has 'DexCool" in it? Some aftermarket coolants are not compatible with DexCool and will cause the cooling sytem to "clot" up..

Overheating under load would indicate to me that the coolant flow is impeded. Could be a clog in the radiator, faulty thermostat or a rarity, the impellers of the wter pump have failed.

Jul 09, 2011 | 2000 GMC Sierra

1 Answer

I have a 93' sierra 6 cylinder 2 wheel drive, once engine warms up it sputters and loses power. If you shift from drive to reverse it stalls and won't start. When engine has cooled it starts like a champ...


The problem may be the engine coolant sensor. If the sensor fails the engine will stop when normal operating temperature is reached . When engine is cold it will start.

Jan 20, 2011 | 1993 GMC Sierra

1 Answer

05 Sierra 4x4 wont shift into OD until it has warmed up for a while, this only happens when there are sub freezing temps, is this a problem, and if so what should i do??


This is normal on newer vehicles. The transmission temperature is monitored and overdrive is held off until the transmission is up to temp. Nothing unusual or wrong with this. My Tundra does the same thing. The trans temp gauge gets to about the 1/4 mark before the overdrive kicks in.

Dec 14, 2010 | 2005 GMC Sierra

1 Answer

How do i check the transmission fluid in a 1997 gmc sierra


Transmission Fluid Fluid Level Checking
  1. Operate vehicle for 15 minutes or until the transmission fluid reaches a temperature of 180-200°F (82-93°C).
  2. Ensure vehicle is on a level surface.
  3. With brakes applied, move the shift lever through each gear range for about 3 seconds.
  4. Place transmission in PARK position.
  5. Set parking brake and allow engine to idle for 3 minutes.
  6. Remove the transmission fluid level indicator and wipe clean. Reinsert the indicator and give it a full twist until fully seated.
  7. Remove the indicator.
  8. Observe sides of the indicator. The lowest level reading must be within the hot cross-hatched area.

Nov 10, 2010 | 1997 GMC Sierra

1 Answer

I have a 2004 GMC Sierra. what is the normal


hi im wes
thermostat should open at 195 running temp should be 210

Mar 28, 2009 | 1993 GMC Sierra

1 Answer

90 GMC 5.7liter motor.Transmission will sometimes when put in drive not engage.If I wait a few minutes,it will engage and works fine after that.Mostly does this when outside temps are cold (28 to 40...


The filter might be clogged/old and the cold makes the fluid heavy. With the 700r4 transmission its always best to let it warm up for a few minutes.

Feb 24, 2009 | 1992 GMC Sierra K1500

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