Question about GMC Sierra 3500

1 Answer

I have an 03 GMC 3500 dually that the driver's side fender running lights won't light up. The passenger side work fine. Also my reverse light doesn't light up either. Could that be the problem?

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has answered 1,000 questions.

  • GMC Master
  • 2,598 Answers

Check battery voltage both sides of stop light switch if if none check fuse , if one side only replace switch, if ok check voltage at light bulb holder if ok check bulb or earth system

Posted on May 03, 2017


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

How to fine the signal lights flasher on a 2000 GMC 3500 van


2000 GMC Truck Savana 3/4 ton Van 4.3L FI OHV 6cyl

The Flasheris located: Front seating area, driver side, under dash, below steering column, mounted in relay block

Aug 12, 2017 | GMC Cars & Trucks

1 Answer

I have an 03 GMC 3500 dually that the driver's side fender running lights won't light up. The passenger side work fine. Also my reverse light doesn't light up either.

Are the bulbs good ? Did you check for B+ voltage at the lamp sockets ? The passenger and the driver side get B+ voltage from the same place . Do you know how to do automotive electrical circuit testing with a DVOM - digital volt ohm meter ? Do you know what a wiring diagram is ? How to use it to find testing points in a electrical circuit ? Here is a web site for free wiring diagrams . Enter vehicle info. year , make , model and engine size . Under system click on lighting , then under subsystem click on exterior lighting . Click the search button , then on the blue link's . The light's on the fenders are maker lamps ! Now here is were it gets tricky , if you look at the diagram on the right you will see the back up lamps are controlled by the BCM - body control module . The BCM gets a turn on signal from the PCM -engine computer , because the transmission range switch is a input to the PCM . This can be very confusing to someone you doesn't deal with this sort of thing . Hooking up a scan tool that can view this type data would be the easiest way to trouble shoot .

ECM Inputs and Outputs Diagnosis

Electric Testing Techniques You Need to Know

May 02, 2017 | GMC Sierra 3500 Cars & Trucks

1 Answer

1984 GMC G3500 has multiple lighting issues... Headlamp high beams work, low beams do not ( brand new bulbs and interior switch ) Passenger reverse lamp inop... Driver side rear blinker/brake light stuck...

seems you have several different problems. High beam working and no low beams=dimmer switch is bad. Reverse lamp not working=bulb socket bad,wiring broke,bad ground at back
Brake light on drivers side stuck on=brake light switch

Nov 18, 2017 | GMC Jimmy Cars & Trucks

1 Answer

Gmc sierra dually 01 - cab clearance lights aren't

Check the fuse but it is possible that a bulb can be out

May 18, 2013 | Cars & Trucks

1 Answer

2005 GMC Savana. Rail lights don't work properly.

Check any ground wire you can find. They may have gotten corroded and no longer grounding properly.

also I would check both fuse boxes and make sure there aren't any blown fuses.

May 10, 2013 | Cars & Trucks

1 Answer

2004 GMC Envoy driver's side heated seat quit

I have the same problem except the back of mine works but the bottom doesn't. Passenger side is fine. Let me know what you find out if you could.

Aug 26, 2011 | 2004 GMC Envoy

1 Answer

To replace the rear fender on my 2005 Dually, how

they bolt on through the bed which is a hard one to change for most

Feb 05, 2010 | 2005 Dodge Ram 3500

1 Answer

Fuel pump problem

Check the ground. Sometimes it will work its way loose, not allowing it to start. If ok, check your fuel pump relay in the fuse panel under the hood on drivers side fender well.

Apr 10, 2009 | 1998 GMC Sierra

1 Answer

Running lights

Remove 3 - 4 screws on fender cover close to side marker light. Pull fender cover out a bit for you to use your other hand to reach side marker light. By twisting on one direction and here you go the light out. Replace new bulb and replace everything on reverse order.

Dec 30, 2008 | 2001 Lexus RX 300

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

32 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts


Level 3 Expert

77939 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides