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Thread: Little help with headlight adjustment

  1. #1
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    Default Little help with headlight adjustment

    Installed new grill & light/marker assembly in the Tahoe yesterday.

    The 2 screws that protrude out the top of the headlight boxes are they the adjustment screws or are they they for something else?

    Gonna take another look at the old ones today & futz around with some more...

    Just thought maybe someone here could shed some light...literally LOL

  2. #2
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    No worries I figured it out...thanks anyways!

  3. #3
    Registered User ak diesel driver's Avatar
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    my adjuster were siezed up when I tried to adjust them the first time. Took a little patience to get them unsiezed and lubed up.
    96 gmc k2500 4" exhaust, marine inj, #9 resistor, GL4, turbomaster, duraterms,-1.94 TDCO,FTB, remote pmd, isspro pillar gauges, lift pump relay added ,141 block, 2 1000 w block heaters, 2 150w glue on oilpan heaters, 2 150w glue on transpan heaters, 97 K47 air filter , IP replaced at 229k ,gear drive set awaiting install, Parts for intercooler waiting to be installed

    94 k1500 excab sb 6.5 plow truck. Fisher plow w/engine driven pump, F intake, h/m turbomaster, plowing chip by Buddy, remote PMD w#9 resistor, Duraterms

    96 k3500 CC 6.5 dually
    94 k2500 excab lb 6.5 parts truck
    00 burb 5.3 wifes
    70 Ford reg cab lb 428 cj richmond 5spd lockers 35s
    75 Vette built 383 needs work
    62 Tempest convertible way on the back burner project
    85 Honda VF1000R
    90 P30 Cummins BT4 work van
    90 Int SA dump w/trailer
    416c backhoe

  4. #4
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    Mine are brand new...and they are easy enough to adjust, after I figured out what knobs to turn LOL

    Thanks AK yea the old ones are all seized up.

    Gonna work on the old ones see if I can free em up, they are going on the neighbors old 91. His are past seized & these ole ones will be an improvement over what he has on there now, he don't drive much at night, thankgod!

  5. #5
    I might be crazy but i ain't dumb chevyCowboy's Avatar
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    so which nobs do what. i to just put new head lights in and cant figure it out. i figured out the up and down adjuster but what i cant seem to get to work is the left and right.
    thanks
    JOSH
    COWBOYCADILLAC II 2000 CCSRW LB 4.10's w/posi, heart transplant Complete! 599 block, Fluidamper, .030 over, head studs, .01 thicker HG, FTB mod, rebuilt 5521, FRB5 lift pump w/ wicks prefilter, 4inch exahust, bullydog EGT & Boost gauges, custum rear tool box bumper, Dmax tow mirrors,
    and lots more. started life as a CCDRW W/ Flatbed

    COWBOYCADILLAC: RIP 93 K2500 6.5TD 4X4 wrecked at 290000 but the heart lives on in the 00

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  6. #6
    Registered User ak diesel driver's Avatar
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    here are the adjusters
    Attached Images Attached Images
    96 gmc k2500 4" exhaust, marine inj, #9 resistor, GL4, turbomaster, duraterms,-1.94 TDCO,FTB, remote pmd, isspro pillar gauges, lift pump relay added ,141 block, 2 1000 w block heaters, 2 150w glue on oilpan heaters, 2 150w glue on transpan heaters, 97 K47 air filter , IP replaced at 229k ,gear drive set awaiting install, Parts for intercooler waiting to be installed

    94 k1500 excab sb 6.5 plow truck. Fisher plow w/engine driven pump, F intake, h/m turbomaster, plowing chip by Buddy, remote PMD w#9 resistor, Duraterms

    96 k3500 CC 6.5 dually
    94 k2500 excab lb 6.5 parts truck
    00 burb 5.3 wifes
    70 Ford reg cab lb 428 cj richmond 5spd lockers 35s
    75 Vette built 383 needs work
    62 Tempest convertible way on the back burner project
    85 Honda VF1000R
    90 P30 Cummins BT4 work van
    90 Int SA dump w/trailer
    416c backhoe

  7. #7
    Tropical 6.5er matuva's Avatar
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    The adjuster far right (outer) is for horizontal position of the beam.

