2025 Gmc SIERRA 2500

Problems, Recalls & Reliability Report

Above Average

Quick Summary

The 2025 Gmc SIERRA 2500 has 34 owner complaints filed with NHTSA — that's 0.4x the segment average of 80. The most common issue is steering problems (21% of all complaints), specifically: experienced loss of power steering, loss of brakes.

3 crash reports

Total Complaints

Recalls Issued

—/5

Safety Stars

0.4x

vs Segment Avg

Known Problems

STEERING

7 complaints

21%

• Experienced loss of power steering, loss of brakes
• The contact owns a 2025 GMC Sierra 2500. The contact stated that while driving at an undisclosed speed, after driving over a small pothole on the road, the alignment was dramatically altered, causing the vehicle to slightly veer out of the intended lane even though the steering wheel was centered. N
• While towing a less than 2000 lb trailer I had total loss of power steering when speeds dropped below about 5 mph. I got off interstate and was turning right at the end of exit ramp and I could barely turn the vehicle. At the next stop sign it did the same thing. I stopped turned off the vehicle and

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

“Experienced loss of power steering, loss of brakes”

— NHTSA complaint filing

OTHER

6 complaints

18%

• The truck is not even 2 weeks old and driving down the road at less than 50mph the sunroof exploded. Nothing fell on the sunroof and no other vehicles were near the truck at the time the sunroof busted.
• See attached document for complaint.
• See attached document for complaint.

Typical onset: 50K miles Est. repair: $500💥 1 crashes

“The truck is not even 2 weeks old and driving down the road at less than 50mph the sunroof exploded. Nothing fell on the sunroof and no other vehicles were near the truck at the time the sunroof busted.”

— NHTSA complaint filing

BRAKES

6 complaints

18%

• Experienced loss of power steering, loss of brakes
• We noticed that the brakes were really soft. We literally had to push on the brakes with excessive force. We took it to Lynch - West Bend, WI for a service call and was told that nothing was wrong with it. After leaving the dealership we did our own research (the hubby is a certified master techn
• The contact owns a 2025 GMC Sierra 2500. The contact stated that while depressing the brake pedal to come to a complete stop, the brakes made a loud whistling and squealing sound. There were no warning lights illuminated. The vehicle was taken to the dealer, Bellamy Strickland Chevrolet GMC (145 Ind

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

“Experienced loss of power steering, loss of brakes”

— NHTSA complaint filing

ENGINE

4 complaints

12%

• The contact owns a 2025 GMC Sierra 2500. The contact stated that while driving at an undisclosed speed, the vehicle failed to accelerate as intended while depressing the accelerator pedal. The check engine warning light was illuminated. In addition, the contact stated that the RPM was fluctuating wh
• We were towing a fifth wheel camper with our truck on an interstate highway in Pennsylvania when our serpentine belt burst suddenly and without warning. Our truck is a 2025 model with only 10,000 miles driven. We lost all power steering and power brakes of both the truck and the camper and the mot
• Burning an unusual amount of oil. Have seen several instances of blue smoke in the exhaust. Have had to add over a quart of oil twice in less than 6500 miles.

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

“The contact owns a 2025 GMC Sierra 2500. The contact stated that while driving at an undisclosed speed, the vehicle failed to accelerate as intended while depressing the accelerator pedal. The check engine warning light was illuminated. In addition, the contact stated that the RPM was fluctuating wh”

— NHTSA complaint filing

TRANSMISSION

3 complaints

• Transmission fluid overheating, which is a known issue in other GM models with 6.6L diesel with 12 speed allison transmission. Confirmed by warning message received on dashboard and transmission fluid temperature gauge. This occurred within 3 weeks of purchase. Dealer confirmed “Valve” needs to be r
• transmission locked up 8 times from 1,050 miles to current 3,885 miles. It has happens each time around 40 mph. Each time it’s like hitting the brakes. The 8th time it locked really hard like slamming on the brakes. I’m worried with winter months what will happen on snow/ice covered roads. Called de
• The transfer case leaked out all the fluid while driving over a period of time and damaged internal parts before the first oil change. This has happened 2 times now, and is currently leaking again with less than 10k miles.

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

“Transmission fluid overheating, which is a known issue in other GM models with 6.6L diesel with 12 speed allison transmission. Confirmed by warning message received on dashboard and transmission fluid temperature gauge. This occurred within 3 weeks of purchase. Dealer confirmed “Valve” needs to be r”

— NHTSA complaint filing

Estimated Repair Costs

STEERING(~50K mi)

$500

OTHER(~50K mi)

$500

BRAKES(~50K mi)

$500

ENGINE(~50K mi)

$500

TRANSMISSION(~50K mi)

$500

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

🔍 Pre-Purchase Inspection Checklist

Based on 34 owner complaints for this specific year, here's what to check or ask about:

☐
STEERING: Experienced loss of power steering, loss of brakes
Typically appears around 50K miles. Repair cost ~$500
☐
OTHER: The truck is not even 2 weeks old and driving down the road at less than 50mph the sunroof exploded. Nothing fell on the sunroof and no other vehicles were near the truck at the time the sunroof busted.
Typically appears around 50K miles. Repair cost ~$500
☐
BRAKES: Experienced loss of power steering, loss of brakes
Typically appears around 50K miles. Repair cost ~$500
☐
ENGINE: The contact owns a 2025 GMC Sierra 2500. The contact stated that while driving at an undisclosed speed, the vehicle failed to accelerate as intended while depressing the accelerator pedal. The check engine warning light was illuminated. In addition, the contact stated that the RPM was fluctuating wh
Typically appears around 50K miles. Repair cost ~$500
☐
General: Get a pre-purchase inspection from an independent mechanic ($100-$200)