2003 Chevrolet Trailblazer EXT

No clear pattern

1.5% of complaints about the 2003 Chevrolet Trailblazer EXT arrived in its first year of service. That is an unusual figure for a 2003 vehicle, but with only 405 complaints on record the sample is too small to call it a pattern — the margin of error covers the range where ordinary vehicles sit. The figures below are reported without a verdict. The most-reported system is fuel system (86 complaints), typically at 5.3 yr or about 71,000 miles.

Complaints: 405
Median age at failure: 5.3 yr
Median mileage: 65,471 n=332
Crash / fire / tow: 4.9% of reports
Safety recalls: 3

When each system is reported — middle 50% of complaints

System

0y2y4y6y8y10y12y14y

Fuel system

86 reports · 71,000 mi

5.3 yr

Electrical system

79 reports · 83,450 mi

6.8 yr

7.6%

Power train

53 reports · 60,000 mi

5.0 yr

3.8%

Visibility

27 reports · 50,000 mi

3.7 yr

3.7%

Structure

25 reports · 42,229 mi

4.4 yr

12%

Exterior lighting

25 reports · 48,557 mi

4.7 yr

Engine cooling

16 reports · 78,120 mi

4.9 yr

Suspension

15 reports · 56,000 mi

2.6 yr

Safety recalls — NHTSA campaigns

05V494000 2005-10-27

Latches/locks/linkages:doors:latch

CERTAIN SPORT UTILITY VEHICLES HAVE A REAR SIDE CLOSURE LATCH THAT MAY NOT LATCH OR UNLATCH DUE TO CORROSION CAUSED BY ROAD SPLASH, SUCH AS WATER AND ROAD SALT. THESE VEHICLES WERE ORIGINALLY SOLD IN OR CURRENTLY REGISTERED IN THE FOLLOWING STATES: CONNECTICUT, DELAWARE, ILLINOIS, INDIANA, IOWA, MAINE, MARYLAND, MASSACHUSETTS, MICHIGAN, MINNESOTA, MISSOURI, NEW HAMPSHIRE, NEW JERSEY, NEW YORK, OHIO, PENNSYLVANIA, RHODE ISLAND, VERMONT, WEST VIRGINIA, WISCONSIN, AND THE DISTRICT OF COLUMBIA.

IF THE DOOR IS NOT LATCHED PROPERLY AND IT GOES UNNOTICED, IT MAY OPEN WHILE THE VEHICLE IS IN MOTION. IF AN UNBELTED OCCUPANT FELL OUT OF THE VEHICLE, PERSONAL INJURIES COULD OCCUR.

04V527000 2004-11-01

Exterior lighting:brake lights

ON CERTAIN SPORT UTILITY VEHICLES, VIBRATION AND HEAT MAY CAUSE THE TAIL LAMP/STOP LAMP BULB TO LOOSEN IN ITS SOCKET. IF THIS OCCURS, THE BULB MAY FLICKER AND EVENTUALLY BECOME INOPERATIVE.

AN INOPERATIVE BRAKE LAMP WILL NOT CONVEY THE DRIVER'S INTENTION OF STOPPING TO DRIVERS IN FOLLOWING VEHICLES, AND AN INOPERATIVE REAR TURN SIGNAL LAMP WILL NOT CONVEY THE DRIVER'S INTENTION TO TURN TO DRIVERS IN FOLLOWING VEHICLES. BOTH OF THESE FAILURES CAN INCREASE THE RISK OF A CRASH.

04V046000 2004-02-04

Visibility:windshield wiper/washer

CERTAIN SPORT UTILITY VEHICLES HAVE WINDSHIELD WIPER SYSTEMS THAT WILL NOT TURN ON, CEASE OPERATION WHILE IN USE, FAIL TO TURN OFF/ON BY THEMSELVES (MOISTURE SENSITIVE WIPER SYSTEM), OR HAVE CONTINUOUS WINDSHIELD WASHER PUMP OPERATION BECAUSE THE PRESENCE OF WATER WITHIN THE WIPER MODULES CAN EITHER CAUSE A SHORT CIRCUIT OR CAN LEAD TO THE CORROSION OF COMPONENTS WITHIN THE MODULE.