    The other one at bottom is for azimuth
    1994 full size BLAZER
    Buddy's 3 banger chip
    Low stall converter (1200-1400 rpms)
    Completely rebuilt 506 + 2nd gapless rings

    and more ...

  8. #8
    Registered User Big T's Avatar
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    Quote Originally Posted by matuva View Post
    The adjuster far right (outer) is for horizontal position of the beam.

    The other one at bottom is for azimuth
    How about explaining it in "UP/Down" and "Right/Left" adjustments?

    The adjustments on the projector headlights I purchased are not working. I've got them set to acceptable positions, but there really is no movement when I use the adjusters.
    1999 Chevy Suburban K2500 4x4 w/ 6.5TD 190K miles. 4L80E and 3.73 rear gears. HD lift pump, ATT, Heath HO injectors, 4" Diamond Eye Turbo Back exhaust, Warpspeed x-over, deleted soot trap , D-Tech pmd behind bumper, Heath programming for ATT, Pillar mounted gauges: EGT, Boost, Tranny Temp. Replaced IP at 130K. HID light conversion with All-4-On-Hi. Forged Alcoa wheels.

    My son's 1994 GMC Suburban K2500 4x4 w/ 6.5TD 243K miles. 4L80E and 4.10 rear gears. Buddy 4 position tune. Rebuilt Bosch injectors and new Duraterm glows. HO water pump with Dmax fan, HD fan clutch and new AC Delco 195 T-stats. Diamond Eye 3" Downpipe and 4" exhaust, deleted soot trap. Warp speed 2.5" mandrel bent crossover. D-Tech PMD mounted behind the bumper. Pillar mounted gauges: EGT, Boost, Tranny Temp. Rancho 9000 shocks. Rebuilt front end and steering box tightened. Forged Alcoa wheels.

  9. #9
    OBD 1 Master Pruittx2's Avatar
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    Default Hope this helps,,,

    Here is how to adjust them with out paying,, or having an expensive unit to do so.
    Info from an ol' timer that worked a gm back in the day.

    With vehicle on level ground, measure from ground to center of headlamp. then measure the distance between the 2 lamps. Mark this measurement on the wall and back vehicle up 20ft from wall. on level surface. then aim lights to the marks. They WILL be spot on!


    1995 GMC SLT Suburban 153,000 miles
    Buddy Super chip, 4" exhaust, FTB Mod, Bosch Injectors, GU6-G80, Killer PMD Cooler FS PMD #9
    Duraterm Glows, TurboMaster, K-47 airbox, D-max fan New Mod'd clutch






  10. #10
    Registered User ak diesel driver's Avatar
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    perhaps this pic from the bottom will help. Middle adjuster adjusts the light vertically by pushing/pulling on the bottom of the light. The end one adjust the left left or right by pushing/pulling on the end of the light
    Attached Images Attached Images
    96 gmc k2500 4" exhaust, marine inj, #9 resistor, GL4, turbomaster, duraterms,-1.94 TDCO,FTB, remote pmd, isspro pillar gauges, lift pump relay added ,141 block, 2 1000 w block heaters, 2 150w glue on oilpan heaters, 2 150w glue on transpan heaters, 97 K47 air filter , IP replaced at 229k ,gear drive set awaiting install, Parts for intercooler waiting to be installed

    94 k1500 excab sb 6.5 plow truck. Fisher plow w/engine driven pump, F intake, h/m turbomaster, plowing chip by Buddy, remote PMD w#9 resistor, Duraterms

    96 k3500 CC 6.5 dually
    94 k2500 excab lb 6.5 parts truck
    00 burb 5.3 wifes
    70 Ford reg cab lb 428 cj richmond 5spd lockers 35s
    75 Vette built 383 needs work
    62 Tempest convertible way on the back burner project
    85 Honda VF1000R
    90 P30 Cummins BT4 work van
    90 Int SA dump w/trailer
    416c backhoe

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