One problem related to automatic transmission control module has been reported for the 2003 Chevrolet Tahoe. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Chevrolet Tahoe based on all problems reported for the 2003 Tahoe.
On 12/27/06 I purchased my chevy Tahoe 2003 I had complete 4x4 service on 12/14/06 as recommended by the dealer as required maintenance for 90,000 miles and to maintain the warranty. On 12/29/07 the vehicle was taken in for service for the 4wd service light on and noise when engaged in 4wd. Diagnosis: transfer case control module. The dealer will not repair vehicle nor will easy care gold warranty cover repair. I was assured that the vehicle was in excellent shape for at least 2 years.