Blackwall Tires, 6.70x15 nylon cord

Years 1963–79 Models 3 Factory citations 2

Also described as G70-14B G/B Red StripeBlackwall Tires 6.70x15, nylon cordBlackwall Tires, nylon cord6.70 X 15 4 ply blackwall nylon

Documented applications

Chevelle / El Camino

1970 Confirmed

Corvette (C1 / C2)

1963 Factory-verified

$15.70; 412 built

GM Heritage factory kit — 1963 Chevrolet Corvette, p.8.
1964 Factory-verified

$15.70; 372 built

GM Heritage factory kit — 1964 Chevrolet Corvette, p.17.
1965 Confirmed

$15.70; 168 built; size disputed: CAC lists 6.70x15, CorvetteStory/CorvSport list 7.75x15 (7.75x15 was the 1965 spec)

Impala / Full-Size

1963–70s (varies) Confirmed

tubeless

This page aggregates every documented appearance of P91 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.