POSSIBILITY THAT AN IMPROPERLY SPOT WELDED POWER BRAKE BOOSTER DIAPHRAGM PLATE COULD RESULT IN A SEPARATION OF THE DIAPHRAGM FORM THE PLATE.THIS CONDITION COULD CAUSE A LOSS OF POWER ASSIST WHEN BRAKING, RESULTING IN HIGHER THAN NORMAL BRAKE PEDAL EFFORT.(INSTALL A NEW DIAPHRAGM PLATE ASSEMBLY.)
1967 GMC Em4500 Recalls
The 1967 GMC Em4500 has 2 NHTSA recall campaigns affecting an estimated 4,656 vehicles. Recall repairs are always free at any authorized dealer. Last updated July 5, 2026.
Recall campaigns
POSSIBILITY THAT AN INCORRECT MASTER CYLINDER ASSEMBLY WAS INSTALLED IN THE BRAKE SYSTEM.AS A RESULT, EXCESSIVELY HIGH BRAKE PEDAL EFFORT MAY BE REQUIRED TO OBTAIN A SATISFACTORY STOPPING DISTANCE.(REPLACE BRAKE MASTER CYLINDER WITH IMPROVED DESIGN.)
Recall, complaint, and investigation records from official NHTSA datasets (FLAT_RCL, FLAT_CMPL, FLAT_INV), synced weekly. Counts reflect NHTSA records for the 1967 GMC Em4500 as of July 5, 2026. Complaint narratives are consumer-submitted and unverified. This page contains ads and affiliate links. Full methodology.