Complaints
721
Crashes
58
Fires
2
Injuries
36
Fatalities
1
Recalls
0
Worst 1999 GMC Sierra Problems
Top 3 most-reported issues with average mileage at failure.
#1197 complaints
Service Brakes, Hydraulic:Antilock/Traction Control/Electronic Limited Slip
Avg mileage:63,978 mi
Crash-related:27
#233 complaints
Service Brakes, Hydraulic:Antilock/Traction Control/Electronic Limited Slip:Control Unit/Module
Avg mileage:52,440 mi
#329 complaints
Hydraulic Brakes
Avg mileage:69,778 mi
Crash-related:1
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All Problems by Category
Every NHTSA complaint category for the 1999 GMC Sierra.
| Component | Complaints | Crashes | Fires | Avg Mileage | Volume |
|---|---|---|---|---|---|
| Service Brakes, Hydraulic:Antilock/Traction Control/Electronic Limited Slip | 197 | 27 | — | 63,978 mi | |
| Service Brakes, Hydraulic:Antilock/Traction Control/Electronic Limited Slip:Control Unit/Module | 33 | — | — | 52,440 mi | |
| Hydraulic Brakes | 29 | 1 | — | 69,778 mi | |
| Brakes | 25 | 2 | — | 125,220 mi | |
| Structure:Body:Tailgate:Hinge And Attachments | 21 | — | — | 83,576 mi | |
| Seat-Related Issues | 20 | — | — | 75,287 mi | |
| Tire Defects | 20 | 2 | — | 40,133 mi | |
| Vehicle Speed Control:Accelerator Pedal | 20 | 1 | — | 22,125 mi | |
| Automatic Transmission | 19 | 2 | — | 55,250 mi | |
| Service Brakes, Air:Antilock:Control Unit/Module | 16 | — | — | 55,578 mi | |
| Unintended Acceleration | 16 | — | — | 98,500 mi | |
| Suspension:Front | 14 | — | — | — | |
| Suspension Failures | 13 | — | — | 162,198 mi | |
| Tires:Tread/Belt | 11 | — | — | — | |
| Air Bags:Frontal | 10 | 10 | — | 46,000 mi | |
| Gasoline Fuel System | 8 | — | — | 74,834 mi | |
| Service Brakes, Hydraulic:Foundation Components:Disc:Rotor | 8 | — | — | 32,000 mi | |
| Parking-Brake Issues | 7 | — | — | 97,500 mi | |
| Seat Belts:Front:Retractor | 7 | 2 | — | 9,000 mi | |
| Service Brakes, Air:Antilock | 7 | 2 | — | 70,583 mi | |
| Exterior Lighting:Headlights | 6 | — | — | — | |
| Seat Belts:Front:Anchorage | 6 | 1 | — | — | |
| Service Brakes, Hydraulic:Foundation Components:Hoses, Lines/Piping, And Fittings | 6 | 1 | — | 119,469 mi | |
| Visibility:Power Window Devices And Controls | 6 | — | — | 72,775 mi | |
| Engine And Engine Cooling:Engine:Gasoline | 5 | — | — | — | |
| Service Brakes, Hydraulic:Foundation Components | 5 | 1 | — | — | |
| Engine & Cooling | 4 | — | — | — | |
| Engine And Engine Cooling:Engine | 4 | — | — | — | |
| Fuel Pump | 4 | — | — | — |
Service Brakes, Hydraulic:Antilock/Traction Control/Electronic Limited Slip
197
complaints
Crashes
27
Fires
—
Avg Miles
63,978
Service Brakes, Hydraulic:Antilock/Traction Control/Electronic Limited Slip:Control Unit/Module
33
complaints
Crashes
—
Fires
—
Avg Miles
52,440
Hydraulic Brakes
29
complaints
Crashes
1
Fires
—
Avg Miles
69,778
Brakes
25
complaints
Crashes
2
Fires
—
Avg Miles
125,220
Structure:Body:Tailgate:Hinge And Attachments
21
complaints
Crashes
—
Fires
—
Avg Miles
83,576
Seat-Related Issues
20
complaints
Crashes
—
Fires
—
Avg Miles
75,287
Tire Defects
20
complaints
Crashes
2
Fires
—
Avg Miles
40,133
Vehicle Speed Control:Accelerator Pedal
20
complaints
Crashes
1
Fires
—
Avg Miles
22,125
Automatic Transmission
19
complaints
Crashes
2
Fires
—
Avg Miles
55,250
Service Brakes, Air:Antilock:Control Unit/Module
16
complaints
Crashes
—
Fires
—
Avg Miles
55,578
Unintended Acceleration
16
complaints
Crashes
—
Fires
—
Avg Miles
98,500
Suspension:Front
14
complaints
Crashes
—
Fires
—
Avg Miles
—
Suspension Failures
13
complaints
Crashes
—
Fires
—
Avg Miles
162,198
Tires:Tread/Belt
11
complaints
Crashes
—
Fires
—
Avg Miles
—
Air Bags:Frontal
10
complaints
Crashes
10
Fires
—
Avg Miles
