In this video I have a look at a customers 2005 GMC Envoy that has no low beams. Ends up not being anything to fancy but I at least show you that following a good analytical thought process and plan wins every time!
-Enjoy!

99 thoughts on “Gmc envoy: no low beam headlights”
  1. Avataaar/Circle Created with python_avatars Daniel Woodhouse says:

    Im an apprentice motorcycle mechanic and I learn so much from your electrical diagnostics. Thank you

  2. Avataaar/Circle Created with python_avatars Sideslip says:

    Relay good work there.

  3. Avataaar/Circle Created with python_avatars Kirsten Spencer says:

    Back in 1973 had a blue Volvo wagon with no brake lights ( 2 ) so i thought it was the brake light switch on the brake pedal arm. Well a 45 minutes later I decided to check the bulbs and sure enough bad bulbs. Still embarrassed.

  4. Avataaar/Circle Created with python_avatars D says:

    Your not going to get sponsored by Napa by calling them Crapa 😂😂

  5. Avataaar/Circle Created with python_avatars shay stern says:

    top notch troubleshooting

  6. Avataaar/Circle Created with python_avatars Jay Stevens says:

    AR6100? Assault relay capable of shooting 6100 magazines from a single clip

  7. Avataaar/Circle Created with python_avatars Russ Kingsley says:

    I thought u where going to put a link to the headlight restoration in the comments

  8. Avataaar/Circle Created with python_avatars Paul Dormont says:

    Can't find the link to the headlight clearcoating process.

  9. Avataaar/Circle Created with python_avatars Nicholas Andre says:

    It’s never the relay and never the “brain box”…except when it is 😂

  10. Avataaar/Circle Created with python_avatars Nate Tallman says:

    Shocker made an entrance 🤣

  11. Avataaar/Circle Created with python_avatars OnTheEdgeInEauClaire says:

    Had the same problem with a 2008 Pontiac and went with an aftermarket relay. 6 months later, same thing. Keep your receipt handy for warranty.

  12. Avataaar/Circle Created with python_avatars GothRocker7 says:

    Eric Great video, Love how you used common sense to narrow it down to the relay. Eric What do you think of those GMC Envoy's?? a friend was looking at one as a winter beater, I know they did that weird driveshaft through the oil pan of the inline six, which is weird, but I think they are a decent vehicle, is that a fair statement?? I told my friend get a Toyota, 4 runner, but they are a lot more money used, the Envoy is cheaper. Let me know if the Envoy's are really bad. Thanks, Rich p.s. Love the videos

  13. Avataaar/Circle Created with python_avatars GeneSun says:

    I know I'm an old codger, but what was wrong with a plain old headlight switch and dimmer switch? In my 45+ plus years of doing this work, I can count on one hand the number of each I've replaced!

  14. Avataaar/Circle Created with python_avatars Brian Hooker says:

    Great video! The 08 style buick la crosse and impala's had the same problem with that relay. There was actually a recall on them.

  15. Avataaar/Circle Created with python_avatars Jon Miner says:

    Hi, Mr. O. Good detective work, again, as usual, as expected. Sometimes the fingerprints match up and the guilty party confesses. Relays that don't relay get relayed to the trash bin. Anyway, thanks for sharing! Stay healthy!

  16. Avataaar/Circle Created with python_avatars Cesar Ridenis says:

    Bro i love watching your videos it is because of you that got into me hanic and study and read books and watch videos everyday only to be hopefully one day like you 🙏🏻🙏🏻🙏🏻 god bless you my friend

  17. Avataaar/Circle Created with python_avatars Alex Jennings says:

    Just wait till the salt eats the ground on the frame under the driver door causing the abs module to freak out.

  18. Avataaar/Circle Created with python_avatars Flight Forensics says:

    mesmerizing

  19. Avataaar/Circle Created with python_avatars Ryan H says:

    The Humdrum, the mundane, the everyday and I'm still here watching till the end. Thanks for the video and I'll see you next time!

  20. Avataaar/Circle Created with python_avatars ChillCosmos says:

    Same happened with my 03. I fixed the problem by taking a whole bunch of relays from the local yard

  21. Avataaar/Circle Created with python_avatars Garth Mounce says:

    Hi Mr. O. The relay in question is solid state. The low beams double as DRL's on these rigs via a PWM signal from the BCM requiring the solid state relay. Same for the electronic fan clutch, being fed a PWM signal.

  22. Avataaar/Circle Created with python_avatars Busted Knuckle says:

    HEY…. what about the test drive… not done until the test drive

  23. Avataaar/Circle Created with python_avatars Mailman Joe says:

    As soon as I saw the title I knew it was that stupid HDM relay. Those stupid things seem to go bad all the time for whatever reason. Lol

  24. Avataaar/Circle Created with python_avatars Efrem Williams says:

    Mr. O, videos like this are my favorite. You show the masses how to properly diagnose a failure. Regardless of the level of the repair, if you have a solid plan, along with decent skills, there is almost no repair that even a novice can't do. Hence, your tag line at the end of every video is very fitting for this video .

