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#BS-2018-GMCSIE-79CE

2018 GMC Sierra 1500Problems, Recalls & Reliability

Based on reports from 432 owners and 7 recalls for this exact model.

Data updated ·checked October 30, 2026 · NHTSA complaints through October 28, 2026

Complaints
432
Crashes
16
Fires
3
Recalls
7
TSBs
956
🟡

Preliminary Verdict

Think Twice

Based on 432 complaints, 16 crashes, 3 fires, and 7 recalls.

See full verdict with buy/skip conditions

Top reported problems

1

hard shifts

5 complaints • Severity 6.4/10

$X,XXX
2

shuddering

5 complaints • Severity 8/10

$X,XXX
3

hesitation surging

4 complaints • Severity 7/10

$X,XXX
4

engine failure

3 complaints • Severity 10/10

$X,XXX
5

knocking inside the engine

3 complaints • Severity 9.3/10

$X,XXX

Preview: What's in your full report

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Mechanic Inspection Checklist

!Check the DrivetrainHIGH

129 owners reported drivetrain issues — failures commonly reported around 33K miles.

!Inspect the EngineMED
Look for symptoms of wear and premature failure
+ 6 more items in full checklistUnlock

Failure Timeline by Mileage

73
0–30K
40
30–60K
20
60–90K
9
90–120K
9
120–150K
4
150K+

Peak failure range: 0–30K miles (73 reports) • Median: 33K miles

Full report: which components fail at each mileageUnlock

30,000-Mile Cost Projection

Best Case

$X,XXX

Most Likely

$X,XXX

Worst Case

$X,XXX

Top cost driver: Drivetrain (129 reports).

Includes fuel costs, common repairs, and recall riskUnlock

Also in your report

Owner Intelligence

AI-synthesized themes from real complaints

Buyer Lot Checklist

Questions, test drive checks, walk-away triggers

Negotiation Talking Points

Data-backed dollar deductions

Buy / Skip Verdict

Final recommendation with conditions

10 sections total in the full reportUnlock all

Where the complaints fall

Drivetrain129 (30%)
Engine72 (17%)
Brakes44 (10%)
Electrical41 (9%)
Steering30 (7%)
Other25 (6%)
Suspension11 (3%)
Fuel System11 (3%)

2018 GMC Sierra 1500: Known Issues & Problem Areas

Drivetrain Issues

Drivetrain complaints account for 30% of all reports filed for the 2018 GMC Sierra 1500, with 129 owners filing complaints with NHTSA. The median mileage at time of complaint is 33,000 miles, suggesting issues tend to surface around the 33K-mile mark.

Engine Issues

Engine complaints account for 17% of all reports filed for the 2018 GMC Sierra 1500, with 72 owners filing complaints with NHTSA. Owners should pay attention to engine-related symptoms during test drives and pre-purchase inspections.

Brakes Issues

Brakes complaints account for 10% of all reports filed for the 2018 GMC Sierra 1500, with 44 owners filing complaints with NHTSA. Owners should pay attention to brakes-related symptoms during test drives and pre-purchase inspections.

Electrical Issues

Electrical complaints account for 9% of all reports filed for the 2018 GMC Sierra 1500, with 41 owners filing complaints with NHTSA. Owners should pay attention to electrical-related symptoms during test drives and pre-purchase inspections.

Data sourced from NHTSA owner complaints and community reports. The full report analyzes severity, repair costs, and failure patterns for each category.

Complaint trend by year

22
18
41
19
36
20
31
21
68
22
38
23
57
24
97
25
42
26

Complaints filed with NHTSA by year for the 2018 GMC Sierra 1500. Recent trend: decreasing.

Don't negotiate blind — know what this car costs to own

Repair costs • Negotiation scripts • Mechanic checklist • Buy/skip verdict

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Recall History (7 recalls)

19V645000Oct 2019

SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM

General Motors LLC (GM) is recalling certain 2015-2017 Cadillac Escalade, 2014-2018 Chevrolet Silverado, GMC Sierra, 2015-2018 Chevrolet Suburban, Tahoe, GMC Yukon vehicles. The amount of vacuum created by the vacuum pump may decrease over time.

19V761000Dec 2019

SERVICE BRAKES

General Motors LLC (GM) is recalling certain 2015-2020 Chevrolet Suburban, Tahoe, and GMC Yukon, and 2014-2018 Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles equipped with a 5.3-liter engine, a 3.08-ratio rear axle and four-wheel drive. If a wheel-speed sensor fails, while the vehicle is traveling between 41 and 60 mph in four-wheel or automatic mode, the Electronic-Brake Control Module (EBCM) software may activate the driveline-protection system.

20V603000Nov 2020

SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM

General Motors LLC (GM) is recalling certain 2018 Cadillac Escalade, Chevrolet Silverado 1500 and Tahoe, GMC Sierra 1500 and Yukon vehicles equipped with either a 5.3L or 6.2L V8 engine. The output of the mechanical vacuum pump can decrease over time, decreasing the amount of vacuum/power brake assist.

