2023 Gmc SIERRA 3500

Problems, Recalls & Reliability Report

Above Average

Quick Summary

The 2023 Gmc SIERRA 3500 has 41 owner complaints filed with NHTSA — that's 0.5x the segment average of 80. The most common issue is transmission problems (32% of all complaints), specifically: i received a p0747 and p0700 transmission codes on my gmc sierra 3500. it would not engage above 3rd gear and i almost was rear ended by a semi truck because i was unable to speed up. the vehicle cel turned on and "engine power reduced" notification appeared on my cluster. engine rpms were at 280.

7 crash reports

Total Complaints

Recalls Issued

—/5

Safety Stars

0.5x

vs Segment Avg

Known Problems

TRANSMISSION

13 complaints

32%

• I received a p0747 and p0700 transmission codes on my GMC sierra 3500. It would not engage above 3rd gear and I almost was rear ended by a Semi truck because I was unable to speed up. The vehicle CEL turned on and "Engine power reduced" notification appeared on my cluster. Engine RPMS were at 280
• Transmission had a hard shift which jolted the truck switching gears to a lower one unexpectedly. It caused my body to jerk back. It happened 3 times. 2 were mild but the 3rd time was extreme. Always while accelerating. Average speed was about 50 mph when this occurred. Dealer has confirmed a f
• We were traveling to our cabin in Southern Utah when the Transmission Control Solenoid Valve stuck in an "on" position. We were unable to accelerate more than 55 miles per hour. We stopped in St. George and went to the Chevy dealer for a fix. We were told that they could not get to our vehicle fo

Typical onset: 50K miles Est. repair: $500💥 2 crashes

“I received a p0747 and p0700 transmission codes on my GMC sierra 3500. It would not engage above 3rd gear and I almost was rear ended by a Semi truck because I was unable to speed up. The vehicle CEL turned on and "Engine power reduced" notification appeared on my cluster. Engine RPMS were at 280”

— NHTSA complaint filing

DRIVER ASSIST/CAMERAS

4 complaints

10%

• On March 22, 2023, my wife and I purchased a new 2023 GMC Sierra 3500 Denali from Coast Buick GMC. Before purchasing, we asked the salesman if it had adaptive cruise control and lane keep assist, and he said yes and showed us the buttons and explained how they worked. We purchased the truck because
• On Christmas Day 2025 my Tailgate flies open on its own and I see my cargo flying out and a piece of it bounced off my taillight passenger side braking the taillight and then when attempting to pull over my lane departing feature try’s to correct its self and I hit the median luckily at slower than
• On Christmas Day 2025 my Tailgate flies open on its own and I see my cargo flying out and a piece of it bounced off my taillight passenger side braking the taillight and then when attempting to pull over my lane departing feature try’s to correct its self and I hit the median luckily at slower than

Typical onset: 50K miles Est. repair: $500💥 3 crashes

“On March 22, 2023, my wife and I purchased a new 2023 GMC Sierra 3500 Denali from Coast Buick GMC. Before purchasing, we asked the salesman if it had adaptive cruise control and lane keep assist, and he said yes and showed us the buttons and explained how they worked. We purchased the truck because ”

— NHTSA complaint filing

ELECTRICAL

4 complaints

10%

• We’ve had issues with the electrical system/brake lights when we hook any trailer (horse/boat/utility) to the truck. One issue is that the system shows unconnected and the trailer lights blink or do not work. We’ve brought this in to the dealer 3 times and they have yet to resolve the issue. The oth
• There are 2 issues with this vehicle: #1) The rear window defrost causes an electrical issue that melted the plastic on our rear sliding window. Dealer claims we put something hot against the window but we did not. This appeared after we used the rear defrost. Several other owners have complained a
• My truck has the shift to park issue and won’t allow me to shut the vehicle ignition off and I cannot shut the vehicle ignition off and it is unsafe and keeps me trapped in my vehicle. I have noticed that it is a common issue and recall on many gmc trucks and I took it to the dealership and they are

