The Chevy Suburban is a large SUV that has had technical service bulletins (TSB) and reports from consumers about the 4X4 switch failing or the 4x4 not engaging when the switch is flipped. Complaints and TSBs range from electrical problems with the switch to major transmission problems.
The 2006 Suburban has a TSB published by the manufacturer concerning the electronic transfer case of the 4X4 Chevrolet not shifting into gear. According to the TSB, the transfer case prevents the Suburban from being shifted into four-wheel drive or is only partially shifting into gear, but can not complete the shifting into four-wheel drive. The Suburban can still be operated in two-wheel drive, but the electronic transfer case will eventually affect the two-wheel drive operation also. The electronic transfer case must be replaced in order to correct this Suburban 4X4 switch problem.
Several complaints have been reported about the Suburban 4X4 position sensor and selector switch failing. The failure of the sensor and switch prevents the operator from engaging the 4X4 on the Suburban. A TSB is also published on this 4X4 switch problem concerning the 4WD warning light illuminating once the sensor and switch fails. The Suburban can not be shifted into 4X4 position. The position sensor and selector switch need to be replaced in the Suburban in order to fix the problem.
A TSB on the 1997 Suburban discusses a 4X4 switch problem attributed to a broken or cracked transmission case. The broken or cracked transmission case leaks transmission fluid and prevent the lever linkage from working properly. The lever linkage can not be engaged and switched into the 4X4 position. The only correction for this switch problem on the Suburban is to have the transmission case replaced by the dealership or qualified technician.
