Total Complaints
11 filings
GMC C/K SUBURBAN (GMC) · model year
1999 GMC C/K SUBURBAN (GMC)
11 NHTSA complaints for this specific cohort.
NHTSA overall rating
Not crash-tested
New Car Assessment Program
The 1999GMCC/K SUBURBAN (GMC) carries 11 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 1999 C/K SUBURBAN (GMC) is service brakes, hydraulic with 5 filings, followed by fuel system, diesel (1) and service brakes (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 1999 C/K SUBURBAN (GMC). 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.
11
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 |
|---|---|
| SERVICE BRAKES, HYDRAULIC | 5 |
| FUEL SYSTEM, DIESEL | 1 |
| SERVICE BRAKES | 1 |
| FUEL/PROPULSION SYSTEM | 1 |
| ENGINE | 1 |
| ELECTRICAL SYSTEM | 1 |
| FUEL SYSTEM, GASOLINE | 1 |
Recent Complaints
20141215FUEL SYSTEM, GASOLINE
FIRE HAZARD ON MY 99 GMC SUBURBAN K1500 FROM METAL FUEL LINE FAILURE WITH LEAKING FUEL WHEN ENGINE IS RUNNING. THE DANGER IS FROM MORE RUSTED OUT LINES SIMILAR TO THE METAL BRAKE LINE FAILURE I HAD IN THE PAST ON THIS TRUCK AND HAD TO REPLACE THE ENTIRE BRAKE LINE SYSTEM. THE TRUCK WAS ASSEMBLED IN MEXICO WITH INFERIOR OR CHEAP PARTS THAT RUST PREMATURELY. *TR
Mileage: 178,575
20141004FUEL/PROPULSION SYSTEM
ENGINE STOPPED DURING ACCELERATION ONTO HIGHWAY. LOSS OF POWER STEERING AND BRAKING. AS THEY MAKE A RELOCATION KIT FOR THE MODULE, I ASSUME THIS IS A KNOW DEFECT. IN A. CURVE THIS COULD HAVE BEEN CATASTROPHIC. *TR
Mileage: 203,000
20141004ENGINE
ENGINE STOPPED DURING ACCELERATION ONTO HIGHWAY. LOSS OF POWER STEERING AND BRAKING. AS THEY MAKE A RELOCATION KIT FOR THE MODULE, I ASSUME THIS IS A KNOW DEFECT. IN A. CURVE THIS COULD HAVE BEEN CATASTROPHIC. *TR
Mileage: 203,000
20141004ELECTRICAL SYSTEM
ENGINE STOPPED DURING ACCELERATION ONTO HIGHWAY. LOSS OF POWER STEERING AND BRAKING. AS THEY MAKE A RELOCATION KIT FOR THE MODULE, I ASSUME THIS IS A KNOW DEFECT. IN A. CURVE THIS COULD HAVE BEEN CATASTROPHIC. *TR
Mileage: 203,000
20130427SERVICE BRAKES
BRAKE FAILURE- METALLIC BRAKE LINE CORRODED AND RELEASED FLUID UNDER PRESSURE CAUSING BRAKE SYSTEM FAILURE. *TR
Mileage: 85,000
20120206SERVICE BRAKES, HYDRAULIC
BRAKE LINE (BETWEEN FRONT CALIPER AND ABS BLOCK) RUPTURED WHILE DRIVING VEHICLE AT APPROX. 35 MPH. TOTAL SYSTEM FAILURE WITH NO WARNING LIGHTS OR PEDAL SOFTNESS PRIOR TO PEDAL GOING TO THE FLOOR. I DID MANAGE TO STOP THE VEHICLE BY USING THE EMERGENCY BRAKE AND PULLING OFF OF THE ROAD INTO SOFTER SOIL. I NEARLY STRUCK SEVERAL VEHICLES AND HAD TO DRIVE OFF OF THE ROADWAY TO AVOID AN ACCIDENT. THIS VEHICLE IS USED EXTENSIVELY BY MY SON. IF THIS FAILURE HAD OCCURRED WHILE HE WAS DRIVING THE RESULT COULD HAVE BEEN MUCH WORSE. HE HAD JUST RETURNED FROM DRIVING THIS VEHICLE IN THE MOUNTAINS OF NEW HAMPSHIRE ON A SKI TRIP THE PREVIOUS WEEKEND. ALL BRAKE LINES IN VEHICLE SHOW HEAVY CORROSION AND WILL NEED TO BE REPLACED. *TR
