Quick and easy fix.
Gmc envoy sun roof leaks.
The sunroof was always kept closed so this leaking puzzled me.
Open your sunroof and look for the drain holes in both front corners.
Mk1 clios also leak from the arial remove and reseal.
When closing it the rear portion is sunken in an cause it to leak.
I bought a 2005 gmc yukon denali with a sunroof.
Those tubes run through the door pillars and drain through to the rocker panels.
You might poke the wire right through the tubing or disconnect it from the drain hole.
Water mysteriously leaked intermittently at various points in the headliner near and through the driver side air vents in the headliner behind driver at left front a pillar and from the center console above the rear view mirror.
My 2006 gmc envoy sunroof will slide back albeit with a pop noise.
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The sunroof needs to be taken out cleaned damming seal on frame removed and fitted back with silicone sealer excess sealer clean of with white sprite no need to remove head lineing if fitted with 10 mm bolts use a ratchet spanner.