This Part Compatible For 1981-1986 Chevrolet C10 C20 K10 K20 Suburban; C20 K20 Pickup; For 1987-1988 Chevrolet R10 R20 V10 V20 Suburban; R20 Pickup; 1987 V20 Pickup; For 1989-1991 Chevrolet R1500 R2500 V1500 V2500 Suburban; 1989 R2500 Pickup
This Part Compatible For 1981-1986 GMC C1500 C2500 K1500 K2500 Suburban; C2500 K2500 Pickup; For 1987-1991 GMC R1500 R2500 V1500 V2500 Suburban; 1987-1989 R2500 Pickup; 1987 V2500 Pickup
Product Remark: with Brake Code JB7 (Brake Codes are on the "Service Parts Identification" Sticker)
Symptoms of a Failing Power Brake Booster: 1. Stiff brake pedal that is extremely hard to push; 2. Longer stopping distance; 3. Engine stalls when brakes are applied