Most common 2005 GMC Topkick problems
Share of the 1 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
GMC Topkick complaints by model year
Best Topkick years: 2003, 2006. Compare all years →
2005 GMC Topkick recalls (3)
Steering
On certain medium duty trucks equipped with zf model 8018 steering gears, the steering gear May have been produced incorrectly. A steering gear with this condition May produce the feeling of hitting a curb and a cracking or pinging sound when the steering wheel is turned.
Remedy: Dealers will inspect for certain date codes and verify the mileage on steering gears and replace gears as necessary. The recall began on October 25, 2007.
Service brakes, hydraulic › Fluid
Certain 2003-2005 model year 4500/5500 series Chevrolet kodiak, school bus chassis, and GMC topkick vehicles; and 2003-2004 model year GMC school bus chassis vehicles equipped with an 8.1l engine and hydromax brake system. The power steering hose May come into contact with a portion of the intermediate steering shaft.
Remedy: GM will notify its customers and dealers will reroute the power steering hose. If the steel braiding of the hose is exposed, dealers are to replace the hose free of charge. The recall began on July 12, 2005.
Service brakes, hydraulic
Certain trucks, sport utility vehicles, and vans equipped with Bosch hydro-boost brake assemblies, the hydraulic brake booster pressure accumulator May crack and separate from the hydro-boost assembly during normal operating conditions.
Remedy: Dealers will test the hydro-boost assembly for functional operation of the two-function valve. If the hydro-boost assembly fails the test, dealers will replace the assembly free of charge.
Frequently asked questions
Is the 2005 GMC Topkick a good car?
Based on 1 owner complaint filed with NHTSA, the 2005 Topkick rates few complaints: about as many complaints as a typical year of the Topkick at the same age. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2005 GMC Topkick?
The air bags — 1 complaint, 100% of all complaints for this model year.
How many recalls does the 2005 GMC Topkick have?
There are 3 recalls for the 2005 GMC Topkick, the most recent from October 4, 2007 (steering). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the GMC Topkick?
The best years by complaints, compared at the same age, are 2003 and 2006. See the full GMC Topkick years comparison.
At what mileage do 2005 GMC Topkick problems happen?
The median mileage reported in complaints is about 18,000 miles; 100% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.