Howling noise in reared 2004 Buick rendezvous

SOURCE: 2004 Buick Rendezvous AWD Light Stays On

Our 2002 did the same thing. Easy cheap fix! Pull the wheel off and check the wiring that goes to the wheel sensor. You will find after removing a few inches of wrap, a broken wire or two. This could be on either wheel, so check both. Fix the wires back up and you are good to go. Hope this helps!

SOURCE: program a garage door opener in 2004 buick rendezvous

I cannot find the 2004, but you can buy it from the dealer. You can download the 2003 and 2005 from this link. http://www.extendedgmwarranty.com/owners-manual/buick_owner_manuals.html

SOURCE: How do I reset my oil light on my 2004 Buick

Turn the ignition to ON without starting the engine. Fully press and release the accelerator pedal three time in five seconds. If the CHANGE OIL SOON’ indicator flashes two times, the system is resetting. Turn the key to OFF, then start the vehicle. If the CHANGE OIL SOON indicator comes on and stays on for five seconds, repeat the procedure.

SOURCE: 2004 Buick Rendezvous, speedometer fluctuations

Turns out this is a common problem for the Rendezvous.
I took it to a mechanic and after he tested to see if all the speed sensors were working with his handheld computer reader, (because there is no speedometer cable anymore) He reset the needle by turning the key about 25 times as far as possible without starting the vehicle. The speedometer needle came back a bit each key turn till it reached zero. It's been working fine since.

SOURCE: 2006 Buick Rendezvous cxl broken rear hatch strap!

I believe there is a recall for that feature. but i am not 100% sure. it was recalled on 2004 rendezvous