One problem related to battery cable has been reported for the 2004 Chevrolet Suburban. The most recently reported issues are listed below.
Engine intermittently goes into "reduced engine power" "traction control disabled" for no apparent reason. Engine power is reduced by two thirds. Issue has been occurring for approximately 2 years now. Gm/chevy dealership has been unable to resolve the issue. I've had the car in the shop over 20 times some times on a weekly basis. Throttle body, tac, battery cables, and other components have been changed to no avail. Several close calls on the freeway with 18 wheelers bearing down on rear end when issue has occurred. I no longer allow my wife and kids in the car. I'm sure someone will eventually die as a result of this issue and maybe then gm will address the issue. Hopefully when it happens it will not involve small children which is what Suburbans are typically purchased for. . . To drive around families with small children. Consumers thinking they are purchasing a good size vehicle that will keep their family safe should steer away from gm products.