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

“We’ve had issues with the electrical system/brake lights when we hook any trailer (horse/boat/utility) to the truck. One issue is that the system shows unconnected and the trailer lights blink or do not work. We’ve brought this in to the dealer 3 times and they have yet to resolve the issue. The oth”

— NHTSA complaint filing

ENGINE

4 complaints

10%

• The contact owns a 2023 GMC Sierra 3500. The contact stated that while driving approximately 60 MPH, the messages "Service Charging System" and "Service Diesel Emissions System" were displayed, and suddenly the power steering and power brakes malfunctioned, causing the contact to almost lose control
• I was driving in the high way and the vehicle started having issues and then it completely shut off and wouldn’t drive or anything in the middle of the highway and the dash said it was reducing power.
• I have had an incident where my 2023 gmc 3500 hd was had left me stranded earler this week. i towed the new truck to a certified dealer and i haven't heard anything since then. they mentioned my transmission will need to be fully replaced because valve body issues of solenoid a,e,f, are stuck open a

Typical onset: 50K miles Est. repair: $500💥 2 crashes

“The contact owns a 2023 GMC Sierra 3500. The contact stated that while driving approximately 60 MPH, the messages "Service Charging System" and "Service Diesel Emissions System" were displayed, and suddenly the power steering and power brakes malfunctioned, causing the contact to almost lose control”

— NHTSA complaint filing

SPEED CONTROL

3 complaints

• On March 22, 2023, my wife and I purchased a new 2023 GMC Sierra 3500 Denali from Coast Buick GMC. Before purchasing, we asked the salesman if it had adaptive cruise control and lane keep assist, and he said yes and showed us the buttons and explained how they worked. We purchased the truck because
• We’ve had issues with the electrical system/brake lights when we hook any trailer (horse/boat/utility) to the truck. One issue is that the system shows unconnected and the trailer lights blink or do not work. We’ve brought this in to the dealer 3 times and they have yet to resolve the issue. The oth
• There are 2 issues with this vehicle: #1) The rear window defrost causes an electrical issue that melted the plastic on our rear sliding window. Dealer claims we put something hot against the window but we did not. This appeared after we used the rear defrost. Several other owners have complained a

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

— NHTSA complaint filing

Estimated Repair Costs

TRANSMISSION(~50K mi)

$500

DRIVER ASSIST/CAMERAS(~50K mi)

$500

ELECTRICAL(~50K mi)

$500

ENGINE(~50K mi)

$500

SPEED CONTROL(~50K mi)

$500

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

🔍 Pre-Purchase Inspection Checklist

Based on 41 owner complaints for this specific year, here's what to check or ask about:

☐
TRANSMISSION: I received a p0747 and p0700 transmission codes on my GMC sierra 3500. It would not engage above 3rd gear and I almost was rear ended by a Semi truck because I was unable to speed up. The vehicle CEL turned on and "Engine power reduced" notification appeared on my cluster. Engine RPMS were at 280
Typically appears around 50K miles. Repair cost ~$500
☐
DRIVER ASSIST/CAMERAS: On March 22, 2023, my wife and I purchased a new 2023 GMC Sierra 3500 Denali from Coast Buick GMC. Before purchasing, we asked the salesman if it had adaptive cruise control and lane keep assist, and he said yes and showed us the buttons and explained how they worked. We purchased the truck because
Typically appears around 50K miles. Repair cost ~$500
☐
ELECTRICAL: We’ve had issues with the electrical system/brake lights when we hook any trailer (horse/boat/utility) to the truck. One issue is that the system shows unconnected and the trailer lights blink or do not work. We’ve brought this in to the dealer 3 times and they have yet to resolve the issue. The oth
Typically appears around 50K miles. Repair cost ~$500
☐
ENGINE: The contact owns a 2023 GMC Sierra 3500. The contact stated that while driving approximately 60 MPH, the messages "Service Charging System" and "Service Diesel Emissions System" were displayed, and suddenly the power steering and power brakes malfunctioned, causing the contact to almost lose control
Typically appears around 50K miles. Repair cost ~$500
☐
General: Get a pre-purchase inspection from an independent mechanic ($100-$200)