Looking for some help, experience or suggestions. My tow vehicle is a 2004 Yukon Denali. The Service Ride Control message just came up and the leveling pumps no longer are working. I have an appointment at the dealer on Wednesday, although I rarely take any vehicle to the dealer for service. I'm a pretty good do-it-youself'er and/or I get vehicle work done at good independent service shops. Not sure about this issue, however in that it's pretty specific to this truck.
Anyone else tackle this problem? Any helpful hints or experience on getting it diagnosed or fixed (other than a trip to the dealer and top $$ repair bill)?