Canadian Hummer Club Forums

We used a recomended method of clearing blocked front drain tubes ie using weed eater line and blowing out tubes. This works but can cause tubes to detach from sunroof drain Will show on H3 as a wet area above the airbag cover on window a frame . Worse is if tube (hard plastic detaches from its firewall gromet.)on passenger side it causes water to pour into carpet footwell and worse of all the bcm causing numerous error codes and engine shut down. Our first was an ABS failure/ traction notice ending in both engine shutdown and error codes for just about everything . See u tube for a better repair P'S tube runs down inside cabin under air bag covers then foreward to firewall plug gromet (This plug is where the restriction is that causes most blockages)