Question about 2004 GMC Sierra

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Service 4WD appears on my dash instrument while driving in 2WD.

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You need to let us know the codes it has. I'd bet it has a C0327, which is your encoder motor. They are not cheap, just a little warning.

Posted on Jul 01, 2009

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2002 ford ranger - Where is the 4x4 actuator located


On the transfer case
Transfer Case - Electronic Shift
The four-wheel drive electronic shift-on-the-fly feature electrically shifts the vehicle transfer case between 2WD, 4WD HIGH, and 4WD LOW. The system mode is selected by the operator through the mode select switch (MSS) on the instrument panel. The operator is informed which mode the system is in by two instrument cluster indicators: one for 4WD HIGH which appears as 4WD, and one for 4WD LOW, which appears as 4WD LOW. Shifts into 4WD HIGH can be made at any speed. When shifting into 4WD HIGH with the vehicle stationary, tooth blockage may occur preventing shift completion. When the vehicle is driven above 8 km/h (5 mph) the shift will complete. When shifting in or out of 4WD LOW, the four-wheel drive (4WD) control module requires that the vehicle speed be less than 5 km/h (3 mph), the brake pedal be applied, and the transmission be in NEUTRAL (automatic transmission) or the clutch pedal be depressed (manual transmission).
The gearmotor encoder assembly is mounted externally on the transfer case. It drives a rotary cam which moves the mode fork and range fork within the transfer case between the 4WD HIGH, 4WD LOW, and 2WD range positions.
The four-wheel drive (4WD) control module controls the gearmotor encoder assembly that shifts between 4WD HIGH, 4WD LOW, and 2WD modes.

Mar 17, 2017 | Ford Cars & Trucks

1 Answer

2004 Tahoe stuck in auto 4wd and service 4wd light is on


switch on dash can cause this but the transfer case control module is the culprit most times.try disconnecting battery this will should reset the TCM.see what happens.worst case senereo is bad transfer case

Dec 10, 2013 | 2004 Chevrolet Tahoe

1 Answer

Jeep stuck in 4wd High


For troubleshooting these issue,Few related help links are provided below.Click the link below and go through its troubleshooting procedure:----Jeep 4WD Idiot Light is ON? http://technoanswers.blogspot.in/2012/06/2002-jeep-wrangler-4wd-idiot-light-is.html
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Service 4wd warning light on Dash? http://howtobyme.blogspot.com/2011/11/service-4wd-warning-light-on-dash.html
---------------Car automatically switches to 4wd low? ------------Car will not go into 4WD high or 4WD low? http://schematicsdiagram.blogspot.com/2011/12/car-will-not-go-into-4wd-high-or-4wd.html
----------
No 4x4 light on dash?

http://repairhelpcenter.blogspot.com/2011/12/no-4x4-light-on-dash.html

---------------
4 wheel drive system will not disengage?

http://technoanswers.blogspot.com/2012/01/4-wheel-drive-system-will-not-disengage.html

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4WD light is flashing and beeping? NO 4WD high? http://schematicsdiagram.blogspot.in/2012/02/4wd-light-is-flashing-and-beeping-no.html
----------------This will help.Thanks.

Jul 17, 2012 | 1988 Jeep Cherokee

1 Answer

How to get a push button four wheel 96 jimmy out of four wheel drive


take the switches 2wd 4wd hi 4wd lo out of the dash and unplug them all then use small wire to jump the 2wd connectors then replace new 4wd button and new 2wd button

Mar 16, 2011 | GMC Jimmy Cars & Trucks

1 Answer

Service 4wd light is coming on but 4wd works fine


i had the same problem in my 99,i replaced the switch assembly on the dash and all is well,hope this helps

Sep 01, 2009 | 1999 GMC Sierra

1 Answer

Service 4wd light


what causes the 4wd to kick in when you have it in 2wd

Mar 13, 2009 | 2004 GMC Yukon

1 Answer

03 Chevy Tahoe Z71 - 4wd not functioning


my son has one and his did that and it was a fuse he put a new one in and it is working good now

Jan 14, 2009 | 1999 Chevrolet Blazer

1 Answer

Service 4WD


service it like you would the truck engine it will have to be reset by the book almost like the truck i had that same problem

Oct 27, 2008 | 2003 GMC Sierra 1500

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