Question about Chevrolet 2500

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93 4x4 auto-tranny. When I shift into 4 wheel drive the light does not come on and the front wheels don't engage. I tried it in 4hi and 4lo, can hear gears engage but still no front wheels engaging.

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  • camk432 Feb 03, 2009

    I have a 90 K1500 w. pretty much the same problem. i already checked the plunger and there is power to everything. the front driveshaft is locked in but the axels arent. maybe i could use a diagrahm?

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  • 393 Answers

Check the hubs the grease gets old and binds up instead of sliding(makes it hard for gears to mesh

Posted on Dec 19, 2008

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  • 247 Answers

Do you have outside locking hubs?

Posted on Dec 19, 2008

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1 Answer

4 wheel drive won't engage


Which do you have ?
Transfer Case - NVG 236 (Two Speed Automatic)
Transfer Case - NVG 233-NP1 (Two Speed Selectable)
The NV236 transfer case is an automatic transfer case with three drive ranges. Shifting from rear wheel drive to four wheel drive is done automatically when the transfer case shift control module receives wheel rotating slip information from the speed sensors. The transfer case shift control module then engages the transfer case motor/encoder to position the transfer case from rear to four wheel drive. When the transfer case shift control module receives information that the wheel rotation is the same on both axles, the transfer case shift control module sends position information to the motor/encoder to put the transfer case back into rear wheel drive. The three drive ranges are 2HI, 4HI, and 4LO. The 2HI position is for normal driving with the rear wheels pushing the vehicle. The 4HI, position is for driving through sand, snow, mud, gravel, or heavy rain at normal or slightly below normal speeds. The 4HI engages the front axle to allow for four wheel drive. The front axle is pulling the vehicle, and the rear axle is pushing the vehicle. The 4LO range is used for off road driving, heavy snow, deep mud, or shallow fording. The 4LO is similar to the 4HI except that the gearing in the transfer case is set for low speed and high torque. The NV236 is manufactured at Syracuse New York by New Venture Gear a division of New Process Gear for General Motors.
Is the switch light on or flashing ? If you have automatic 4x4 there are several DTC'S that can set >
DTC B2725 ATC Mode Switch Circuit Malfunction DTC C0300 Rear Speed Sensor Malfunction DTC C0305 Front Speed Sensor Malfunction DTC C0308 Motor A/B Circuit Low DTC C0309 Motor A/B Circuit High DTC C0310 Motor A/B Circuit Open DTC C0315 Motor Ground Circuit Open DTC C0323 T-Case Lock Circuit Low DTC C0324 T-Case Lock Circuit High DTC C0327 Encoder Circuit Malfunction DTC C0362 4LO Discrete Output Circuit High DTC C0367 Front Axle Control Circuit High DTC C0374 General System Malfunction DTC C0376 Front/Rear Shaft Speed Mismatch DTC C0387 Unable to Perform Shift DTC C0550 ECU Malfunction DTC C0611 VIN Information Error

Dec 01, 2015 | 2000 Chevrolet S-10

1 Answer

2007 chevy trailblazer won't go into 4 wheel drive


Have you had codes checked ? While connected to a good scanner that will check transfer case switch to show if switch is working, and it could be the switch on the side of the transmission.

Feb 10, 2014 | Cars & Trucks

1 Answer

How to properly engage and dis-engage 4 wheel drive 0n 1996 gmc sierra


  • Shifting from 2HI to 4HI Press and release the 4HI button. This can be done at any speed, and the front axle will lock automatically.

  • Shifting from 4HI to 2HI Press and release the 2HI button. This can be done at any speed, and the front axle will unlock automatically.

  • To shift from 2HI or 4HI to 4LO, the vehicle must be stopped or moving less than 3 mph with the transmission in NEUTRAL

  • Hope this helps.

Oct 29, 2011 | 1996 GMC Sierra

2 Answers

HOW TO USE 4 WHEEL 1980 CHEVY K20 PICKUP


have truck running,,put shifter in neutral,,shift into high lock 4x4,then put truck into gear,,u can shift from high lock to high gear,,from two wheel to four wheel,,in high only,,if u want to shift transfer case in low,,u have to put truck in ,,neutral,,first,,

Feb 06, 2010 | Chevrolet K2500 Cars & Trucks

3 Answers

HOW DO I PUT A 1998 GMC JIMMY IN 4 WHEEL DRIVE?, DO I HAVE BE IN "PARK" OR CAN I CHANGE IT INTO 4 WHEEL DRIVE WHILE IM DRIVING?


You should be able to put in 4x4 while in drive less than 35mph. Mine had a switch to turn to engage or dis-engage.

Oct 15, 2009 | 1998 GMC Jimmy

1 Answer

4HI and 4LO light flashing 2000 Blazer LT


it is very possible that a wheel speed sensor is open or reading erratic, causing the ECM to override the 4WD switch. Borrow/rent/buy a scanner that will tell you this info,

Jul 15, 2009 | 1997 Chevrolet Suburban

1 Answer

98 K1500 suburban, can not engage 4wd, HI or Lo runs otherwise


your doing it right but your accuater is bad 59.00 auto zone easy install

Feb 23, 2009 | 1998 Chevrolet Suburban

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