For some reason my battery is being drained. I've already replaced the battery, alternator. I have noticed that the passenger seat warmer has not been working as it did. Sometimes it heats up appropriately and some times it does not. I am going to take it to a gmc service shop but since I know absolutely nothing about electrical malfunctions in a vehicle I would appreciate any insight that might be useful.
Draining battery on 2003 GMC Yukon XL 1500
by Visitor in Kent, WA on April 16, 2010
ANSWER by Visitor , March 23, 2011
had the same thing, the dealer had to change the dash cluster(gauges) at no charge . there was a problem with shaking levels.