46,000
Gasoline Fuel System
8
complaints
Crashes
—
Fires
—
Avg Miles
74,834
Service Brakes, Hydraulic:Foundation Components:Disc:Rotor
8
complaints
Crashes
—
Fires
—
Avg Miles
32,000
Parking-Brake Issues
7
complaints
Crashes
—
Fires
—
Avg Miles
97,500
Seat Belts:Front:Retractor
7
complaints
Crashes
2
Fires
—
Avg Miles
9,000
Service Brakes, Air:Antilock
7
complaints
Crashes
2
Fires
—
Avg Miles
70,583
Exterior Lighting:Headlights
6
complaints
Crashes
—
Fires
—
Avg Miles
—
Seat Belts:Front:Anchorage
6
complaints
Crashes
1
Fires
—
Avg Miles
—
Service Brakes, Hydraulic:Foundation Components:Hoses, Lines/Piping, And Fittings
6
complaints
Crashes
1
Fires
—
Avg Miles
119,469
Visibility:Power Window Devices And Controls
6
complaints
Crashes
—
Fires
—
Avg Miles
72,775
Engine And Engine Cooling:Engine:Gasoline
5
complaints
Crashes
—
Fires
—
Avg Miles
—
Service Brakes, Hydraulic:Foundation Components
5
complaints
Crashes
1
Fires
—
Avg Miles
—
Engine & Cooling
4
complaints
Crashes
—
Fires
—
Avg Miles
—
Engine And Engine Cooling:Engine
4
complaints
Crashes
—
Fires
—
Avg Miles
—
Fuel Pump
4
complaints
Crashes
—
Fires
—
Avg Miles
—
Search Owner Complaints
Read what owners actually reported to NHTSA for the 1999 GMC Sierra. Type a keyword (e.g. “transmission”, “stalling”, “brakes”) to filter.
Other GMC Sierra Years
1999 GMC Sierra — FAQ
Answers based on real NHTSA complaint and recall data for this specific model year.
Is the 1999 GMC Sierra reliable?
Verdict: Severe Issues. The 1999 GMC Sierra has 721 NHTSA complaints, 58 crash-related, and 0 recall campaigns. The most common issue is Service Brakes, Hydraulic:Antilock/Traction Control/Electronic Limited Slip with 197 complaints. Source: NHTSA via VinItel.
What are common problems with the 1999 GMC Sierra?
Top reported problems: Service Brakes, Hydraulic:Antilock/Traction Control/Electronic Limited Slip (197 complaints, avg 63,978 mi); Service Brakes, Hydraulic:Antilock/Traction Control/Electronic Limited Slip:Control Unit/Module (33 complaints, avg 52,440 mi); Hydraulic Brakes (29 complaints, avg 69,778 mi). Every complaint is filed by an owner with NHTSA — this is raw reported data, not editorial opinion.
At what mileage do problems start on the 1999 GMC Sierra?
The weighted average mileage at time of complaint is about 68,290 miles. Some components fail earlier, some later — check the "All Problems by Category" table above for per-issue averages.
How safe is the 1999 GMC Sierra?
NHTSA complaints for the 1999 GMC Sierra include 58 crash-related reports, 2 fire reports, 36 injuries, and 1 fatalities. These are owner-reported incidents, not official crash-test ratings — a complaint being filed doesn't confirm a defect, but clusters around specific components are worth investigating.
Does the 1999 GMC Sierra have any recalls?
No NHTSA recall campaigns have been issued for the 1999 GMC Sierra as of the latest data sync. Verify by VIN for the most current status — new recalls can be issued years after a model year ships.
Should I buy a 1999 GMC Sierra?
Proceed with extreme caution. The 1999 GMC Sierra shows significantly more complaints than average for its class. If you're buying one, a pre-purchase inspection and a VIN history check are essential — skip them and you're gambling.
Source: NHTSA (National Highway Traffic Safety Administration) complaint and recall databases, aggregated by VinItel.
Wider context: See the full GMC Sierra reliability report with year-by-year comparison and generation analysis.
Check Your Specific 1999 GMC Sierra
Real owner complaints tell you about the model. The VIN tells you about your specific car — accidents, title issues, odometer fraud.
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