I have a 2008 the rear hatch back trunk door will not open with the remote? I have brought it to several mechanics and they have NO clue how to fix this. I can open if I get inside and open manually

SOURCE: hatch-back door will not open

I can say I have had the same problem, only the back doors and the rear hatch/glass won't open using keyless remote from them freezing this Winter.  The front two driver/passenger doors will unlock with keyless remote but none of the rear doors, hatch or glass.  Since I had to replace the stoplight bulbs in the rear with one not working and I don't need a ticket on Memorial Day weekend (need to replace 2 at the same time is wise according to any good mechanic), I had to get the rear hatch open to get to the lamp assembly and replace the bulbs.  My thinking was that since my two front locks were opening but no others and my keyless remotes are working, it has to be a fuse or relay that is not working!  So, I talked with a NAPA rep and he said the "Day running lights" relay can be a temporary fix to get the rear locks open to replace the bulbs.  I looked up in the owners manual where both relay's are located and removed the "Locked" relay and "Day running lights" relay and put the "Day running lights" into the same slot where the "Locked" relay was not operating and it worked!  I got the doors unlocked and replaced my stoplight bubs replaced.  Now, I have a new problem, my Tahoe won't start!!  I'm assuming the relay wasn't supposed to stay in the wrong slot when operating the vehicle because I started the truck, and it started and died-started and died-same and again.  I think the wrong fuse can be used to fix another problem like a fuse.  But, a fuse you can leave in and deal with one operation in the vehicle not working until you can replace the fuse later when you purchase it.  But, not a relay!  Now, I think the confused electronics cause another component (possibly the fuel pump relay) to burn out with the wrong relay in place of another when the vehicle operates.  I should have known but I was so glad to get the doors open after two months and it being Memorial Day weekend.  Now I have to find out what else is wrong so don't make that mistake to avoid the same predicament.  Better to get the relay ordered and replaced than to have this happen to you. 

SOURCE: Back hatch will not unlock/open

you could use some lithium grease and spray it in the general area of the latch and hope it lubes the latch enough to loosen it to open. but it will cause a mess spraying it

SOURCE: my key wont unlock the trunk anymore but the remote opener does.

There is a cable that runs from the key cylinder to the latch mechanism. There are clips that hold the cable housing in place, and if one of those comes loose then turning the key just moves the housing without releasing the latch. Check the clip closest to the latch. To get the trunk open drop the back seat, crawl in, and pull on the cable.

It is also possible that the cable is broken or damaged and needs to be replaced -- I assume you will then need to replace the enrite assembly.

SOURCE: rear hatch 2005 chevy tahoe is locked & won't open

my 06 tahoe just got this problem...all other doors lock and unlock with the fab and door switch...but the hatch is in permanent locked mode. i cant even unlock the hatch window. why is this happening?

SOURCE: 2005 chevrolet equinox with rear

ive got a 07 equinox and the rear hatch wont open as of yesterday. on the inside of the hatch there is an access plug you can pop off and inside you'll see a metal switch with a hole in it. if you push it away from yourself, it will unlatch it. i dont know why the hatch wont open as ive checked the fuse and its ok.