Chevy Avalanche Fan Club 2nd Cad Nav in the Av

It's MS Word, not Word Perfect - that's a different product.
I'll try to check if open office will save that as a PDF. Possibly it will but I need to see if it will maintain the lines as formatted.

A very small shaft screwdriver will extract the pins. See the images in my post here:
http://64.91.234.154/cafcna/index.php/topic,37477.50.html

Look at reply # 5, (and others before & after..) same method.

The harness would be from an EXT, but you would have to disassemble a lot of interior parts to R&R it. The wiring changes at the amp are not that difficult, once you have the reference chart. Carry it to someone that has MS word and a printer; you need it that printout.

If you're a bit apprehensive, you're not the only one. Just read what info you can and print out the images you see (they do expand out for a clean print). and find someone that can print that doc. If I shrink it for a screen capture, it doesn't turn out well, so a PDF may work.
Microsoft may still have WordView as a free download, that may work too.

The VSS wire is easy. My first time was.
3 Head unit screws and four cluster screws (7MM head, torque them back @ 18 in pounds.) Not likely you have it already.

Unless they banjo-stringed the connections at the rear of your HU, it should not be a problem. If that adapter is a PAC GM12 accessory aux input device, you will need to change it's power connector wire to either battery + or the BCM's RAP source. You can cut the wire at "E" of C2 and tap it if you wish for the VSS wire, since it goes nowhere else in your truck. The adapter provides the connection so it will work with the Lux vehicles or the 05's (they have it in the harness to the connector). run the other end over to the cluster A4. Tap that wire for the VSS.

If you don't have the adapter's power moved from the connection on the HU, it may be distorted during RAP (depending where it was connected). There is another connection on the HU that will work but it's best to connect it to the RAP source.

The reason is that the UC6 (6-disk HU) in the premium sound system, supplied an AMP "Turn-On" for the dumb amp. The Luxury system doesn't power up the amp with that method. It uses the Class II data bus to do that.. The PAC adapter is usually connected to that amp turn-on, so you see why it won't work. I chased my tail for a while to correct mine because of this change,

The adapter draws only 9 milliamps, so it would take a while to run a battery down, but you can connect it to a constant (fused) batt + source also.

Confused? take your time and read things over. Then revisit this reply with doc's printed out. You don't have to be a master electronics expert to do this, and you'll love the result. (Plus you'll know how to help the next guy..)

HTH!