1991 Suburban has water leak on drivers side floor when it rains.

Water is probably coming from behind the dashboard. It will be from the windshield or the firewall that water is getting in.

Possibly from the windshield. Is there any rust around the windshield area? Check for debris in water drain outlets under the wiper arm cowling.

find the ac cabinet and there will be a drain hose out to under the car
they block up at the cabinet opening causing your problem

Was it engine coolant? If so your heater core may be leaking.

Only a technician can drain your A/C. Is the water that is accumulating sweet smelling? A heater core can leak radiator fluid on the floor of your vehicle if it goes bad.(hense the sweet smell) Your A/C shouldn't drip anything inside your car.

Just fixed the same issue on our 2004 Suburban. Turned out it was just that the drain for the rear A/C was clogged with dirt (located right behind right rear tire -- above the exhaust pipe). All it took was a paperclip, straightened out, poking gently in this narrow rubber ****... and the water came gushing out (floor was wet at the time). If you do it when the floor is dry, you would have to turn on the rear A/C for a while and make sure the condensate drips out of the drain.

We had same--water on driver side rear floor (soaked!). Driver side front floor seemed dry until feeling UNDER rug, was slightly damp. We found the location of TWO leaks causing this.

Leak #1 was through the parking brake line/cable seal; Recaulked with silicone. Removed plastic trim on floor between floor and door to reveal metal channel filled with water.

Leak #2 was where the door meets the car, near the hinge. It was the accordian-looking tube housing the wiring for the door. The big, rubber, circular plug connecting it to the main part of the car had come loose and water ran down through that, into the SAME metal channel filled with water from leak #1; will seal with silicone.

Note: We found that the channel filled extensively near the front door, BUT the carpet edge from the floor near the rear seat was dipping into it, wicking it up to the rear floor. Also, upon acceleration, the water in the channel gushed toward the back, thus soaking the rear carpet.

These leaks were found by removing all plastic trim (covering edges of carpet by doors), then one of us pouring water into specific areas of the exterior of the vehicle, and the other one watching closely with a flashlight for any signs of dripping.

if you have a sunroof in this you drain tubes are probably plugged. you would need to remove the headliner to check.

take a star screw driver and punch a pair of holes in your floor on drivers side make sure once you go through push the screw driver towards the front of the car and creat angled pockets
these will be your new drains being so small they will bnot tako on water or they will take on a min of water and they will drain the floors


it''s the easiest way to fix the problem go right through the carpet it's just thet easy use a good pointy screw driver or a center punch but dont make the hole larger then 1/4 inch
a mechanic will carge you 250 to fix original drains and will likely do the same as i said a couple of wacks near the lower center on the floor boards
so get in place feet on floor slide them back against the seat with it all the way back now place pointy object between feet and wach it with a hammer
once through push pointy objest forward to create new drain

you may have a leaking a/c vent ducting or worn weather striping on door