Mileage: 150,000
20100407SERVICE BRAKES, HYDRAULIC
MUSHY BRAKES, DEALER SAID THIS WAS NORMAL IN1999, IHEAR THERE MAY REALLY BE A PROBLEM. *TR
20100220FUEL SYSTEM, DIESEL
PUMP MOUNTED DRIVER (PMD) INTERMITTENT TO COMPLETE FAILURE CAUSES DIESEL ENGINE TO STALL UNPREDICTABLY AT ANY SPEED OR RPM. THIS CAUSES A LOSS OF POWER STEERING AND POWER ASSISTED BRAKING. HAVE PURCHASED 3 REPLACEMENT PMD'S SO FAR. *TR
Mileage: 160,000
20100220SERVICE BRAKES, HYDRAULIC
WHEN BRAKING SLOWLY THEN TRYING TO COME TO A FULL STOP, ANTI LOCK BRAKING SYSTEM ENGAGES AND BRAKE PEDAL GOES TO THE FLOOR WITH NO STOPPING POWER. *TR
Mileage: 160,000
20081015SERVICE BRAKES, HYDRAULIC
OVER THE PAST 2-3 MONTHS I HAVE BEEN EXPERIENCING A PROBLEM WITH THE ANTI-LOCK BRAKE SYSTEM ACTIVATING AT LOW SPEED ON DRY PAVEMENT. WHEN THIS FIRST BEGAN TO HAPPEN I WAS NARROWLY ABLE TO AVOID REARENDING THE CAR AHEAD OF ME, IN ONE CASE ONLY BY APPLYING THE PARKING BRAKE. I HAVE A 1999 GMC K1500 SUBURBAN 4 WHEEL DRIVE. I NOW ALLOW EXTRA ROOM FOR BRAKING. A SEARCH OF THE INTERNET SHOWED THAT GM HAD A RECALL FOR THIS PROBLEM ON 1999 T0 2001 MODELS, BUT WHEN I CALED GMC TO ASK WHY I HAD NOT RECEIVED A RECALL LETTER, I WAS TOLD THAT THERE WAS NO OPEN RECALL FOR MY VEHICLE. *TR
Mileage: 66,000
20080814SERVICE BRAKES, HYDRAULIC
ANTI-LOCK BRAKING SYSTEM ACTIVATES AT SLOW SPEEDS CAUSING LOSS OF BRAKING. THERE IS A RECALL ON THIS VEHICLE IN CANADA AND 14 STATES. WISCONSIN IS NOT INCLUDED IN THE RECALL. PROBLEM SEEMS TO BE ROAD SALT CORRODING THE WHEEL SPEED SENSORS. WISCONSIN USES ROAD SALT AND SHOULD BE ADDED TO THE RECALL LIST. *TR
Mileage: 97,300
Compare 1999GMCC/K SUBURBAN (GMC) to Similar Vehicles
NHTSA Investigations
Frequently Asked Questions
How many complaints does the 1999 GMC C/K SUBURBAN (GMC) have?▼
The 1999 GMC C/K SUBURBAN (GMC) has 11 NHTSA complaints, 0 crashes, 0 fires, 0 injuries, and 0 deaths reported.
What are the most common problems with the 1999 GMC C/K SUBURBAN (GMC)?▼
The most-complained component for the 1999 GMC C/K SUBURBAN (GMC) is SERVICE BRAKES, HYDRAULIC with 5 complaints. Other frequently reported areas include FUEL SYSTEM, DIESEL and SERVICE BRAKES.
Is the 1999 GMC C/K SUBURBAN (GMC) 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.