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Service 4wd error message - Silverado 1500HD Chevrolet Cars & Trucks

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Might be a vacuum leak, might be a loose actuator onthe transfer case, it might be hub not releasing. This last one can be checked by putting vehicle in 4H, then with transmission in neutral, back to 2H, and then back the truck in a straight line about 20 feet. This would release the hubs fully in most cases. If the light goes out, the hubs are getting are worn.

Posted on Feb 15, 2012

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4 wheel will not work. the selector switch will show it is in but front tires will not engage No messages on control center


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Jan 21, 2016 | 2008 Chevrolet Tahoe LTZ

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Have 2004 Chevy1500z71&service 4wd message comes onafter it in 4H but it still worksHad fluids changed 2 yrs ago.Goes into 4wdfine&seems like it runs good. Comes on sometime even not in 4wd. Thanks


Which transfer case does your truck have ?
SERVICE 4WD
Refer to
?€¢
Transfer Case Description and Operation for the Transfer Case - NVG 149-NP3


?€¢
Transfer Case Description and Operation for the Transfer Case - NVG 246-NP8


?€¢
Transfer Case Description and Operation for the Transfer Case - NVG 261-NP2


?€¢
Transfer Case Description and Operation for the Transfer Case - NVG 263-NP1


The SERVICE 4WD indicator is located in the instrument panel cluster (IPC), and shares the common power and ground of the IPC. The transfer case shift control module controls the service indicator by sending the IPC a Class 2 message. This indicator may be controlled with the scan tool using the IPC device controls.
You should take it to the dealer an have it checked for DTC'S -diagnostic trouble codes

Jan 07, 2016 | Cars & Trucks

2 Answers

Why is the service 4WD message on all the time and diff lock light flashes and dos not lock?


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Hummer h2 2003 55000 mill ... service 4wd the liht is on all time Remote the battery wire from the car for 20 ... My 2006 H3 will not come out of 4 wheel drive?

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Service 4wd bad accelerator


Hi there:
The FDCM has a code, and for me to be able to correctly diagnose your vehicle..You will need to get that code retrieved by a scantool.\.

The service 4WD indicator gives an indication to the vehicle operator when the Final Drive Control Module (FDCM) has recorded a Diagnostic Trouble Code (DTC) for an electronic transfer case circuit or component malfunction. This indicator is controlled by the instrument cluster logic circuit based upon cluster programming and electronic messages received by the cluster from the FDCM over the Controller Area Network (CAN) data bus.

The service 4WD indicator function of the reconfigurable dot matrix Organic Light Emitting Diode (OLED) display unit is completely controlled by the instrument cluster logic circuit, and that logic will only allow this indicator to operate when the instrument cluster receives a battery current input on the fused ignition switch output (run-start) circuit. Therefore, the OLED service 4WD indication will always be OFF when the ignition switch is in any position except ON or START. The instrument cluster will turn ON the service 4WD indicator for the following reasons:

Service 4WD Indicator Lamp-On Message - Each time the cluster receives an electronic service 4WD indicator lamp-ON message from the FDCM, the service 4WD indicator will be illuminated. The indicator remains illuminated for about five seconds, until the cluster receives a lamp-OFF message from the FDCM, until the cluster arbitrator logic determines that another display request has priority, or until the ignition switch is turned to the OFF position, whichever occurs first.

The FDCM continually monitors the electronic transfer case control circuits and transfer case shift motor/mode sensor assembly to determine the condition of the system. The FDCM then sends the proper lamp-ON or lamp-OFF message to the instrument cluster, also known as the Cab Compartment Node (CCN).

For proper diagnosis of the FDCM, the CCN, the CAN data bus or the electronic communication related to service 4WD indicator operation a diagnostic scan tool is required. Refer to the appropriate diagnostic information.

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Jun 23, 2012 | 2000 Chevrolet Blazer

1 Answer

Service 4wd message keeping coming on. A part was replaced a year ago as it was locked in 4wd, now all lights come on when started like they're supposed to, but every once in awhile the service 4wd...


SOUND LIKE TRANSFER CASE CONTROL MODULE FAULTY. BEST TO LET DEALERSHIP CHECK IT OUT SINCE THE TRANSFER CASE AND TRANSMISSION IS TCM PCM CONTROL YOU NEED DIAGNOSTIC EQUIPMENT TO FIX.

Oct 15, 2011 | 2005 Chevrolet Avalanche

1 Answer

4WD SERVICE


it means it is time to change the fluid in your transmission, and 4wd transfercase.
as well fluid levels in differential should be checked as well as greasing anything that can be greased.
that signal is tripped either from mileage reaching a certain amount, or a sensor giving poor results (usually low or contaminated fluids)

Jun 16, 2009 | 2005 GMC Sierra 2500HD 4WD

1 Answer

GMC Sierra "Service 4WD" message


You should be fine to drive it home, as long as you don't drive it like that all year. There are a few things that activate the 4WD and one of the components has a failure and needs to be addressed. Good luck and hope this helps.

Jun 15, 2009 | 2005 GMC Sierra 2500HD 4WD

2 Answers

Service 4wd switch


remove switch and spray it with contact cleaner, insure the switch is operational and 4wd engages, it may be dirty, when completed disconnect battery for 15 min and see if message comes up again.

Nov 08, 2008 | 1996 Jeep Cherokee Country

1 Answer

Message center states service 4wd


not sure about the fuel gauge, but I am willing to bet you need a new 4wd switch. This is pretty common on these trucks.

The fuel thing might be a bad cluster. This is also a common problem on the gm vehicles. I have 2 silverados, an impala and a malibu and they all have had funky problems with the clusters.

Brew

Jun 13, 2008 | 2000 Chevrolet Silverado 1500

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