20 Most Recent 2003 GMC Yukon XL Questions & Answers


I have a GMC Yukon XL 2003 and I need to know what this part is. Can you help me
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2003 GMC Yukon... | Answered on Jun 03, 2019


Does fuel pump run ? Remove fuel cap. Have someone crank it for you,you should hear fuel pump running. If not bang on bottom of tank while cranking. If it starts fuel pump will need replacing , if not check for power to pump, if it has power,replace pump. If no power, check relay for operation

2003 GMC Yukon... | Answered on Mar 01, 2019


I suggest you get one of those manuals people get nowadays to do it yourself.. My brother used it to repair my car and
it's totally repaired now. he got it from. www.reliable-store.com

2003 GMC Yukon... | Answered on Mar 07, 2018


chances are your brake pads are in need of replacement(auto wear indicators)

2003 GMC Yukon... | Answered on Feb 16, 2018


2003 gmc
If you're finding it difficult to service/repair your car, get one of those online manuals.
You'll not have to wait for others to answer, or rely on mechanics and all. Plus i know a website that sells very cheap but very very good manuals online, without expiry i.e. for lifetime.

2003 GMC Yukon... | Answered on Feb 01, 2018


It sounds like you have a bad connection on the battery. Make sure to clean the connections, make sure they are tight, and make sure the ground cable has a good connection at both ends, battery side and body/frame side. The bad connection is the only answer when the battery is fully charged and you turn the key and it all goes out. If you can turn on your headlights and press the brake at the same time, and they work, then it may be something else, but I would be amazed if they do work given your description of your problem.

So, make sure the battery is charged and clean and tighten all your connections. Test battery connection by putting it under a load with all the lights, head, and brake at the same time. If it goes off then, redo cables again.

Good luck.

2003 GMC Yukon... | Answered on Jan 08, 2018


2 wheel drive or 4 X 4 ? Automatic or manual climate control
Do you know what DTC'S - diagnostic trouble code's are ?
DTC B1375
The ignition 3 voltage circuit is a discrete input to the HVAC control module. The HVAC control modules uses the input to determine that the ignition switch is in the RUN position. When the ignition switch is in the RUN position, ignition voltage is applied to the input.
Rather then guessing as to what the problem , not being able to diagnose properly , your best bet mite be to have a qualified repair shop check it out . Would need to hook up a professional or factory scan tool to check code's ,see if the climate control module will communicate with the tool .
HVAC Control Module
The HVAC control module is a class 2 device that interfaces between the operator and the HVAC system to maintain air temperature and distribution settings. The battery positive voltage circuit provides power that the control module uses for keep alive memory (KAM). If the battery positive voltage circuit loses power, all HVAC DTCs and settings will be erased from KAM. The body control module (BCM), which is the vehicle mode master, provides a device on signal.

2003 GMC Yukon... | Answered on Jan 03, 2018


Look for a chaffed wire in the hinge area of the driver's door. That's the most likely place to find a short or break

2003 GMC Yukon... | Answered on Dec 27, 2017


What's your question ? Tailgate ajar light lit on the instrument cluster ?
The Body Control Module (BCM) monitors the lift glass and the cargo door ajar switches. When the switch closes, the path to ground is completed, and the BCM sends a class 2 message to the instrument cluster to display the CARGO DOOR AJAR message.There are two ajar switches for the rear door ,a left an a right ,the third switch is for the lift glass ajar switch . All three of these switches splice pack SP410 At ground point G410

(Shouldn't have any readings when door(s) and/or window closed.) It's the opposite . switches are open with door closed , G410
In the Body Harness, Behind the RR quarter trim panel near the D-Pillar
It turns out it has nothing to do with rear door. Something about drivers door actuator. NO IT DOESN"T !!!!

2003 GMC Yukon... | Answered on Nov 09, 2017


Check all fuses in your power box. Sounds like could be electrical short. Check connections and grounds to alternator and starter and battery. Also check coils, plugs etc.

Once resolved, try a can of SeaFoam from Canadian tire $12.00..put half in a full tank of gas and the other half in your oil. Do this when the engine is warm, not hot. Let it sit for 30 minutes then take it for a 10 minute drive and see the difference. Save hundreds in injector flushing. This should alleviate the hard starts.cheers.

2003 GMC Yukon... | Answered on Nov 01, 2017


Probably all related , all these systems are interrelated .One won't work without the other. Could have a problem with the TAC system - electronic throttle control . Your best bet , take it an have the computers checked for DTC'S - diagnostic trouble codes . Do you know anything about automotive electronic's ,serial data communication networks ?

2003 GMC Yukon... | Answered on Sep 16, 2017

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