GMC Topkick owners have reported a total of 12 problems for their cars built in the 5 model years listed in the chart below. The chart shows the number of problems reported across all service years for each given model year of the GMC Topkick. The 2004 GMC Topkick cars have the most problems reported (5 problems).
The following chart shows the 8 most common problems for GMC Topkick cars. The number one most common problem is related to the vehicle's steering (4 problems). The second most common problem is related to the vehicle's electrical system (2 problems).