1999 GMC Sierra Service Brakes, Hydraulic Problems

NHTSA component category: SERVICE BRAKES, HYDRAULIC · data through 07/12/2026

29Service Brakes, Hydraulic complaints

4.8%Of all 600 complaints

#3Most-reported category

Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.

How service brakes, hydraulic ranks on this vehicle

SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP197 · 32.8%

SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE33 · 5.5%

SERVICE BRAKES, HYDRAULIC29 · 4.8%

SERVICE BRAKES25 · 4.2%

STRUCTURE:BODY:TAILGATE:HINGE AND ATTACHMENTS21 · 3.5%

Share of the 600 complaints citing each category; one complaint can cite several. Full breakdown on the 1999 GMC Sierra overview page.

What owners report

“BRAKE PEDAL GOES TO THE FLOOR WHEN BRAKING RESULTING IN EXTENDED STOPPING DISTANCE. NLM”NHTSA complaint 546538 — filed 06/06/1999

Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.

Service Brakes, Hydraulic complaints by year filed

Frequently asked questions

Does the 1999 GMC Sierra have service brakes, hydraulic problems?

Service Brakes, Hydraulic is the #3 most-reported problem area on the 1999 GMC Sierra: 29 of 600 complaints on file (4.8%). Complaints are unverified owner reports, not confirmed defects.

How many complaints does the 1999 GMC Sierra have in total?

600 complaints were on file with NHTSA as of 07/12/2026. Across all categories, 51 involved a crash, 2 involved a fire, 31 reported injuries, and 1 reported deaths.

What does NHTSA's service brakes, hydraulic category include?

NHTSA assigns each complaint to standard component categories; this page reports the SERVICE BRAKES, HYDRAULIC category exactly as NHTSA defines and records it.

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.