Is the 2012 Gmc SIERRA DENALI reliable?

The 2012 Gmc SIERRA DENALI has 15 complaints filed with NHTSA (0.8x the segment average). Our reliability verdict: above-average. Most common issue: STEERING problems.

What are common problems with the 2012 Gmc SIERRA DENALI?

Top problems: STEERING (4 complaints, avg repair $500); OTHER (4 complaints, avg repair $500); BRAKES (2 complaints, avg repair $500). Issues typically appear around 50K miles.

Are there any recalls on the 2012 Gmc SIERRA DENALI?

No recalls have been issued for the 2012 Gmc SIERRA DENALI.

How much does it cost to insure a 2012 Gmc SIERRA DENALI?

Estimated US average full-coverage insurance for the 2012 Gmc SIERRA DENALI is approximately $1,478/year (sedan-midsize class). Actual quotes vary heavily by state, driver age, driving record, and credit — see the interactive insurance estimator on this page for state-specific pricing.

2012 Gmc SIERRA DENALI

Problems, Recalls & Reliability Report

Above Average

Quick Summary

The 2012 Gmc SIERRA DENALI has 15 owner complaints filed with NHTSA — that's 0.8x the segment average of 19. The most common issue is steering problems (27% of all complaints), specifically: loss of steering control (three episodes) : 13 nov 2012, while exiting nb i-95 onto eb route 214 in landover, md, my steering wheel locked. my speed at the time was approximately 50 mph. i was able to brake rapidly as the ramp began to straighten from it's sweeping right curve. the locked steeri.

Total Complaints

Recalls Issued

—/5

Safety Stars

0.8x

vs Segment Avg

Known Problems(top 5 of 7)

STEERING

4 complaints

27%

• LOSS OF STEERING CONTROL (THREE EPISODES) : 13 NOV 2012, WHILE EXITING NB I-95 ONTO EB ROUTE 214 IN LANDOVER, MD, MY STEERING WHEEL LOCKED. MY SPEED AT THE TIME WAS APPROXIMATELY 50 MPH. I WAS ABLE TO BRAKE RAPIDLY AS THE RAMP BEGAN TO STRAIGHTEN FROM IT'S SWEEPING RIGHT CURVE. THE LOCKED STEERI
• 2012 GMC DENALI. CONSUMER WRITES IN REGARDS TO VEHICLE STEERING PROBLEMS. *SMD THE CONSUMER NOTICED A VERY BAD PROBLEM WITH THE STEERING WHENEVER HE SLOWED DOWN TO TURN, HE WOULD LOOSE CONTROL OVER THE ABILITY TO TURN. THE WHEEL LOCKED DOWN WHEN HE APPLIED THE BRAKE AND TRIED TO TURN AT THE SAME
• AFTER EXITING INTERSTATE LOST STEERING AND BRAKES BRIEFLY IN PARKING LOT. PUMPED BRAKE AND BOTH RETURNED AFTER A HISSING SOUND. RECURRED A FEW TIMES IN NEXT 6 MONTHS OR SO. THEN, IN THE FALL OF 2013, LOST STEERING AND BRAKES ON I-49/US71B HEADING SOUTH FROM JOPLIN, MISSOURI. YOU COULD PUMP THE BR

Typical onset: 50K miles Est. repair: $500

“LOSS OF STEERING CONTROL (THREE EPISODES) : 13 NOV 2012, WHILE EXITING NB I-95 ONTO EB ROUTE 214 IN LANDOVER, MD, MY STEERING WHEEL LOCKED. MY SPEED AT THE TIME WAS APPROXIMATELY 50 MPH. I WAS ABLE TO BRAKE RAPIDLY AS THE RAMP BEGAN TO STRAIGHTEN FROM IT'S SWEEPING RIGHT CURVE. THE LOCKED STEERI”

— NHTSA complaint filing

When Problems Appear on the 2012 Gmc SIERRA DENALI

Based on 12 owner complaints that included an odometer reading. Median mileage at time of complaint: 43K miles. Most complaints cluster in the 30-60K miles range.

Overall complaint distribution by mileage

0-30K

30-60K

60-100K

100-150K

150-200K

200K+

Mileage figures are self-reported by owners in NHTSA complaint filings. Peak bucket = the mileage range with the most complaints for that component; it reflects when owners noticed and reported problems, not necessarily when the fault first occurred.

Estimated Insurance Cost for 2012 Gmc SIERRA DENALI

Estimate only, not a quote. Modeled from NAIC + HLDI averages for a hypothetical 35-year-old driver with clean record + full coverage. Your actual quote depends heavily on your age, driving history, credit, ZIP code, and insurer.

