Question about 2005 Chevrolet Silverado

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2005 chevy 2500 4wd won't go into 4wd. I changed the actuator for the auto hub locks and still nothing. It is the w/t model with the shifter on the floor. The shifter seems a little softer, when I shift into 4wd, but it does shift and the 4wd light comes on, but it does not engage. no 4 low either. Is there any other switches or anything?

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It will be the actuators on the transfer case
check electrical connections , actuators and any vacuum hoses

Posted on Oct 28, 2017

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Posted on Jan 02, 2017

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brandond1981

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SOURCE: 2005 chevy 2500 4wd won't go into 4wd. I changed

2000 has a 3 wire sensor on the top of the transfercase that sends power to the actuator

Posted on Mar 01, 2011

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Can't get my 95 Geo Trackers 4WD to work. The indicator light works still but the wheels themselves won't engage. Can anyone plz help me out with what might be my problem?


For Trackers (and Sidekicks) of this era (1989 to 1998) the front axle locking device is a locking hub on each front wheel. (There are no actuators until the model change in 1999.) Locking hubs come in two flavors, Manual and auto locking hubs. A look at the from wheel should tell you what you have. Manual hubs have a knob like lever with the word "lock" and "free." Auto hubs say "Auto-Locking" right on them. Both types of hubs require servicing periodicity. (Normally annually.) This means removing and disassembling. Then cleaning and light greasing before reassembling. There are some good videos on the web on how to service the manual hubs. Auto hubs are a little harder to ensure they are working properly, but some people like them. (Not me.)

Please note two things:
1. Due to differential action, BOTH hubs need to be locked for any power to be applied to the front wheels.
2. Trackers of this era are PART TIME 4x4, NOT all wheel drive. They have nothing providing for different wheel speeds front to back like a center differential. This means they should NOT be used on non-slippery surfaces like dry pavement. Beside causing handling and braking issues, it can destroy your transfercase driving on dry pavement in 4x4 due to what is called "driveline wind up".

PLEASE if you do not understand this, look it up... if you still do not understand, ask and do not use the 4x4 until you do.

Feb 18, 2015 | 1995 Geo Tracker

1 Answer

2005 Chevy Silverado 2500HD-LT 4-Door Crew Cab Pickup Truck


Probably is the actuator. Common problem. The actuator is part of the complete door latch. Hopefully that is what you got from 'Dorman'.

Sep 25, 2017 | Chevrolet Cars & Trucks

1 Answer

2005 Trailblazer XT won\'t go into 4WD. Front hubs don\'t engage with switch in cab. It will gear down to 4wd Lo but front wheels won\'t engage. Please help. Can\'t afford the dealer!


i've been told it was the 4wd actuator located on the passenger side near were the cv joint goes in to the front axle a good test is to floor jack it up so both wheels are off the ground and have someone on the other side , put in nutrual turn both wheels one way at same time and the 4wd drive shaft should turn if not its your actuator, costs about $86 for anew actuator and takes about 5 mins to change once you have the tire off

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2 Answers

I have a 96 chevy 4x4 and my front wheels aren't pulling. i replaced the acuator and still nothing. 4x4 light flashes in 4L and 4H. what could be the problem. is there auto locking hubs on that model...


no there is no auto locking hubs. 96 chevys have a ifs (independent front suspension) this give it more ground clearance but does not have lock out hubs, the cv axles go into the front differential an spin freely until you put it in 4wd, how this works is your transfercase spins the drive shaft that goes into the front differential an while you put it in 4wd it sends power to the actuator to lock the front differential. if your front end isnt pulling you either popped your 1 of your cv axles but if you did this you would know because it makes a very loud thunking noise while you're driving, my guess is you have a short thats not sending power to the actuator. check to see if the wiring harnesses are connected and check if the fuse that operates the 4wd in the cab of the truck is not blown. also actuators for these trucks are horrible they go out alot. also you can try reversing a few feet putting your truck in neutral an then try putting it in 4wd

Feb 11, 2011 | 1996 Chevrolet K1500

1 Answer

I got a 96 chevy 4x4 and my front wheels aren't pulling. i replaced the acuator and still nothing. everything sounds like it is engaging but no turning of the front wheels. do 96 models have auto locking...


96 chevys have a ifs (independent front suspension) this give it more ground clearance but does not have lock out hubs, the cv axles go into the front differential an spin freely until you put it in 4wd, how this works is your transfercase spins the drive shaft that goes into the front differential an while you put it in 4wd it sends power to the actuator to lock the front differential. if your front end isnt pulling you either popped your 1 of your cv axles but if you did this you would know because it makes a very loud thunking noise while you're driving, my guess is you have a short thats not sending power to the actuator. check to see if the wiring harnesses are connected and check if the fuse that operates the 4wd in the cab of the truck is not blown. also actuators for these trucks are horrible they go out alot

Feb 11, 2011 | 1986 Chevrolet K1500

1 Answer

I have a 93 chevy z71. I can't get the auto locking hubs to lock. My transfer chase works. But when i try to shift it into 4hi or 4low the 4x4 fuse in the fuse box will blow


The actuator down on the front axle is probably stuck, or shorted internally. You can prove this by unplugging the actuator (it's down by the diff. on the front axle) then try a new fuse and see if it still blows, there is a short in the wiring, if not it is the actuator causing the short.

Jan 19, 2011 | 1993 Chevrolet K1500

3 Answers

My 1984 GMC Jimmy has automatic hubs won't lock in, what do I do?


I use to sell these hubs everyday a decade ago. I had one customer buying up the cores so he could rebuild them. I asked what goes wrong with these and his reply was dirt mainly from lack of maintenance. They should be cleaned and regreased every year with new seals. Check you chevy dealer if seals are still offered

Feb 12, 2010 | GMC Jimmy Cars & Trucks

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