Diagsheet

2021 Chevrolet Blazer · symptom sheet

Engine stalls or loses power while driving

  • 25owner reports
  • 42,000median miles
  • $1,800median quote
  • 0involved a crash

Newest report Sep 17, 2026 · checked Sep 19, 2026

91 of the 133 complaints on this car are about the electrical system. 25 of those describe stalling, which makes it the most reported problem on the 2021 Blazer.

Tick what matches of 25 reports

8
2
14
4
5
1

What got replaced

Owners who name the part that was replaced mention the fuel pump (5 reports) and the battery (4 reports).

Recalls and investigations

No recall on the electrical system covers the 2021 model year as of Sep 19, 2026.

NHTSA investigations into the electrical system on the Blazer

PE99-021opened Mar 5, 1999
Transmission and drivetrain · model years 1996

Upper control arm ball joint breakage. Closed jul 30, 1999.

NHTSA summary
AN UPPER CONTROL ARM BALL JOINT FAILS, RESULTING IN THE FRONT SUSPENSION COLLAPSING ON THE FAILED SIDE.
EA94-029opened Jul 29, 1994
Engine And Engine Cooling · model years 1989 to 1993

Engine compartment fires. Closed jul 31, 1996.

NHTSA summary
AN ALLEGED MALFUNCTION IN THE ATLERNATOR RESULTING IN ENGINE COMPARTMET FIRES.
PE94-050opened Jun 27, 1994
Electrical · model years 1989

Fire in dash/instrum.clstr. Closed sep 14, 1994.

NHTSA summary
There is no summary currently available
PE87-003opened Oct 27, 1986
Electrical · model years 1983 to 1984

Elect. failures/fires. Closed jul 16, 1987.

NHTSA summary
SUMMARY OF INFORMATION FROM THE MANUFACTURER: FORD HAS SUBMITTED 40 OWNERCOMPLAINTS WHICH ALLEGE IN-DASH FIRES. IT DOES NOT BELIEVE THAT THECOMPLAINTS INDICATE A DEFECT NOR ARE THEY SAFETY RELATED.ANALYSIS:A REVIEW OF THE COMPLAINTS WAS CONDUCTED.VARIOUS COMPONENTSWERE ALLEGED TO HAVE BEEN THE SOURCE OF THE FIRES.THE FAN MOTOR, BLOWERRESISTOR, WIRING, INSULATION, AND THE A/C CONTROL MODULE HAVE BEEN REPORTEDAS DEFECTIVE.THERE IS NO PATTERN OF DEFECT.NO REPORTED INJURIESSTATUS:CLOSED 6/30/87.======

None of these investigations covers the 2021 model year.

What owners paid

6 of the 25 reports quote a price. Each dot is one quote. The middle half runs $700 to $2,000.

$700$1,800$2,000
$0k$2k$4k$6k$8k

When it happens

The middle half of failures fell between 14,000 and 68,400 miles, from the 9 reports that gave a mileage.

121
122
223
424
1225
526

What owners wrote

“Driving along vehicle shut down in middle of road replace fuel pump, fuel module control in August 2025. Now both top and bottom fuel hose needs replacing. On Nov 2025 I smelled gas and vehicle shut down”

Filed Dec 3, 2025

“I was driving down 776 (a busy highway)Blazer completely shut off, so scary almost got hit by a semi, I don’t know how he managed to get around me , I jumped out of car! Sure thought it was my day to die! Called police for help! Had it towed home then to garage , was told it was the electrical fuel modular! Haven’t slept right in 3 days ! I’m still so shaken up!”

Filed Sep 3, 2025

“The temp gage stays on cool. Ac does not work and the radiator fan stays on after car shuts off. Dealership finds nothing wrong.”

Filed May 4, 2025

Should you keep driving it?

This page can't tell you that. 0 of 25 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.