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99 gmc all the lights on 4 wheel drive control are lit up

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GMC What ?
Which one of these does your vehicle have ?

Transfer Case - BW 4401 (Two Speed Manual)
Transfer Case - BW 4470 (Two Speed Manual)
Transfer Case - NVG 241-NP2 (Two Speed Manual)
Transfer Case - NVG 243-NP1 (Two Speed Selectable)
Transfer Case - NVG 246-NP8 (Two Speed Automatic)

Posted on Dec 15, 2016


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2 Answers

When I drive my 2002 gmc envoy sl 4 wheel drive it rocks from side to side what's wrong with my vehicle.

Are there any lights lit on the dash when this happens ?
SERVICE 4WD: , OVERSPEED , ABS: etc... To eliminate possible problem with the electronic control modules you should have the vehicle checked for DTC'S diagnostic trouble codes in all modules on the vehicle . A code reader for OBD2 codes will not do it .You would need a professional grade scan tool ! Without seeing first hand , it sounds like a problem with the stability control or traction control ,ABS ! I suggest you take it to a ASE certified repair shop that can check it out !

Sep 21, 2015 | GMC Cars & Trucks

1 Answer

I have a 99 gmc sonoma truck 4 wheel drive and it will not come out of 2 wheel drive.

If it has the push button controls on the dash I have had those fail frequently. A lot of times you may push the button and the light may blink and then still stay in 2wd. That switch is also the control module for the 4wd. If it is the know select you need to check for power at the actuator on the transfer case.

Nov 08, 2014 | Cars & Trucks

1 Answer

Service 4 wheel drive

You need to have the drivetrain controller scanned for codes, then correct the fault.

Jan 25, 2014 | 2006 Isuzu i-350

1 Answer

I have a 99 GMC Jimmy with the 4 wheel drive. I

check fuse and relay to switch if power to switch retest switch new doesnt mean not defective if no power check connections and wiring for damage or breaks

Dec 02, 2009 | 1999 GMC Jimmy

1 Answer

Stuck in 4 wheeldrive

Have you gotten a service light? Sometimes these electronic things just freak out. It might be as simple as a new switch. There is a motor on the transfer case that is responsable for moving the levers in the case that use to be done by a lever from inside the truck. I think it may be possible to remove this motor and replace it with a lever. I would check into this by calling a local 4x4 shop, or a mechanic that specializes in 4x4 vehicles.

Jun 19, 2009 | 2000 GMC Jimmy

1 Answer

4x4 still not working

you could have problems in the shift control module.or faulty switch in dash.

Jun 04, 2009 | 1999 GMC Sierra

2 Answers

99 gmc 4 wheel drive

transmission has to be in nuetral to go back out of 4low

Jun 06, 2008 | 1999 GMC Sierra

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