The 1970 GMC S4500 has 1 NHTSA recall campaign affecting an estimated 21,000 vehicles. Recall repairs are always free at any authorized dealer. Last updated July 5, 2026.
POSSIBILITY THAT COVER ON DUAL HY- DRAULIC BRAKE MASTER CYLINDER MAY BECOMEDISTORTED DUE TO EXCESSIVE TIGHTENING OF ATTACHMENT BOLT.IF THIS CONDITIONEXISTS, BRAKE FLUID MAY LEAK FROM UNDER COVER AND EXCESSIVE LOSS OF BRAKE FLUIDCOULD RESULT IN REDUCED BRAKE EFFICIENCY.(CORRECT BY REPLACING WITH NEWIMPROVED TYPE COVER.)
Recall, complaint, and investigation records from official NHTSA datasets (FLAT_RCL, FLAT_CMPL, FLAT_INV), synced weekly. Counts reflect NHTSA records for the 1970 GMC S4500 as of July 5, 2026. Complaint narratives are consumer-submitted and unverified. This page contains ads and affiliate links. Full methodology.