24V756000Nov 2024

AIR BAGS:SIDE/WINDOW:CURTAIN:INFLATOR

General Motors, LLC (GM) is recalling certain 2018 Chevrolet Silverado 1500, GMC Sierra 1500, 2018-2019 Chevrolet Silverado 2500, 3500, and GMC Sierra 2500, 3500 Crew Cab trucks. The left or right-side roof-rail air bag (RRAB) inflator end cap may detach from the inflator or the inflator sidewall may rupture.

25V432000Jul 2025

AIR BAGS

General Motors (GM) is recalling certain 2018 GMC Sierra 1500, 2019 Sierra 2500, 3500, Chevrolet Silverado 3500, and Chevrolet Silverado 2500 and 2018 Chevrolet Silverado 1500 Crew Cab vehicles. The left or right-side roof-rail air bag (RRAB) inflator end cap may detach from the inflator or the inflator sidewall may rupture.

+ 2 more recalls in the full report

Recall severity analysis & seller scripts

The full report rates each recall's severity and gives you scripts for asking the seller about recall completion.

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2018 GMC Sierra 1500 NHTSA Safety Ratings

Overall

★★★★★

5 of 5 stars

Frontal crash

★★★★★

5 of 5 stars

Side crash

★★★★★

5 of 5 stars

Rollover

★★★★★

4 of 5 stars

From NHTSA's New Car Assessment Program (5-Star Safety Ratings). Where NHTSA tested more than one version of this vehicle, the lowest rating is shown.

The worst model year for the GMC Sierra 1500 is the 2015 — worth knowing if you're cross-shopping years. The biggest problem area is engine.

About this data

NHTSA Complaints

Federal database of owner-filed safety complaints. 432 records for this vehicle.

NHTSA Recalls

Manufacturer-issued safety recalls. 7 recalls found for this vehicle.

Repair Cost Data

Real-world repair costs from owner reports and independent databases.

Last updated (checked October 30, 2026). NHTSA complaints received through October 28, 2026; safety ratings from NHTSA's 5-Star program.

Other GMC Sierra 1500 Model Years

202620252024202320222021202020192018201720162015201420132012201120102009200820072006200520042003200220012000199919981997199619951994
View all GMC Sierra 1500 years →

2018 GMC Sierra 1500: Frequently Asked Questions

What is the most common problem with the 2018 GMC Sierra 1500?
The most commonly reported issue with the 2018 GMC Sierra 1500 is related to the drivetrain, with 129 complaints filed with NHTSA.
Is the 2018 GMC Sierra 1500 reliable?
The 2018 GMC Sierra 1500 has 432 complaints, 16 crash reports, and 3 fire reports filed with NHTSA. The full report analyzes whether these numbers indicate real risk or are proportional to the vehicle’s popularity.
How safe is the 2018 GMC Sierra 1500?
NHTSA rates the 2018 GMC Sierra 1500 5 out of 5 stars overall, with 5 stars in frontal crash tests, 5 stars in side crash tests, 4 stars for rollover resistance. Where NHTSA tested more than one version, the lowest rating is shown.
How much does it cost to fix 2018 GMC Sierra 1500 problems?
Repair costs vary by issue. The full BumperScan report includes detailed repair cost estimates (low/median/high) for every major issue, plus a 30,000-mile total cost of ownership projection.
Does the 2018 GMC Sierra 1500 have any recalls?
Yes, the 2018 GMC Sierra 1500 has 7 recalls on record. The full report includes recall severity analysis and scripts for asking the seller about recall completion.
What mileage do GMC Sierra 1500 problems start?
Based on 155 complaints with mileage data, the median mileage at time of complaint is 33,000 miles. The highest concentration of reported issues occurs in the 0–30K mile range. The full report breaks down exactly which components fail at each mileage bracket.
When was the 2018 GMC Sierra 1500 data last updated?
BumperScan last checked this vehicle against NHTSA on October 30, 2026, covering owner complaints received through October 28, 2026 plus the latest recalls, investigations and technical service bulletins. Its numbers last changed on October 21, 2026.
What’s in the full report?
10 sections of AI analysis: severity-ranked issues, component scores (0-100), 30K-mile cost projection, failure timeline by mileage, recall details with seller scripts, owner sentiment analysis, mechanic checklist, buyer lot checklist, negotiation ammo with dollar figures, and a buy/skip verdict.
How is this different from free NHTSA data?
NHTSA gives you raw complaint text. BumperScan cross-references 2.1M+ complaints with community repair cost data, EPA fuel data, and recall records — then uses AI to synthesize it into actionable advice with dollar figures.
How is this different from Carfax?
Carfax is VIN-specific history ($45/report). BumperScan is model-level reliability intelligence — what problems this car is known for, what they cost, and whether you should buy it. Complementary, not competing.
What if the report isn’t useful?
100% money-back guarantee. If the report doesn’t help you make a more informed decision, we’ll refund you — no questions asked.
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