2003 Chevrolet Trailblazer cooling system problems

24 complaints about cooling system have been filed for the 2003 Chevrolet Trailblazer, which is 2% of all its NHTSA complaints.

Complaints: 24 2% of this year's complaints
Typical mileage: 52,000 miles 17 complaints with mileage
Crashes and fires: 0 and 0
Injuries and deaths: 0 and 0

Source: NHTSA owner complaints

When cooling system problems show up

Based on 17 complaints that include mileage. 59% were reported before 60,000 miles. The amber marker shows the median: half of these complaints happened before that mileage.

View the numbers

Mileage	Complaints
0k to 20k miles	1
20k to 40k miles	1
40k to 60k miles	8
60k to 80k miles	5
80k to 100k miles	1
100k to 120k miles	0
120k to 140k miles	0
140k to 160k miles	1
160k to 180k miles	0
180k to 200k miles	0
200k+ miles	0

What the data shows

Of the 17 cooling system complaints that report mileage, the median is about 52,000 miles, and 59% were reported before 60,000 miles.

None of the cooling system complaints mention a crash, fire, injury or death.

What owners wrote

I have had several repairs done to my new vehicle. I have had the 2003 trailblazer for 7 months and it has been in the shop 7 times-2 times for the coolant system-1 time for my master cylinder-3 times for my circuit boards-now for my steering and my starter( I believe my truck is in the shop as I am typing this letter) I have been trying to work with the dealership and GM but no one is trying to replace my truck with something that is not in the shop every month. Thanks.

April 2003

Fan clutch failure on my 2003 chevy trailblazer car "roars" as the fan does not disengage and experience loss of acceleration.

Reported at 43,508 miles, December 2005

Cooling system problems in other years

2026
2025
2024
2023
2022
2021
2009
2008
2007
2006
2005
2004
2003
2002
2001
2000

Cooling system problems across all Chevrolet models