  25. Avataaar/Circle Created with python_avatars G. Fortin says:

    Great logical troubleshoot vid Eric ! Does NOT suck. It's a great refresher on test-lights and reminder to look for a diagram always.

  26. Avataaar/Circle Created with python_avatars Alan Torrance says:

    Your powers of deduction leave little undone. Nicely worked out.

  27. Avataaar/Circle Created with python_avatars Huntnfishnuts says:

    Sometimes it’s nice to get just a bad relay, as long as it’s not a blown fuse that then works once you change the fuse. Now that’s just aggravating.

  28. Avataaar/Circle Created with python_avatars Ruben M. says:

    Please do another another what’s up Wednesday’s 👍

  29. Avataaar/Circle Created with python_avatars Alan Torrance says:

    The High Beam being the lower filament, and the Low Beam the higher filament. Well, that is a natural thing about optics, and how the light is guided by the reflector. All single reflector units will act in that fashion. Have you not come across this fact before, that you had to ask? I am surprised.

  30. Avataaar/Circle Created with python_avatars twwtb says:

    I had both low beams burn out at almost the same time once. The other thing that can happen is one goes out and they don't notice until the second goes. Then the mechanic thinks it's an unlikely coincidence like both went at the same time. D'oh! This is what happens when you comment before watching to the end. Really nice editing with the screen shots of the diagrams, BTW.

  31. Avataaar/Circle Created with python_avatars Fluffy Donkey says:

    So weird, i had the same exact issue last week!!! Did same steps and got to the relay and swapped them and boom worked

  32. Avataaar/Circle Created with python_avatars Charles Miller says:

    Both my car and truck have actual glass headlight bulbs, no yellowing 🙂

  33. Avataaar/Circle Created with python_avatars Mike Bonk says:

    It’s that damn relay, same year mine would just quite on the highway at night….relays seem to be the culprit or corrosion…

  34. Avataaar/Circle Created with python_avatars tren van says:

    other reason to check if the bulb is bad… when they go bad they often do at the same time. assuming you change them at the same time. EVERYTIME I change mine I am using the sylvania "hot" bulbs.. one will fail the other will within minutes.

  35. Avataaar/Circle Created with python_avatars Daniel Johnson says:

    Love the Show. !!! Love the way you Think. A True Master Automotive Technician, with a vast assortment of Tools and Technics to get the job done & get it right. " Well most of the Time". Hee hee, snicker snicker. We can't be perfect all the time, but we try. I'm just an admirer. From Dan Johnson aka Super Genius.

  36. Avataaar/Circle Created with python_avatars watajob says:

    The high beam, the low beam… and the Jim Beam! 😁

  37. Avataaar/Circle Created with python_avatars Xombi Xombi says:

    Logical deduction is kool. Beats buying an ECM BCM and a hi beam low beam switch. And still having no light. How many of us now look back in horror at all the parts and money thrown at problems to no avail. It was still broke. Thanks.

  38. Avataaar/Circle Created with python_avatars John Williamson says:

    I've come across this year's ago on an 03 envoy, and it also ended up being a 40 dollar relay. Got an 07 envoy now and it has been a joy to own. Tough truck.

  39. Avataaar/Circle Created with python_avatars bill8by5 says:

    Another hunt-'em-down and give 'em a headshot. Nice Eric! Often, people don't take the time necessary to thoroughly investigate the problem to derive a viable solution based on observed facts – they black-box it, or as you so aptly put it "Load up the parts cannon". Run out and buy new bulbs, connectors, a big box of fuses, four or five relays (none of which are the correct ones) and of course, the problem remains the problem. I sincerely appreciate the way you methodically go step-by-step in a logical manner to achieve the light bulb coming on (yes, pun intended). When I was in the Navy, I taught my young sailors the very same technique – and those who remained in Engineering Fields prospered greatly from that. Something you failed to mention in this video, but I'm sure you have at some point, is those wiring diagrams are provided unpowered, or dead. One has to view them in that light to mechanize them as they troubleshoot. For instance, the relay is not picked up, but it's easy to see what is supposed to happen if you know what you are viewing.

  40. Avataaar/Circle Created with python_avatars Andrew G says:

    Definitely NOT a bad vidya! Nice to see you after a 12 hour day plus 2.5 hrs commuting! Keep up the good work!

  41. Avataaar/Circle Created with python_avatars Didja3 says:

    IATN

  42. Avataaar/Circle Created with python_avatars marathoner43 says:

    As one who isn't a mechanic, but learns something every time I watch one of your videos, I'll say this video doesn't suck. Might help someone like me down the road some time.

  43. Avataaar/Circle Created with python_avatars Bob Miller says:

    Makes me want to take a hose to that engine bay!!!

  44. Avataaar/Circle Created with python_avatars Anthony Lee says:

    THAT THE CRAPA😂😂😂