WILL THE REAR SEATS FOLD COMPLETELY DOWN IN A 2005 GMC ENVOY

May be you can go in from the back trunk and locate the cables that release the seat .

Some fixya user told me a website reliable-store it is very good.. I used it to repair my shredder it had some spark issue which wasn't easily fixed. you can go there and try

No, you'll have to remove them

The 2005 Mazda Verisa Hatchback does have fold down rear seats.They fold down in 2 sections.

you have to pull the part you sit on up and forward (to front of truck) then the backs will just fold down sams as trail blazer

there should be a hole close to license plate that fits a tool that comes with the envoy check owners manual or behind rear seats

As for the knobs, if you can pull them right off the unit just go to a scrap yard and pull some off a lower mileage vehicle, doesnt need to be the same exact one alot of gms will share the same parts. or try a site like this https://www.autozone.com/collision-body-parts-and-hardware/radio-knob/gmc/yukon-xl-1500

There may be a stuck relay Stuck in the "On" position. A relay is a remote switch that does the heavier work of a smaller or more delicate switch. It is probably under the seat but if you have "memory" seats that move the power seats back and forth it is probably the control box causing the problem. It has relays inside it.

The tools are under the second row seats. The hole for the spare tire lowering mech. is above the rear bumper when you lift the tail gate. Put the proper tool down the hole, turn counter clockwise, lowers spare. Reverse to bring up.

There should be a loop between the seat and backrest, pull that and the seat will pull toward the front seats. After that, pull the lever located at the outside of the backrest. This lever is on the outside of the seat by the door-side of the seat. Pull that up and allow the backrest will fold down and the headrest will pivot back and your seat is folded down.