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  1. east302

    '99 4x4 Tahoe LT lower control arm

    Is it confirmed that the UCA knockouts are still intact? Having the knockouts in place allowed the factory to install the arms within spec without the need for an alignment. If adjustment was needed down the road, the tabs could be punched out to elongate the bolt hole. It should already...
  2. east302

    What did you do to your OBS GMT400 Tahoe/Yukon Today?

    GM doesn’t show it as a part with the mirror, so it may be something that comes with the windshield to help the glue stick better.
  3. east302

    What did you do to your OBS GMT400 Tahoe/Yukon Today?

    Here’s the wiring diagram, maybe it’ll help…
  4. east302

    Horizontal vs Vertical Distributor

    Yeah, just take the screw out of the hose
  5. east302

    1999 Chevy Tahoe

    What does the connector that plugs into the blower switch at the control panel look like? Jiggle it around and see if the blower responds. Some years had an intermediate connector on the power line maybe 1-ft from where it connects on the blower. Those can melt as well.
  6. east302

    Torsion Bars

    Yep, R on passenger side. Pictures were taken from the front.
  7. east302

    Torsion Bars

    Not sure if it helps, but here is my 98 (2-door). The GM manual doesn’t mention clocking them, just putting them on the correct side.
  8. east302

    99 Tahoe 5.7 vortex P0300 code HELP

    It’s just a rubber hose from the solenoid to the valve (#14 in diagram) so it can crack over time. The only way it could cause a vacuum leak is if the solenoid is energized - when the a/c temp dial is in the Max detent. #20 is the hard line to the PCV fitting.
  9. east302

    1999 GMC YUKON SLT heater control and temp problem

    The floor-defrost is controlled by the actuator near the gas pedal. There’s a notched silver dial on it. Watch that dial as the panel is switched from defrost to floor to dash. The notch should roughly align with some marks on the actuator and rotate from about 11 to 1 o’clock. Compare the...
  10. east302

    99 Tahoe 5.7 vortex P0300 code HELP

    They can seep oil over time, wouldn’t hurt to swap them if they’re original. They’re the same part for both valve covers. As others mentioned, aftermarket distributor caps are a weak point. Follow the hard vacuum line from the PCV fitting over to the solenoid on the passenger firewall...
  11. east302

    Broken drivers seat arm rest?

    Here’s a video that may help. When you reinstall, put the clip (#3) on first and then push the armrest on.
  12. east302

    Help trying to figure out chirping noise

    This may be something to look at… https://www.gmtruckclub.com/threads/2005-yukon-random-chirping-sounds-under-dash-solved.1443788/
  13. east302

    1999 Chevy Tahoe Dash Wiring Harness Ground wires

    Mine is a 98 and I’m scratching my head trying to remember a second ground on the driver side. The only one I remember is on the dash support bar behind the floor light - it has a yellow wrapped lead which makes it look like an airbag circuit. It may have changed for 99. The 99 manual can be...
  14. east302

    1998 Tahoe 5.7 crank no start - SOLVED

    That should deadhead the pump so that it didn’t increase does point to either a weak pump, excessive pressure drop (clogged filter) or a leak that the pump cannot overcome. Did you block the supply as well? If it leaks down with the return open, it’s either going through an injector, the...
  15. east302

    1993 2 door Blazer

    Dang, you’ve been busy! Are you going to do the Denali conversion on the exterior? I see you have that crack on the dash that most of these get. It’s caused by the metal clip on the bezel that goes into that slot on the dash. The slot isn’t enclosed on the left side, so the clip pushes the...
  16. east302

    1996 Tahoe 2 dr. Dash Rear Wiper and Hatch switch lights not working?

    Glad you got it sorted out. The air dampers have rubber seals along the perimeter which tend to rot away and let air flow by - particularly to the floor when the dash vents are selected. Once you pull the dash, they’re easy enough to replace and the GM parts are still available. It helped...
  17. east302

    1996 Tahoe 2 dr. Dash Rear Wiper and Hatch switch lights not working?

    Here are the wiring diagrams for a 96. Do you get no voltage on the gray using both the harness ground and a chassis ground? The radio lights share the same circuit, so if they work that should narrow it down somewhat. Voltage should drop to zero as the headlight dimmer switch is turned down...
  18. east302

    HVAC Core

    Check Rockauto for an evaporator core. The 99 GM service manual can be downloaded here, go to post #111: https://www.gmt400.com/threads/88-98-service-manuals.43575/page-12#post-1366872 You’ll need to pull the dash to get to the core. Here is how I did mine, maybe it’ll help...
  19. east302

    99 Tahoe underhood wire connector? - SOLVED

    That looks like it goes to the pressure switch on the back of the compressor.
  20. east302

    Lower ball joint size - SOLVED

    I’d agree, they look like stamped/welded which is what my 98 had. Moog K6477 fit in it.
  21. east302

    Lower ball joint size - SOLVED

    Here are some pictures of the two types of control arms… https://www.tahoeyukonforum.com/threads/forged-or-welded-lower-ball-joints.126042/
  22. east302

    94 Blazer K1500 (key in ignition, lights on buzzer not working)

  23. east302

    94 Blazer K1500 (key in ignition, lights on buzzer not working)

    Here are the pages from the 94 manual, maybe they’ll help. If the seatbelt alarm also doesn’t work, I’d be looking for a power issue or maybe loose ground (by the data link connector under the dash).
  24. east302

    What did you do to your OBS GMT400 Tahoe/Yukon Today?

    It’s 15960325
  25. east302

    Windshield washer hose diagram?

    Here is the info from the manual and part diagrams. The windshield hose is through a grommet in the firewall, the rear hose is along the driver frame. It’s these two guys…

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