Question about 2003 GMC Sierra 2500HD

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2003 gmc 2500 hd 4wd not engaging. Replaced actuator valve and still not engaging

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Try the diaphram and cable

Posted on Feb 02, 2010

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Chevy 2002 2500 series, 4x4 will not engage, when shifted into 4wd a kind of grinding noise comes from the front like gears are not meshing.


No hubs on 2002 Chevy 2500. I'd check the front axle actuator (engages front axle when 4WD is engaged). Belive it's on the passage side axle tube of front differential. Could be wrong, but that's what it sounds like. Or the front ring/pinion is shot. They don't turn when not in 4wd.

Apr 08, 2015 | Cars & Trucks

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Reset service indicator


When the 4WD Service light comes on it means that the Transfer Case Control Module (TCCM) has not received the proper feedback from the two actuators that control the 4WD engagement. The system needs to be diagnosed by a technician.

Apr 06, 2014 | 2003 GMC Envoy Xl

1 Answer

The 4wd will not engage.


Most likely the front axle actuator,unhook it ,unscrew it from the axle ,then engage the 4x4 ,see if the actuator extends,if not it will need replaced.

Jan 31, 2012 | 1995 Chevrolet C/K 2500

1 Answer

1993 chevy pickup 2500 4 wd. 4 wheel drive will not engage. replaced actuator. still did not engage. replaced 4wd switch on transfer case. still does not engage. the 4wd indicator light comes on but it...


physically watch the actuator and have someone else activiate it. If it moves like it's supposed to...you could have a broke axle, third member or even the locking clips on one of the front hubs...

Dec 18, 2010 | 1993 Chevrolet K2500

1 Answer

2005 GMC 4x4 HD 2500 6.0 eng. rear axel seal


SEAL COULD BE LEAKING CAUSE YOU DIDNT LUBRICATE THE SEAL LIPS WITH PETROLEUM JELLY TO HELP THE THE SEAL LIP SEAL OR YOU DAMAGE THE SEAL WHILE DRIVING IT IN.AXLE FLANGE NUTS TORQUE IS 58 FT LBS THE AXLE HUB NUT TORQUE IS 177 FT LBS.

Jul 14, 2010 | 2005 GMC Sierra 2500HD 4WD

1 Answer

2003 gmc 2500 hd..horn doesn't work


The horn pad is made of vinyl which contracts through the four seasons causing this problem for some. Remove the horn pad with the battery disconnected first of all. Use a jumper wire to see if the horn works. If id does check the horn relay next. If ok hot wire the horn direct. One should be your problem or it is a broken wire instead

Apr 04, 2010 | 2003 GMC Sierra 2500HD

1 Answer

I have a 2001 GMC Sierra Pickup that has electronic 4WD that will not engage. If you press the buttons to enter from 2HI to 4HI, 4LO, Etc. the choice of the button changes (lights up) but the truck does...


fullyjr.

Engaging from 2WD - 4HI/Lo requires movement of the vehicle. very low speed under 5mph, push button should engage. the vehicle has to be moving.

Feb 04, 2010 | 2001 GMC Sierra Crew Cab

3 Answers

4 wheel drive will not engage on my 1989 gmc sierra 2500?


actually that first soultion is wrong it is correct on smaller pickups but on the full size pick ups they use a differnet sytem
there a electric actuator on front axle
there be two elctrical plugs on front axle u want the bigger of the two other one is just to turn the 4 wheel drive light on
un plug actuator then remove actuator after it removed plug it back in but leave it out of axle turn key on and shift down to 4 wheel drive the actuator should move out if it dont that your problem if i does move this isnt your problem it either the tranfer case or in front axle

Jan 07, 2010 | 1989 GMC Sierra

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