Your state (affects local premium average)

Full coverage / year

$1,478

Full coverage / month

$123

Liability only / year

$611

vs US avg

-12%

How this estimate is calculated

US base full-coverage premium$1674

× state (US)1.00x

× vehicle class (sedan-midsize)0.96x

× theft risk1.00x

× safety rating1.00x

× vehicle age0.92x

= Full coverage estimate$1478

Coverage assumed: 100/300/100 liability + comprehensive/collision, $500 deductibles. Data sources: NAIC 2024 + HLDI loss studies.

Maintenance & Warranty

Recommended Gmc SIERRA DENALI Service Intervals

Oil change

8K mi / 12 mo

Tire rotation

8K mi

Brake fluid

36 months

Transmission fluid

45K mi

Engine coolant

150K mi

Spark plugs

100K mi

Cabin air filter

23K mi

Engine air filter

45K mi

Differential (AWD/4WD)

45K mi

Uses GM Oil Life System. Full-size trucks may have shorter differential and transfer case intervals if used for towing.

"Severe service" conditions (heavy towing, extreme temps, city stop-and-go) typically halve these intervals. Always consult your vehicle's owner's manual for the authoritative schedule.

Gmc New-Vehicle Warranty Coverage

Bumper-to-bumper (basic)

3 yr / 36K mi

Powertrain

5 yr / 60K mi

Hybrid/EV battery

8 yr / 100K mi

Corrosion (rust perforation)

6 yr / 100K mi

Roadside assistance

5 yr / 60K mi

These are the terms for a new Gmc. If you're buying a used 2012 SIERRA DENALI, remaining coverage is usually pro-rated from the vehicle's original in-service date. Not all coverage transfers between owners — check with a Gmc dealer for VIN-specific remaining warranty.

Estimated Repair Costs

STEERING(~50K mi)

$500

OTHER(~50K mi)

$500

BRAKES(~50K mi)

$500

BODY/STRUCTURE(~50K mi)

$500

TIRES(~50K mi)

$500

Estimates based on average reported repair costs. Actual costs vary by location, shop, and severity.

🔍 Pre-Purchase Inspection Checklist

Based on 15 owner complaints for this specific year, here's what to check or ask about:

☐
STEERING: LOSS OF STEERING CONTROL (THREE EPISODES) : 13 NOV 2012, WHILE EXITING NB I-95 ONTO EB ROUTE 214 IN LANDOVER, MD, MY STEERING WHEEL LOCKED. MY SPEED AT THE TIME WAS APPROXIMATELY 50 MPH. I WAS ABLE TO BRAKE RAPIDLY AS THE RAMP BEGAN TO STRAIGHTEN FROM IT'S SWEEPING RIGHT CURVE. THE LOCKED STEERI
Typically appears around 50K miles. Repair cost ~$500
☐
OTHER: 2012 GMC DENALI. CONSUMER WRITES IN REGARDS TO VEHICLE STEERING PROBLEMS. *SMD THE CONSUMER NOTICED A VERY BAD PROBLEM WITH THE STEERING WHENEVER HE SLOWED DOWN TO TURN, HE WOULD LOOSE CONTROL OVER THE ABILITY TO TURN. THE WHEEL LOCKED DOWN WHEN HE APPLIED THE BRAKE AND TRIED TO TURN AT THE SAME
Typically appears around 50K miles. Repair cost ~$500
☐
BRAKES: 2012 GMC DENALI. CONSUMER WRITES IN REGARDS TO VEHICLE STEERING PROBLEMS. *SMD THE CONSUMER NOTICED A VERY BAD PROBLEM WITH THE STEERING WHENEVER HE SLOWED DOWN TO TURN, HE WOULD LOOSE CONTROL OVER THE ABILITY TO TURN. THE WHEEL LOCKED DOWN WHEN HE APPLIED THE BRAKE AND TRIED TO TURN AT THE SAME
Typically appears around 50K miles. Repair cost ~$500
☐
BODY/STRUCTURE: TL* THE CONTACT OWNS A 2012 GMC SIERRA DENALI. THE CONTACT STATED THAT THE DASHBOARD CRACKED. THE CONTACT MENTIONED THAT A RATTLING SOUND EMITTED FROM THE DASHBOARD. THE VEHICLE WAS TAKEN TO A DEALER. THE TECHNICIAN DIAGNOSED THAT THE DASHBOARD NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. TH
Typically appears around 50K miles. Repair cost ~$500
☐
General: Get a pre-purchase inspection from an independent mechanic ($100-$200)