2021 Chevrolet Suburban · symptom sheet
Engine stalls or loses power while driving
- 43owner reports
- 45,500median miles
- $1,301median quote
- 0involved a crash
Newest report Sep 15, 2026 · checked Oct 2, 2026
158 of the 198 complaints on this car are about the engine. 43 of those describe stalling, which makes it the most reported problem on the 2021 Suburban.
Tick what matches of 43 reports
Stalling on other Suburban years
Report counts are for each model year on its own, so a newer car has had less time to collect them. Model years with too few reports of it for a sheet: 2016, 2017.
What this problem usually is
Stalling reports are some of the most alarming on the site. The engine quits while the car is moving, sometimes on a highway and sometimes at a stop. Many owners say it restarted right away and the dealer found no stored code, which is part of why these complaints pile up before anything gets fixed.
What got replaced
Owners who name the part that was replaced mention the fuel pump (9 reports) and the battery (4 reports).
Recalls and investigations
4 recalls on the engine cover the 2021 model year. A recall on the same system isn't always the same failure, so read the defect text.
The connecting rod and/or crankshaft engine components may have manufacturing defects that can lead to engine damage and engine failure.
The transmission control valve may fail and cause the rear wheels to lock-up.
The rear wheel driveshaft assemblies may have internal components that were not heat-treated properly, possibly resulting in driveshaft failure.
The fuel pump power control module may cause the fuel pump to fail or operate intermittently, which can interrupt fuel flow to the engine, and cause an unexpected engine stall.
All 12 recalls on the 2021 Chevrolet Suburban, with the owner complaints on each recalled system
NHTSA investigations into the engine on the Suburban
Loss of motive power due to engine failure post recall remedy. Open.
Loss of motive power due to engine failure post recall remedy. Closed aug 20, 2026.
Loss of motive power due to engine failure. Open.
Loss of motive power due to engine failure. Closed oct 23, 2025, led to recall 25V-274.
Crank position sensor failure - stall. Closed sep 14, 2006.
Overheated fuel pump wiring. Closed aug 2, 2005, led to recall 05V-155.
Overheated fuel pump wiring. Closed sep 9, 2004, led to recall 05V-155.
Battery leaks acid. Closed jun 28, 2002.
Underseat vehicle fires. Closed mar 17, 1997.
Engine compartment fires. Closed jul 31, 1996.
What owners paid
10 of the 43 reports quote a price. Each dot is one quote. The middle half runs $142 to $5,010.
When it happens
The middle half of failures fell between 30,000 and 90,000 miles, from the 17 reports that gave a mileage.
Is this a known problem?
The manufacturer has sent NHTSA 13 service bulletins or notices for the 2021 Chevrolet Suburban that deal with this problem. Newest first.
Federal rules make a manufacturer send NHTSA a copy of any notice about a defect that goes to more than one dealer or owner. Most of these are service bulletins, the repair instructions manufacturers send to dealers. NHTSA generally leaves safety recall bulletins out of this file, and recalls are listed separately.
This service bulletin advises the technician to check if the transmission cooler lines are twisted to correct customer concerns of Harsh Shift, Shudder, Surge, Stall, Transmission Overheating and/or High Transmission Fluid Temperature.
This service bulletin provides a procedure to replace the FPDCM if found to cause customers concerns of Crank No Start, Stalling, Malfunction Indicator Lamp (MIL) Illuminated – DTC P023F or P129F Set.
This engineering information (EI) closure ends the need for gathering further information from technicians in regard to the vehicle having loss of power and/or having the MIL illuminated on DIC.
This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regard to the vehicle having loss of power and/or having the MIL illuminated on the Driver Information Center ...
9 more on the 2021 Chevrolet Suburban page.
What owners wrote
“Pulled out in 4 lane traffic. Got almost to 55mph. Vehicle lost all power, slowed down and auto shifted to neutral, vehicle stopped and went to park. Vehicle would not start back nor transition to Neutral to remove from highways. 2021 suburban with just 35,000miles. Shut down a lane on a 55mph highway. Code P129F”
Filed Jul 26, 2026 · 35,000 miles
“Vehicle stalled during routine driving. Code P129F. I was stranded in 95 degree weather with three small children. Please correct and advise ASAP. Had to be towed home. Vehicle inoperable.”
Filed May 31, 2026
“The car was driving at 60 MPH on a regular commute to work and the car was stalling and shaking and soon after the check engine light came on with multiple issues.”
Filed Dec 27, 2025
“Engine while driving completely seized up. Crank shaft, cam shaft and oil pump water pump replaced. Low oil pressure alarm code present then sudden loss of power. Piston blown. There are similar recalls to 2021 suburbans however, this specific model is not in the recall. I was told I need a completely new engine. The car died in the middle of traffic and police had to call an emergency tow truck.”
Filed Oct 4, 2025
Should you keep driving it?
This page can't tell you that. 0 of 43 reports involved a crash and 4 people were hurt. Owners who file are the ones who had a bad experience, and nobody checks their reports. If the problem affects steering, braking, power or a fire risk, treat it as a safety fault and have it inspected before a long or high-speed drive.
File your own report with NHTSA. Complaint counts are how a problem gets an investigation. How reports land on this sheet.
Guide Paid for this repair before a recall covered it? How recall reimbursement works
Other problems on this car
- Engine failure, knocking or rod bearing 43 reports
- Check engine light or misfire 39 reports