On my 2007 Chevy Avalanche l have a major problem with my Stabilitrak turning off then back on just about every few minutes. This is causing my trans to shife very hard and my fuel mileage to be cut down to about 7 mpg. l have had ot to the dealer 3 times already but they cannot find the exact problem.that needs to correct this to get the truck back to where it belongs.

Contact the customer assistance division, number is in back of ur owner is manual. Tell them about ur problem & the inability of ur local dealer to repair the problem. Ask them for assistance in getting the matter resolved. They should contact the dealer & send a field representative out to assist you. l am assuming that the vehicle is still under warranty, if the problem was noted prior to the warranty expiring then they should still help. Make sure u have documentation addressing the same issue previously. Keep ur records, u may have some consumer rights through the ''Lemon Law'' if they cannot resolve the issue.