[bigblockv6]

The V6 was dropped in the light duty series in March of 1969 period! So you can forget about any fantasies of a COPO V6 from 1970-72, from that point on it was a dealer installed option, As of 1970 GMC light duty trucks were no longer assembled at GMC's Pontiac Michigan plant rather just GM assembly plants, Suburban's and Jimmy's came of Chevrolet assembly lines. GMC's Suburban models starting in 1967 came only available with the ubiquitous small block Chivy V8 and inline six. The GMC dealer in San Francisco where we got our 68 had a 67 K series Suburban in the showroom that was converted over to the V6, this was back in November 1967.