Question about 2003 GMC Sierra

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The service brake system light comes on and the 4 wheel drive selector switch works sometimes and sometimes doesnt

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Check the wiring and connections to the abs system and fluid level in brake master prior to having truck scanned --have truck scanned for trouble code most auto stores such as auto zone / advanced auto do it for free check ur local area the code will give u a start point as to solving ur problem

Posted on Feb 20, 2010

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I had same problem ...i changed frt brks washed underbody service 4wd and then dissconnected - batt wait 5 min then road trip no more problems
.gm glitch computer doesnt sence original perameters so it send trouble codes

Posted on Feb 20, 2010

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1 Answer

4 wheel drive doesnt work 4 wheel selector lights do not come on 1999 chevy Silverado 1500


Can't be to sure with yours. It maybe the switch. On my 2002, I found I had a Transfer Case Control Module issue. Shopped around and found one on Amazon for half the price the local box stores wanted. I would Google this before starting to buy a bunch of parts.

Apr 08, 2017 | 1999 Chevrolet Silverado 1500

1 Answer

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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1 Answer

89 bronco ii won't go into 4x4 or low range


ON LEVEL GROUND
With the transmission selector in "park", start the motor.
With your foot on the brake pedal (steady-constant pressure), move the transmission selector gear to neutral- then turn the 4 X 4 selector knob to 4-wheel drive high. Wait for the 4 X 4 engagement.
Once it is in 4-wheel drive high, with the transmission selector still in neutral, quickly pump the brake peddle twice, keeping you foot on the brake pedal on the second pump, turn the 4 X 4 selector knob from high range to low range. The transfer case should then change from 4-wheel drive high to low.
Electronics being what they are, you sometimes have to repeat the process. You may even have to inch forward or backward.
[I have an '01 Excursion and an '05 F250 with 4 X 4 on the fly...I miss my '97 F250 with the manual 4 X 4 shift on-the-floor!]
Anyway, check the fuse panel for any blown fuses.
Double check to make sure that the problem is not just blown 4 X 4 lights on the instrument cluster. With the nob turned to 4-wheel drive, have a second person- a spotter, check to see if the drive shaft to the transfer case is moving. If it isn't, you have to delve into the troubleshooting process.
Check the solenoids, vacuum hoses, vacuum actuator, and transmission range sensor on the transfer case. .

Nov 27, 2013 | 1989 Ford Bronco II

1 Answer

06 f150 4x4 the 4wheel drive will not go into 4 low but will go into 4high


You need to have your foot on the brake, put the Trans in Neutral, and then shift the Selector to 4 Wheel low. If this does not work you need to check the wire at the transmission for Voltage changes. Each position on the selector has a Resistor and they use 1 Servo to make the gear changes. You need to see if the Selector has different Voltages in each position. If it does, then the Servo is not responding.

But do not forget the Interlock of the brake pedal for the gears to change. Also check for light at the Selector switch. If the lightbulb is burned out you will sometimes throw off resistance and wind up missing functions.

Feb 17, 2011 | Ford F-150 Cars & Trucks

1 Answer

Four-wheel drive not working. No light on swtich. New transfer case motor. Checked the fuses and the four-wheel drive switch. What can it be?


Was the transfer case fluid changed every 50K miles? This very important on these trucks. The Transfer Case Control Module (TCCM) could be at fault, especially since you have no lights on the selector switch. Is the Service 4x4 light on? When you switch from 2H to any of the 4 wheel drive selections, do you hear any actuator noises coming from under the truck?

Dec 07, 2010 | 2003 Chevrolet TrailBlazer

1 Answer

My 2500hd s 4 wheel drive service warning is


The  actuator on the front diff or transfer case is stuck or bad. This will send a signal back and turn on the service light. In 2003 I believe the actuator is on the front differential.  

Oct 24, 2009 | 2003 GMC Sierra 1500

1 Answer

4 Wheel Service light


Do you have the push button selector switches or the handle on the floor?

Aug 20, 2009 | 1986 Chevrolet K1500

1 Answer

2000 v10 250 wont come out of 4wheel drive seems to be stuck in 4w hi grabbs on sharp turns inside selector works


push button 4-wheel drive??? If so maybe the transfer case motor? look on back of transfer case for something that looks like a window motor.... have a friend, while on level surface in nuetral with brake depressed, try pushing 2-wheel button while you lightly tap on side of window motor with light weight hammer or wrench. If this doesnt work then motor may be bad.

Apr 08, 2009 | 1987 Ford F 250

2 Answers

2001 Dodge Durango 4 wheel Drive doesnt work


i had same problem for almost 6 weeks . I just replaced my batty and it fixed the problem compleatly

Dec 10, 2008 | 2001 Dodge Durango

1 Answer

4 wheel drive does'nt work on my 1999 jimmy


change the selector switch first it is by far the cheapest

Dec 07, 2008 | 1999 GMC Jimmy

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