Is the 2020 Gmc SIERRA 2500 reliable?

The 2020 Gmc SIERRA 2500 has 106 complaints filed with NHTSA (2.0x the segment average). Our reliability verdict: below-average. Most common issue: TRANSMISSION problems.

What are common problems with the 2020 Gmc SIERRA 2500?

Top problems: TRANSMISSION (22 complaints, avg repair $500); OTHER (18 complaints, avg repair $500); BRAKES (12 complaints, avg repair $500). Issues typically appear around 50K miles.

Are there any recalls on the 2020 Gmc SIERRA 2500?

Yes, there are 9 recall(s): LATCHES/LOCKS/LINKAGES:HOOD:LATCH, TIRES:TEMPORARY/EMERGENCY SPARE TIRE, SEAT BELTS, AIR BAGS:SIDE/WINDOW:CURTAIN:INFLATOR, SEAT BELTS:PRETENSIONER, STRUCTURE:BODY:HOOD, LATCHES/LOCKS/LINKAGES:TAILGATE:LATCH, POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE, POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE. Contact any Gmc dealer to verify if recalls have been completed on your specific vehicle.

How much does it cost to insure a 2020 Gmc SIERRA 2500?

Estimated US average full-coverage insurance for the 2020 Gmc SIERRA 2500 is approximately $1,607/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.

2020 Gmc SIERRA 2500

Problems, Recalls & Reliability Report

Below Average

Quick Summary

The 2020 Gmc SIERRA 2500 has 106 owner complaints filed with NHTSA — that's 2.0x the segment average of 52. The most common issue is transmission problems (21% of all complaints), specifically: there is an issue that is causing the batteries to die. this in return causes the vehicle to go into limp home mode with no warning. the "issue" was supposed to be resolved by the dealer in march 2022. the resolution was that one battery was bad. the vehicle is equipped with two batteries. each of w. There are 9 recalls issued for this model year. ⚠️ 6 fire reports filed.

6 fire reports

106

Total Complaints

Recalls Issued

—/5

Safety Stars

2.0x

vs Segment Avg

Known Problems(top 5 of 8)

TRANSMISSION

22 complaints

21%

• There is an issue that is causing the batteries to die. This in return causes the Vehicle to go into Limp home mode with no warning. The "issue" was supposed to be resolved by the Dealer in March 2022. The resolution was that one battery was bad. The vehicle is equipped with two batteries. Each of w
• The contact owns a 2020 GMC Sierra 2500. The contact stated while driving approximately 65 MPH, the vehicle lost motive power. The contact stated that he had not depressed the brake pedal. The contact was towing a 20-foot flatbed trailer with a load of lumber of approximately 4,000 lbs. in weight. T
• The contact owns a 2020 GMC Sierra 2500. The contact received notification of NHTSA Campaign Number: 24V797000 (Power Train); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer

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

“There is an issue that is causing the batteries to die. This in return causes the Vehicle to go into Limp home mode with no warning. The "issue" was supposed to be resolved by the Dealer in March 2022. The resolution was that one battery was bad. The vehicle is equipped with two batteries. Each of w”

— NHTSA complaint filing

When Problems Appear on the 2020 Gmc SIERRA 2500

Based on 33 owner complaints that included an odometer reading. Median mileage at time of complaint: 25K miles. Most complaints cluster in the 0-30K miles range.

Overall complaint distribution by mileage

0-30K

30-60K

60-100K

100-150K

150-200K

200K+

BRAKES

In line with typicalmedian 1K mi · 5 reports

0-30K

30-60K

60-100K

100-150K

150-200K

200K+

TRANSMISSION

High-mileage issuemedian 114K mi · 7 reports

0-30K

30-60K

60-100K

100-150K

150-200K

200K+

ENGINE

High-mileage issuemedian 100K mi · 5 reports

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.

Recalls (9)

LATCHES/LOCKS/LINKAGES:HOOD:LATCH12/03/2020

General Motors LLC (GM) is recalling certain 2020 Chevrolet Silverado 2500 and 3500 and GMC Sierra 2500 and 3500 vehicles. The hood-latch striker wires may not have been heat-treated properly, possibly causing them to fracture.

Risk: If a striker wire fractures, the hood may open unexpectedly while driving, increasing the risk of a crash.

Fix: GM will notify owners, and dealers will replace the hood assembly, free of charge. The recall began April 13, 2020. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-888-988-7267. GM's number for this recall is N192284960.

Estimated Insurance Cost for 2020 Gmc SIERRA 2500

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

$1,607

Full coverage / month

$134

Liability only / year

$611

vs US avg

-4%

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 age1.00x

= Full coverage estimate$1607

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

Maintenance & Warranty

Recommended Gmc SIERRA 2500 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 2020 SIERRA 2500, 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

TRANSMISSION(~50K mi)

$500

OTHER(~50K mi)

$500

BRAKES(~50K mi)

$500

ELECTRICAL(~50K mi)

$500

ENGINE(~50K mi)

$500

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

🔍 Pre-Purchase Inspection Checklist

Based on 106 owner complaints for this specific year, here's what to check or ask about:

☐
TRANSMISSION: There is an issue that is causing the batteries to die. This in return causes the Vehicle to go into Limp home mode with no warning. The "issue" was supposed to be resolved by the Dealer in March 2022. The resolution was that one battery was bad. The vehicle is equipped with two batteries. Each of w
Typically appears around 50K miles. Repair cost ~$500
☐
OTHER: TL* THE CONTACT OWNS A 2020 GMC SIERRA 2500. WHILE DRIVING 5 MPH, THE BRAKES ENGAGED AUTOMATICALLY AND THE TRACTION CONTROL WARNING INDICATOR ILLUMINATED. THE VEHICLE WAS TAKEN SEVERAL TIMES TO CARL BLACK CHEVROLET BUICK GMC (LOCATED AT 1110 ROBERTS BOULEVARD NORTHWEST, KENNESAW, GA 30144, (888) 457
Typically appears around 50K miles. Repair cost ~$500
☐
BRAKES: TL* THE CONTACT OWNS A 2020 GMC SIERRA 2500. WHILE DRIVING 5 MPH, THE BRAKES ENGAGED AUTOMATICALLY AND THE TRACTION CONTROL WARNING INDICATOR ILLUMINATED. THE VEHICLE WAS TAKEN SEVERAL TIMES TO CARL BLACK CHEVROLET BUICK GMC (LOCATED AT 1110 ROBERTS BOULEVARD NORTHWEST, KENNESAW, GA 30144, (888) 457
Typically appears around 50K miles. Repair cost ~$500
☐
ELECTRICAL: 2020 GMC SIERRA DENALI DURAMAX 3000 MILES TRIED TURNING ON TRUCK THIS MORNING TO GO TO WORK AND WOULD NOT EVEN CRANK IT IS A PUSH START OPTION HAVE NO CLUE ON HOW IM GOING TO TAKE IT TO THE DEALERSHIP IF I CANT GET IT OF PARK INTO NEUTRAL FOR A TOW TRUCK AT LEAST ! TRUCK DOES NOT CRANK IT THROWS M
Typically appears around 50K miles. Repair cost ~$500
☐
RECALLS: Verify all 9 recalls have been completed — free at any Gmc dealer
☐
General: Get a pre-purchase inspection from an independent mechanic ($100-$200)