2021 Chevrolet Suburban · symptom sheet
Check engine light or misfire
- 39owner reports
- 62,000median miles
- $14,000median quote
- 0involved a crash
Newest report Sep 23, 2026 · checked Oct 2, 2026
132 of the 198 complaints on this car are about the engine. 39 of those describe misfire.
Tick what matches of 39 reports
Misfire on other Suburban years
No other Suburban model year has enough reports of misfire for a sheet of its own. See every Suburban year.
What this problem usually is
These reports start with the check engine light. Many describe the engine running rough or shaking at idle, a P0300-series code, or a catalytic converter code. A worrying number say the light was flashing. Owners often list ignition coils or spark plugs already replaced, and the light coming back afterward.
What got replaced
Few of these reports name the part that was replaced.
Recalls and investigations
2 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 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
5 of the 39 reports quote a price. Each dot is one quote. The middle half runs $12,000 to $14,000.
When it happens
The middle half of failures fell between 36,126 and 111,000 miles, from the 16 reports that gave a mileage.
Is this a known problem?
The manufacturer has sent NHTSA 27 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.
Certain vehicles may have a condition that could cause the cylinder 2 glow plug to fail. If this failure occurs, the Malfunction Indicator Light (Check Engine Light) will illuminate and a diagnostic trouble code will set.
Certain vehicles listed above, may have a condition that could cause the engine coolant control valve to fail an onboard vehicle diagnostic test.
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 service bulletin provides repair information for Engine Wire Harness Chafing to correct customer concerns of IPC Gauges Sweep, IPC Warning Message, SES/Check Engine/MIL, No Start/ No Crank, Runs Rough, Stalls, Reduced Engine Power, Various DTCs.
23 more on the 2021 Chevrolet Suburban page.
What owners wrote
“Had to replace entire engine for same reason other GM engines are recalled for, the lifters and shifting cylinders. This should also be covered under a recall! It left me and my kids stranded.”
Filed May 19, 2026
“The check engine and traction control light came on in my car. This was accompanied by a clanking sound, shaking. The panel said â SERVICE ESCâ â service traction controlâ and â forward collision system unavailableâ The Chevrolet light logo on the back of my car will also not turn off occasionally whenever the car is turned off.”
Filed Feb 21, 2026
“Engine light comes on and now flashes. The service traction control and esc comes on. The whole vehicle shakes when idling. Certified GM dealer hooked it up and it says misfiring cylinder 6. All spark plugs replaced, new GM coil, new spark plug wires. Nothing has fixed it yet.”
Filed Sep 4, 2025
“Vehicle lost power, debris in cylinder from internal damage, crank case leaking air, oil leaking into cylinder, P0300, P0308, and P050D”
Filed Jul 7, 2025
Should you keep driving it?
This page can't tell you that. 0 of 39 reports involved a crash. 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 Which lights mean pull over now? Warning lights by color and urgency
Other problems on this car
- Engine stalls or loses power while driving 43 reports
- Engine failure, knocking or rod bearing 43 reports