SPORADIC BRAKE FAILURE "LOCK UP" UPON SUDDEN BRAKING
1999 GMC Z-71
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
Compare all Z-71 years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
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: 5 of 11 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.
- Service Brakes, Hydraulic. Review the 4 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Parking Brake. Review the 2 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Visibility. Review the 2 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
4 reportsWHILE BRAKING THE ANTILOCK BRAKES FAILED AND CAUSED EXTENDED STOPPING DISTANCES. THE CONSUMER PULLED THE VEHICLE OVER AND REMOVED THE ANTI LOCK BRAKE FUSE IN ORDER FOR THE ANTI LOCK BRAKES TO WORK PROPERLY. THE DEALERSHIP WAS NOTIFIED BUT THE PROBLEM WAS NOT RESOLVED. *NLM
THE ABS CONTROL UNIT WILL NOT STOP RUNNING.*AK
BRAKES PULSATE AND MAKE A GRINDING NOISE WHEN APPLIED. MANY TIMES TAKEN IN FOR SERVICE, BUT RUST WAS NEVER DETECTED. WHEEL SHOULD HAVE BEEN PULLED OFF EACH TIME. CONSUMER WAS TAKING ACITON WITH MANUFACTURER. PLEAS ADD VIN. *AK
Official recalls
0No 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
0No exact-year investigations in this snapshot.
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