Total Complaints
5 filings
GMC L SERIES · model year
2003 GMC L SERIES
5 NHTSA complaints for this specific cohort.
NHTSA overall rating
Not crash-tested
New Car Assessment Program
The 2003GMCL SERIES carries 5 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 0 crashes, 0 fires, 0 injuries, and 0 fatalities. No NCAP 5-star crash-test rating is available for this model year in the federal database.
Component-level analysis is where model-year complaints become actionable: the top complaint category for the 2003 L SERIES is vehicle speed control with 1 filings, followed by exterior lighting:hazard flashing warning lights:switch (1) and exterior lighting:turn signal (1). Concentration in one or two component groups is the classic signature of a systemic defect; a flat distribution usually reflects normal aging, warranty complaints, or isolated build-plant variability.
NHTSA currently has 2 investigation files overlapping the 2003 L SERIES. Owners comparing this cohort against neighboring years should pair the counters above with the complaint-by-year trend on the parent model page — a spike in a single year often tracks to a platform refresh, a new transmission supplier, or an updated ECU calibration. Use the related-complaint feed below to read raw owner narratives before deciding whether any pattern here affects your specific use case.
5
Complaints
0
Crashes
0
Fires
0
Injuries
0
Deaths
Crashes Reported
0 reports
Source
NHTSA ODI
Federal complaints database
Complaints vs. fleet median (215)
At or below the fleet median complaint volume.
Complaints by Component
| Component | Count |
|---|---|
| VEHICLE SPEED CONTROL | 1 |
| EXTERIOR LIGHTING:HAZARD FLASHING WARNING LIGHTS:SWITCH | 1 |
| EXTERIOR LIGHTING:TURN SIGNAL | 1 |
| ENGINE AND ENGINE COOLING | 1 |
| VISIBILITY | 1 |
Recent Complaints
20081218ENGINE AND ENGINE COOLING
AUGUST 2008 - FAN CLUTCH FAILURE, $800 DEALERSHIP CHARGE TO FIX OCTOBER 2008 - BLOWER MOTOR FAILURE, NO HEAT OR AIR ON SPEEDS 1, 2 & 4, ONLY ON SETTINGS 3 & 5, NOT SURE IF IT IS BLOWER MOTOR OR SWITCH. *TR
20081218VISIBILITY
AUGUST 2008 - FAN CLUTCH FAILURE, $800 DEALERSHIP CHARGE TO FIX OCTOBER 2008 - BLOWER MOTOR FAILURE, NO HEAT OR AIR ON SPEEDS 1, 2 & 4, ONLY ON SETTINGS 3 & 5, NOT SURE IF IT IS BLOWER MOTOR OR SWITCH. *TR
20071231VEHICLE SPEED CONTROL
HAZARD LIGHTING SYSTEM, BLINKERS, CRUISE CONTROL ALL WORKED "GREAT" UP UNTIL I RECEIVED A RECALL NOTICE TO BRING MY VEHICLE IN FOR REPLACEMENT PART. I DID AS INSTRUCTED AND THE PART REPLACED, EVER SINCE THEN THEY SHORTED OUT WHEN USING MY BLINKERS OR CRUISE. WHEN MY BLINKER WAS GOING AND JUST STOPPED..I HAVE TO PUSH THE HAZARD BUTTON IN AND OUT AND THEY START WORKING AGAIN. I SEVERAL TIMES TOOK CAR BACK AND DEALERSHIP COULD NOT GET IT TO MALFUNCTION, UNTIL FINALLY THEY TOLD ME TIME HAD EXPIRED FOR FIXING, EVEN THOUGH I HAVE HISTORY OF REPEATEDLY BRINGING IN VEHICLE. THERE WAS NOTHING WRONG WITH MY PERFECT CAR UNTIL, I TOOK CAR TO DEALERSHIP. *TR
20071231EXTERIOR LIGHTING:HAZARD FLASHING WARNING LIGHTS:SWITCH
HAZARD LIGHTING SYSTEM, BLINKERS, CRUISE CONTROL ALL WORKED "GREAT" UP UNTIL I RECEIVED A RECALL NOTICE TO BRING MY VEHICLE IN FOR REPLACEMENT PART. I DID AS INSTRUCTED AND THE PART REPLACED, EVER SINCE THEN THEY SHORTED OUT WHEN USING MY BLINKERS OR CRUISE. WHEN MY BLINKER WAS GOING AND JUST STOPPED..I HAVE TO PUSH THE HAZARD BUTTON IN AND OUT AND THEY START WORKING AGAIN. I SEVERAL TIMES TOOK CAR BACK AND DEALERSHIP COULD NOT GET IT TO MALFUNCTION, UNTIL FINALLY THEY TOLD ME TIME HAD EXPIRED FOR FIXING, EVEN THOUGH I HAVE HISTORY OF REPEATEDLY BRINGING IN VEHICLE. THERE WAS NOTHING WRONG WITH MY PERFECT CAR UNTIL, I TOOK CAR TO DEALERSHIP. *TR
20071231EXTERIOR LIGHTING:TURN SIGNAL
HAZARD LIGHTING SYSTEM, BLINKERS, CRUISE CONTROL ALL WORKED "GREAT" UP UNTIL I RECEIVED A RECALL NOTICE TO BRING MY VEHICLE IN FOR REPLACEMENT PART. I DID AS INSTRUCTED AND THE PART REPLACED, EVER SINCE THEN THEY SHORTED OUT WHEN USING MY BLINKERS OR CRUISE. WHEN MY BLINKER WAS GOING AND JUST STOPPED..I HAVE TO PUSH THE HAZARD BUTTON IN AND OUT AND THEY START WORKING AGAIN. I SEVERAL TIMES TOOK CAR BACK AND DEALERSHIP COULD NOT GET IT TO MALFUNCTION, UNTIL FINALLY THEY TOLD ME TIME HAD EXPIRED FOR FIXING, EVEN THOUGH I HAVE HISTORY OF REPEATEDLY BRINGING IN VEHICLE. THERE WAS NOTHING WRONG WITH MY PERFECT CAR UNTIL, I TOOK CAR TO DEALERSHIP. *TR
Compare 2003GMCL SERIES to Similar Vehicles
NHTSA Investigations
Frequently Asked Questions
How many complaints does the 2003 GMC L SERIES have?▼
The 2003 GMC L SERIES has 5 NHTSA complaints, 0 crashes, 0 fires, 0 injuries, and 0 deaths reported.
What are the most common problems with the 2003 GMC L SERIES?▼
The most-complained component for the 2003 GMC L SERIES is VEHICLE SPEED CONTROL with 1 complaints. Other frequently reported areas include EXTERIOR LIGHTING:HAZARD FLASHING WARNING LIGHTS:SWITCH and EXTERIOR LIGHTING:TURN SIGNAL.
Is the 2003 GMC L SERIES safe to buy?▼
Review the complaint history, crash and fire reports, safety ratings, and recall status on this page to make an informed decision. No NHTSA crash test rating is available for this model year. Compare with other model years using the links above.
Where does this data come from?▼
All complaint, recall, and safety rating data is sourced from the National Highway Traffic Safety Administration (NHTSA). Complaints are filed by vehicle owners through NHTSA's Office of Defects Investigation.
Vehicle Safety Guides
Data as of 2025. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.
Read our methodology — how this data is sourced, computed, and verified.