GMC

Sierra HD (2nd)

2007-2014 · Heavy-Duty Truck · 12 engines
Best Engine ⚠️ Caution (3.4)
1,106 NHTSA Complaints
0 Recalls
27 Fire Reports
62 Crash Reports
Includes data from: SIERRA 2500SIERRA 2500 CREW CABSIERRA 2500 EXTENDED CABSIERRA 2500 REGULAR CABSIERRA 3500SIERRA 3500 CREW CABSIERRA 3500 EXTENDED CABSIERRA 3500 REGULAR CAB
View all 3 generations of the GMC Sierra HD → 📋 Inspection checklist

Engine Reliability Ratings

L9H

6.2L 8-cyl
⚠️ Caution (3.4)
38 complaints 7.6 per year Flexible Fuel Vehicle (FFV)
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L20

4.8L 8-cyl
⚠️ Caution (3.4)
37 complaints 6.8 per year Gasoline
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Complaint Breakdown

safety systems
17
engine
6
fuel system
6
body
6
other
6

Known Issues

Safety Systems Issues (17 complaints)
Typical onset: 89,000–110,000 mi
Engine Issues (6 complaints)
Fuel System Issues (6 complaints)

LV3 - VVT, Aluminum, E85 Max

4.3L 6-cyl
⚠️ Caution (3.1)
38 complaints 12.0 per year Gasoline
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Complaint Breakdown

exterior
17
safety systems
6
transmission
6
suspension
4
body
4

Known Issues

Exterior Issues (17 complaints)
Safety Systems Issues (6 complaints)
Transmission Issues (6 complaints)

L61/LBZ

2.2L 4-cyl
⚠️ Caution (3.1)
12 complaints 12.0 per year Gasoline
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Complaint Breakdown

brakes
3
safety systems
2
wheels tires
2
electrical
1
fuel system
1

Known Issues

Brakes Issues (3 complaints)
Safety Systems Issues (2 complaints)
Wheels/Tires Issues (2 complaints)

LMM - Direct Port Injection

6.6L 8-cyl
⚠️ Caution (2.7)
29 complaints 29.0 per year
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Complaint Breakdown

electrical
8
body
5
fuel system
4
brakes
4
safety systems
3

Known Issues

Electrical System Issues (8 complaints)
Body/Trim Issues (5 complaints)
Fuel System Issues (4 complaints)

LY6

6.0L 8-cyl / 364 hp
⚠️ Caution (2.3)
94 complaints 22.0 per year Gasoline
1 fire report
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Complaint Breakdown

safety systems
39
brakes
11
steering
9
other
9
interior
8

Known Issues

Safety Systems Issues (39 complaints)
Brakes Issues (11 complaints)
Steering Issues (9 complaints)

LML

6.6L 8-cyl Turbo
⚠️ Caution (2.2)
188 complaints 46.5 per year Diesel
1 fire report
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LMM

6.6L 8-cyl
⚠️ Caution (2.1)
72 complaints 24.0 per year Diesel
1 fire report
View details

Complaint Breakdown

safety systems
38
other
10
brakes
7
electrical
6
body
4

Known Issues

Safety Systems Issues (38 complaints)
Brakes Issues (7 complaints)
Electrical System Issues (6 complaints)

LY5

5.3L 8-cyl
⚠️ Caution (2.0)
13 complaints 6.5 per year
1 fire report
View details

L96 - Flex Fuel: Gas/Ethanol, IRON

6.0L 8-cyl
Avoid (1.9)
38 complaints 7.0 per year Gasoline
1 fire report 1 fatality
View details

Complaint Breakdown

safety systems
11
wheels tires
6
electrical
6
body
5
other
3

Known Issues

Safety Systems Issues (11 complaints)
Wheels/Tires Issues (6 complaints)
Electrical System Issues (6 complaints)

LC9

5.3L 8-cyl
Avoid (1.1)
271 complaints 35.3 per year Gasoline
10 fire reports
View details

Complaint Breakdown

exterior
82
engine
37
electrical
35
other
34
body
32

Known Issues

Exterior Issues (82 complaints)
Engine Issues (37 complaints)
Est. repair: $5,800–$5,800 (6 reports)
Electrical System Issues (35 complaints)
Typical onset: 13,000–50,000 mi

4 additional engine variants with fewer than 10 complaints not shown.

Vehicle-Level Issues

These issues affect the GMC Sierra HD regardless of engine variant.

Safety Systems Issues (199 complaints)
safety_systems critical
Electrical System Issues (114 complaints)
electrical critical
Exterior Issues (99 complaints)
exterior critical
Body/Trim Issues (91 complaints)
body critical
Engine Issues (73 complaints)
engine critical

Alternatives in Heavy-Duty Truck

Frequently Asked Questions

What are the most common 2007-2014 GMC Sierra HD problems?

The 2007-2014 GMC Sierra HD has accumulated 1,106 NHTSA complaints. The most frequently reported problem areas are Safety Systems, Electrical System, Exterior. As with any used vehicle, a pre-purchase inspection and vehicle history report are recommended.

Which GMC Sierra HD engine is most reliable?

The 2007-2014 GMC Sierra HD was offered with 16 engine options. Based on NHTSA complaint data, the 5.3L 8-cyl has the lowest complaint density and is considered the most reliable choice for buyers.

Is the 2007-2014 GMC Sierra HD a good used car?

The 2007-2014 GMC Sierra HD can be a solid used car purchase depending on trim, mileage, and maintenance history. With 1,106 total NHTSA complaints on record, prospective buyers should review the known problem areas and check for open recalls before buying.

How many NHTSA complaints does the 2007-2014 GMC Sierra HD have?

The 2007-2014 GMC Sierra HD has 1,106 complaints filed with NHTSA as of our latest data pull. Complaint counts reflect owner-reported issues and do not necessarily indicate defects or safety risks on their own.

What recalls affect the 2007-2014 GMC Sierra HD?

There are 0 NHTSA recalls affecting some 2007-2014 GMC Sierra HD vehicles. Recall status varies by VIN — check the NHTSA recall database at recalls.nhtsa.dot.gov with your specific VIN to confirm which campaigns apply.

What should I check before buying a used GMC Sierra HD?

Before buying a used GMC Sierra HD, verify all open recalls are completed via the NHTSA VIN lookup tool. Pay particular attention to Safety Systems, Electrical System, Exterior, which are the most commonly reported problem areas. Request maintenance records, have an independent mechanic inspect the vehicle, and run a vehicle history report to check for prior accidents or title issues.

Does the Sierra HD have NHTSA crash test ratings?

NHTSA has not published crash test ratings for the 2007-2014 GMC Sierra HD. Not all vehicles are tested each year. For the latest NHTSA safety information, visit nhtsa.gov/ratings.

Data from NHTSA federal complaints database. 1,106 complaints analyzed. Data confidence: high. Last updated: 2026-04-07.

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