Built from official NHTSA complaint and recall data · data through 07/12/2026
High complaint levelIts most-reported problem — Service Brakes, Hydraulic — runs 8.6× the fleet median for that category across the 2075 model-years tracked on this site.
158Complaints
4Recalls
9Crashes
0Fires
4Injured
0Deaths
Source: U.S. NHTSA complaint & recall data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.
Is this problem acknowledged?
The most-reported problem — Service Brakes, Hydraulic (23.4% of complaints) — recall and investigation status for this vehicle is currently unavailable.
Service Brakes, Hydraulic complaints here are 8.6× the median for that category across the 2075 model-years tracked on this site.
Complaint category
Reports
Official status
Reference
Service Brakes, Hydraulic
37 · 23.4%
not available
—
Service Brakes
30 · 19%
not available
—
Service Brakes, Hydraulic:antilock/traction Control/electronic Limited Slip
14 · 8.9%
not available
—
Service Brakes, Hydraulic:foundation Components:hoses, Lines/piping, And Fittings
14 · 8.9%
not available
—
Seats
10 · 6.3%
not available
—
Service Brakes, Hydraulic:antilock/traction Control/electronic Limited Slip:control Unit/module
6 · 3.8%
not available
—
Recalled = an NHTSA safety recall covers this category, so a free repair exists. Under investigation = NHTSA has an open probe but no recall yet. Investigation closed = NHTSA examined it and closed the probe — this is not a defect finding; where a closed probe led to a recall we name the campaign. Not available = recall or investigation data could not be confirmed for this vehicle — it is not a “no”. Categories are matched by NHTSA's top-level component. Check your VIN at nhtsa.gov/recalls.
SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP14 · 8.9%
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:HOSES, LINES/PIPING, AND FITTINGS14 · 8.9%
SEATS10 · 6.3%
SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE6 · 3.8%
ELECTRICAL SYSTEM6 · 3.8%
STRUCTURE:BODY6 · 3.8%
Unspecified / other6 · 3.8%
SUSPENSION4 · 2.5%
Percentages are the share of the 158 complaints citing each component; one complaint can cite several components. “Unspecified / other” is NHTSA’s own catch-all category — we show it rather than hide it.
IN THE EVENT OF A VEHICLE CRASH, THE RIGHT FRONT PASSENGER RESTRAINT SYSTEMS MAY NOT MEET THE NECK EXTENSION REQUIREMENTS. Recall repairs are free at authorized dealers.
PARK-IT: NO · PARK-OUTSIDE: NO · OVER-THE-AIR FIX: NO
THIS CONDITION MAY CAUSE AN INADEQUATE SEAL AT THE CONNECTION, POTENTIALLY LEADING TO A FUEL LEAK. IN THE PRESENCE OF AN IGNITION SOURCE, A FIRE COULD OCCUR. Recall repairs are free at authorized dealers.
PARK-IT: NO · PARK-OUTSIDE: NO · OVER-THE-AIR FIX: NO
WHEEL SEPARATION CAN RESULT IN A VEHICLE CRASH. Recall repairs are free at authorized dealers.
PARK-IT: NO · PARK-OUTSIDE: NO · OVER-THE-AIR FIX: NO
Park itPark outside Specimen badges — shown on a recall card only when NHTSA sets the flag. None of the campaigns above carries either flag. Always check your own vehicle by VIN at nhtsa.gov/recalls.
What owners report
“UPON LEAVING MY DRIVEWAY TO THE FIRST INTERSECTION THE BRAKE PEDAL WENT ALL THE WAY TO THE FLOORBOARD. I GOT THE TRUCK HOME AND PARKED…”NHTSA complaint 10455298 — filed 04/15/2012 · SERVICE BRAKES, HYDRAULIC
“BRAKES FAILED AS I WAS JUST LEAVING THE FRONT OF MY HOUSE , TOW TO GARAGE $65.00 INSTALLED ALL NEW BRAKE LINES FROM MASTER CYLINDER…”NHTSA complaint 10442335 — filed 01/04/2012 · SERVICE BRAKES, HYDRAULIC
“I WAS DRIVING ABOUT 35MPH AND I WAS COMING TO A RED LIGHT SO I PUT ON THE BRAKES AND I HEARD A POP AND…”NHTSA complaint 10438568 — filed 12/05/2011 · SERVICE BRAKES, HYDRAULIC
Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.
Complaint trend by year filed
Frequently asked questions
What are the most common problems with the 1999 GMC Sierra 1500?
Service brakes, hydraulic issues are the most-reported category, cited in 37 of 158 NHTSA complaints (23.4%), followed by service brakes (30), service brakes, hydraulic:antilock/traction control/electronic limited slip (14), service brakes, hydraulic:foundation components:hoses, lines/piping, and fittings (14). Complaints are unverified owner reports.
How many complaints does the 1999 GMC Sierra 1500 have?
158 complaints were on file with NHTSA as of 07/12/2026. Of those, 9 involved a crash, 0 involved a fire, and 4 reported injuries. No deaths were reported.
Does the 1999 GMC Sierra 1500 have any recalls?
Yes — 4 NHTSA safety recall campaigns, including campaign 00V122000. Recall repairs are free at authorized dealers. Check your specific vehicle by VIN at nhtsa.gov/recalls.
Has NHTSA acted on the 1999 GMC Sierra 1500's reported problems?
Recall or investigation data is partly unavailable for this vehicle right now — check your VIN at nhtsa.gov/recalls for the authoritative answer.
Is a complaint proof of a defect?
No. Complaints are reports submitted by consumers to NHTSA. NHTSA does not verify individual complaints, and a complaint is not proof that a defect exists.
About this data — Complaint figures on this page are consumer reports submitted to the National Highway Traffic Safety Administration (NHTSA), a U.S. government agency. NHTSA does not verify individual complaints; a complaint is not proof that a defect exists, and counts reflect what owners chose to report, not confirmed failure rates. Recall information comes from official NHTSA safety recall campaigns; recall repairs are free at authorized dealers. Always check your specific vehicle by VIN at nhtsa.gov/recalls. CarModelProblems.com is an independent site and is not affiliated with NHTSA or any vehicle manufacturer. Data through 07/12/2026.
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