Trying to reprrogam my key less entry 2001 chevy tahoe all the steps work but then remote still dosent

SOURCE: Reprograming a keyless remote

program transmitter code(s) as follows:
1) Confirm that all the doors are closed and the ignition key is out of the ignition cylinder.
2) Open the driver’s door. Insert the key and turn the ignition switch to ON position within 10 seconds.
3) Turn the ignition switch to OFF position within 10 seconds, remove ignition key from lock cylin-der.
4) Push and release the driver’s door switch (1) 3 times within 20 seconds.
5) Insert the ignition key and turn the ignition switch to ON position within 10 seconds.
6) Turn the ignition switch to OFF position within 10 seconds, remove ignition key from lock cylin-der.
7) Press and hold both LOCK and UNLOCK buttons (2) on the transmitter (3) for more than 5 seconds
within 20 seconds of removing the ignition key from the lock cylinder in step 6.
8) Press LOCK or UNLOCK button (2) on the transmitter (3) within 5 seconds (after step 7). All the
doors will lock/ unlock to confirm that this process has been properly done.
With this process, the transmitter has been programmed.
9) If you want to program an additional transmitter, repeat the procedure from Step 1) through Step 8).
10) Make sure that the keyless entry system properly operates by operating each transmitter.

SOURCE: 2001 chevy venture lost key

You must get a new key from the dealer. Bring in the registration, and photo I.D. Then they will cut you a key. After that, try this procedure....

1. With a master passkey III key (Black), turn ON the ignition, with the engine OFF.
2. Observe the Security telltale, after approximately 10 minutes the telltale will turn off.
3. Turn OFF the ignition, and wait 5 seconds.
4. Repeat steps 1-3 two more times for a total of 3 cycles or 30 minutes.
5. With a master passkey III key, start the vehicle. The vehicle has now learned the key transponder information and the PCM has now learned the fuel continue password.
6. If it does not work, you will need to get it to the dealer.

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: 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: 2006 Tahoe Rear Hatch lock actuator

A wrecking yard is your best bet. The odds of you getting one that is bad are astronomical. Are you sure your remote has fresh battery's? Also check your fuse going to that devise before buying another one. The second choice on where to find one is eBay. Of course they are usually higher then a wrecking yard. They get a lot of there parts for sale by going to the salvage yard them selves. I hope this helps and Good Luck, The Raz