GM Truck Club
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 6 of 6
  1. #1

    Default Wattage of back-up light bulb?

    Hi everyone!

    As I wrote in a earlier thread I don't have any back up lights, I'm planning to mount some led work lights above my back door in the plastic conversion top, and there fore I have some questions.

    Can anyone tell how many watts the original light bulb have? I don't want to overload the tiny cables that is back there, or maybe I need to put a relay back there with separate fusing from the battery :-/ (and then use the original power to control the relay).

    Have anyone of you tried to mount anything in the conversion top, it feels quite rigid but I haven't drilled any holes yet... :P

    And last question, I'm going to mount a back up camera at some point and have seen cameras mounted in the center brake light above the doors, I've tried to find it as a aftermarket accessory but haven't had any luck, do you know if it exists?

  2. #2


    Well, with no truck info I have to guess at what you might have for bulbs.

    Most GM trucks are using the 3157 (2 filaments) for all bulb locations, the bright light in this bulb is 27 watts.

    You might have the 3156 (1 filament) which is also 27 watts.

    That is approximately a 2 amp draw.

    '09 Avalanche LTZ - Black
    '05 Envoy XL (sold)

  3. #3


    The back-up lamps don't really provide adequate illumination for backing after dark. Their true purpose is just as an indicator for those dolts who can't figure out why the car in front of them is getting larger and the space between them is diminishing.

    I'd suggest mounting a set of aftermarket fog lamps with a good relay. The relay would serve to bring voltage directly from the battery on larger wires and would only be triggered when the transmission switch is activated. Mind, one might add a second switch for those people who refuse to dim their highway lights.

  4. #4


    Thanks for the answers, I were wondering because I've spotted some really nice 18w led lights with ~1000 lumens, should be nice and bright :D and I'll take the 60degrees flood light, then it should have a really nice spread too

  5. #5


    This is the one, wonder if I should go with one or two tho... I think one should be enough light, but it's going to look better with two :/

  6. #6


    check out the whitenight back up lighting system. if you have a factory installed hitch you can tap into the reverse light wire there. That wire is a much larger diameter than the one in the tail light harness.

    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors,
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts