2004 Pontiac Montana - problems with my speedometer, gas and temperature gauges ... sometimes they work, sometimes they don't work. This has been going on for months. Fuses were checked and are fine. I am told that repair (or replace?) is a big job and will be costly. What IS the problem, and what needs to be done? THANKS!!

Unfortunately, GM really screwed up the 2003-2006 instrument panels and there have been thousands of problems but not recalls so far. You might want to consider a complete rebuild of your instrument cluster. There are multiple on-line places that you can send your instrument panel into and they will completely rebuild your instrument cluster and replace the dashboard lighting also. Most of them charge in the $200.00 range for this service.

http://gmgaugerepair.com/vehicles/ is just one of the many rebuild services available

General instructions on how to remove your instrument panel - http://circuitboardmedics.com/files/instructional/instrumentclusters/general.pdf

Cluster instruments all over the place. Is there a recall