[special-K]

All C/30s and C3500s came with leaf springs. Coil springs were not offered on the 1Ts.

All Longhorns, C/20, C2500, C/30, and C3500 were built on the C/30-C3500 133" SRW Chassis.

Only C/30-C3500s came in 133" WB. That is the 1T shortbed frame with 157" being the longbed.

You will not find Coil Springs listed on any light truck SPID in 67-72. But GMCs came through with Lweaf Springs unless Coil Springs were opted. It just goes to prove you can't rely soley upon the printed word. Why was it done this way? Couldn't tell you and I'm not sure anyone can. Ask them why the 402 is listed as a 396 the second year after they were no longer used. Ask them why Sierra Grande is on many Sierra SPIDS. And ask them why options included in a trim level are listed as if they were an independent option. Hetaers came standard in all trucks. You will not find the heater listed as an option on any trucks. But we know it could be deleted.

For what ever reason the US-built GMCs have the Leaf Springs listed as an option and when they have Coils they are not shown as an options. In reality those trucks are Leaf Spring delete, so no spring option listed.

Now with Canadian built light trucks, C910-C930, it is another matter. Those truly were same as Chevrolet except the GMC grille and markings, such as emblems, tailgate, and horn button... same as post '72 US-builts. What I am saying is Canadian 67-69 910-930s were not offered with the V6 option or any other drivetrain feature only found in GMCs built in the USA. I believe someone will be here showing their Canadian ordering books for GMC stating Coil Springs are standard. Yup, that's because those are actually Chevrolet spec'd GMCs, not the true GMCs such as built in USA