← New search

1991 GMC B6 Medium Duty

Owner reports · Recalls · Investigations

Limited comparison data

There is not enough comparable history to draw a useful model-year comparison.

About this comparison →

How this year compares

Owner complaints by model year

Other model years Selected year
Compare all B6 Medium Duty years →

Counts vary with age, sales and reporting. They are not failure rates.

What owners reported most

Tap a category to read its complaints. One report may name several components.

When problems were reported

Mileage at the reported incident

Limited mileage data: 0 of 1 reports include usable mileage. There isn’t enough coverage to show a useful chart.

NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.

What to inspect

Issues worth paying extra attention to based on owner reports.

  • Engine And Engine Cooling. Review the 1 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

0 crash reports0 fire reports0 injury reports

What owners actually said

1 reports
Mileage unknown · Apr 9, 2003
Engine And Engine Cooling

THE VEHICLE EXPERIENCED ENGINE FAILURE FOR THE SECOND TIME. HE STATED THAT THE FIRST TIME WAS 11/99. THE ENGINE HAD 118,000 MILES. HE STATES HE ASKED THE MANUFACTURER FOR ASSISTANCE AND THEY DECLINED BECAUSE OF A TECHNICALITY. HE ALSO STATED THAT THE MANUFACTURE SHOULD REPLACE HIS ENGINE BECAUSE HE SAID THAT WHEN HIS ORIGINAL…

Read full complaint

THE VEHICLE EXPERIENCED ENGINE FAILURE FOR THE SECOND TIME. HE STATED THAT THE FIRST TIME WAS 11/99. THE ENGINE HAD 118,000 MILES. HE STATES HE ASKED THE MANUFACTURER FOR ASSISTANCE AND THEY DECLINED BECAUSE OF A TECHNICALITY. HE ALSO STATED THAT THE MANUFACTURE SHOULD REPLACE HIS ENGINE BECAUSE HE SAID THAT WHEN HIS ORIGINAL ENGINE WAS REPLACE THE MECHANIC USED PARTS FROM THE OLD ENGINE. *NLM

NHTSA ODI #10015551

Official recalls

0

No recalls in this snapshot.

Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗

NHTSA investigations

0

No exact-year investigations in this snapshot.