Getting into 2002 avalanche. the key will only go in about 1/4 of the way and will not open the door and the remote button will not open the doors either. How can I get in without busting window?

SOURCE: 2003 Jetta TDI - Door locks open fuel door

Look for a short in the wiring harness in the door. The wires from the door lead to the convenience module (controls the doors and windows and some other settings including remote fob) that is under the dash. It sounds like some wires are crossed. VWs are also notorious for having problems with window regulators. They make the windows go up and down and are in the doors. Something might have happen to that and it cause a short. VW just extended the warranty on the window regulators to seven years because of these problems so you should be able to take it to a dealer and not get charged (this is in the U.S. at least, don't know about the rest of the world). The extended warrranty was not limited to original owners but you might want to ask the service people about it first.

SOURCE: 2002 Escape

Probably a issue with your actuator... there is a recall due to the "latching system does not meet the inertia load requirement" might want to check with the dealership to see if your vehicle is with this group, hope this helps :)

Recall 04V602000: Liftgate Latch Release Rod Replacement

Certain 2004-2005 sport utility vehicles and certain 2001-2003 sport utiity vehicles having rear liftgate components serviced with 2004 equivalent components fail to comply with the requirements of Federal Motor Vehicle Safety Standard No. 206, "Door Locks and Door Retention Components." The rear liftgate latching system does not meet the inertia load requirement in one direction.

SOURCE: I cannot open the doors

This is a common fault on the series 3 usually down to the General Module 5 or GMV relays breaking down. Item is situated behind glove box reasonably easy to replace. Cost from BMW about £240.00 Can be found through breakers about £60.00. Keys will have to be recoded. See www.bmwgm5.com for more info.
bmmonks

SOURCE: power sliding door will not open automatically when closed

sounds like the child safty lock is on you can find it by looking in your book for your car

SOURCE: Automatic door locks will not work.

you need to take it to the dealer and have them check the bcm for codes.... also have them check to be sure you have the latest software in the bcm.. its possible that you just need a software update... there are several TSB's covering the concern you have..... it can be a very simple fix with software or even a stuck lock switch may need to be replaced... without the proper diagnostic codes being read from the bcm all that can be done is guessing..and that can be expensive...