DEPENDING ON THE OCCURRENCE AND WEATHER SITUATION, DRIVER VISIBILITY COULD BE REDUCED, WHICH COULD RESULT IN A CRASH.

In owners’ own words

Power train 6,000 mi 1.8 yr in service

FRONT END LOOSE, BALL JOINTS NEEDED REPLACEMENT. DRIVER SIDE SEATBELT DEFECTIVE/TWISTED. ROTORS WARPED NEEDED REPALCEMENT. OUTSIDE DOOR HANDLE DOES NOT OPEN DOOR. DIRVER SIDE MIRROR MOVES AROUND (PROGRAMED) WITHOUT NOTICE. TRANSMISSION ENGAGES ROUGH, FEELS LIKE IT SLIPPING. TAILGATE OUT OF ALLIGNMENT, REAR SEATBELT DEFECTIVE NEEDED REPLACEMENT, 4WD LOCKED UP IN PARKING LOT, FRONT END HAS SCRAPING NOISES WHEN TURNING, HEATED SEATS NOT WORKING, IRRATIC, TAILGATE PANEL FALLS OFF, DRIVER SEAT FRAME BROKEN NEEDED REPLACEMENT,ELECTRICAL SYSTEM IRRATIC. *AK

Power train 31,000 mi 2.4 yr in service crash / fire / tow

WHILE PUTTING THE VEHICLE IN 4-WHEEL DRIVE IT BEGAN TO ACCELERATE. VEHICLE RAN INTO A GUARD RAIL AND ROLLED DOWN INTO A DITCH. OWNER CONTACTED THE DEALER, WHO SAID IT WAS THE FAULT OF THE DRIVER. LATER, DEALER CONTACTED THE OWNER, AND INFORMED HIM THAT THE 4-WHEEL DRIVE KEY WAS BROKEN. *AK *BF *NM

Power train 35,000 mi 3.2 yr in service

VEHICLE WHEN PLACED IN FOUR WHEEL DRIVE, DOES NOT ENGAGE FRONT WHEELS AND IN FACT DOES REMAIN IN ONLY TWO-WHEEL DRIVE. THIS CREATES A DANGEROUS SITUATION BECAUSE ON SNOWY ROADS PARTICULARLY IN RURAL AREAS, FOR EXAMPLE, THE VEHICLE CAN BECOME UNSAFE TO DRIVE. *JB

Suspension mileage not reported 1.6 yr in service

MY FRONT BRAKES HAD TO BE REPLACED AFTER 24,000 MILES. I HAVE HAD OTHER SUV AND THIS SEEMS LIKE INFERIOR PRODUCTS ARE BEING USED. THE DEALER HAD TO TURN ROTORS AND ALSO REPLACE A TORSION BAR. I DO NOT DRIVE THIS VEHICLE FOR WORK, I HAVE A COMPANY CAR AND THE BRAKES WERE REPLACED ON IT AT ALMOST 45,000 MILES. *JB

Other Trailblazer EXT model years

How to read this

This is what owners reported, not a reliability rating. People file with NHTSA about alarming failures, not routine ones, and complaint volume tracks how many cars were sold.
Failure ages come from the incident date on each complaint, populated on about 83% of records. Mileage is shown where reported — NHTSA’s 2021 system change cut mileage capture to roughly 15%, so it thins out sharply after MY2020.
Every rank compares this vehicle only against others of the same model year. A 2025 car has not had time to accumulate five-year failures, so comparing early-failure share across years is meaningless.
Fourteen make-months distorted by media storms and mass recalls — Toyota in February 2010 ran 11× normal volume across 33 models — are excluded.
Recalls are manufacturer actions and authoritative; complaints are not. A recall listed here may already have been performed on any individual car. Check a specific VIN at nhtsa.gov/recalls.