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  1. #1

    Default 99 GMC Sonoma SLS - Window Seal Leaks, is this common?

    Picked up a nice little worker here. 2.2L , 5spd, AC, SLS (plus cab).

    Noticed my stuff (blanket, books, etc.) in back was all wet the other day after a strong rain. All else is dry. Dried my stuff out and looked around. Rug is pretty soaked, but no apparent leaks or at least I could not find any?

    Could it be those rear side windows? The seals? Nothing real evident , except the seat pocket (PS) is wet below the seat which was retracted.

    The rear quarters were rotted out (est. 4" square) when I got it. Had to clean them out, then pop rivetted some aluminum to cover up.

    Are these trucks "leakers" around those back windows? Perhaps leaking down betwen the body and interior trim? Thanks!


  2. #2


    I have a 2001 s10, and have never had any leaking from the rear window seals HOWEVER when door hinge pins got really worn my drivers side door started to sag and caused leaking between the main door seal and the third door.
    2004 Chevy Colorado 2wd/4l60e/3.5 Inline 5
    6-PIAA 520 series yellow ion spot lights 85 watts each
    PIAA quattro fog lights w/extreme white/yellow ion bulbs
    Anzo projector headlights/LED turn signals
    LED underbodys 7-color/LED interior lighting
    JET stage 2 performance chip/Magnaflow exhaust S/S
    Recon Big Rig Lights/LED tail lights/3rd brake light
    Putco LED bed lights/BEDRUG
    Goodmark 2" rise Cowl hood/K&N fipk intake
    98-04' Blazer overhead console & floor console
    40/60/40 seat modified to 40/console/40
    33" Cooper Discovery A/T
    16" Pro Comp extreme alloy wheels

  3. #3


    I can't answer your question but wanted to welcome you to GMTC!

  4. #4

    mfleetwood's Avatar
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    Jul 2010
    Denver, CO
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    ****Thread Moved Here*****

    Mike (Denver, CO) - 2008 Sierra 1500 Z71 SLE 5.3L 4WD

    SUSPENSION: Rancho 4" Suspension Lift; Rancho RS9000XL Shocks; Rancho Skid Plates; Rancho MyRide Wireless Shock Controller;
    BFG All Terrain KO 315/70/17
    DRIVE TRAIN: 4.56 Gears; Detroit TrueTrac Differential; True Cool 40k Transmission Cooler
    PERFORMANCE: DiableSport Predator Tuner; Custom Tuned by Diablew; Magnaflow Exhaust; AFE Cold Air Intake
    ELECTRONICS: Kenwood DNX6180 Touchscreen; Subthump box w/10" Kicker; Driver Information Center (DIC); Rear View Camera
    ACCESSORIES: Westin Brush/Grill Gaurd; Westin Nerf Bars; Truxedo Tonneau; 20% Tint; Tow Mirrors w/Heat & Signals

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