Determine what truck model

[Bucket of bolts]

Hi I've got a 1971 GMC truck, from looking at vin number I have been able to decode conventional cab,V8,Fleetside.How do you determine model or series such as Sierra etc. Thanks for looking and input.

[mcbassin]

Originally Posted by Bucket of bolts

Hi I've got a 1971 GMC truck, from looking at vin number I have been able to decode conventional cab,V8,Fleetside.How do you determine model or series such as Sierra etc. Thanks for looking and input.

I'm not sure if you can get the trim or model from the VIN.
have you looked at THIS?

[bigdog55]

GMC vin numbers are different from the chevy vin numbers. I have seen the gmc version here on the board.

[SS Tim]

The GMC VIN breaks down to the basics (just like a Chevy), chassis type (4x4 or 4x2), engine (L6, V6 or V8), series (1500, 2500 or 3500), general bodystyle, model year, assembly plant and unit serial number. It won't tell you the specific model, wheelbase, transmission, actual engine or trim level.
* VIN/Model Decoders

[special-K]

I take it you don't have a SPID to read on the glovebox door. Does it have the original seat? The build sheet may be stuck in the springs. Tell us what the truck has and we can probably get you close. Does it have a headliner? If it does, it's a Cheyenne or Cheyenne Super. If it doesn't have a headliner, but has chrome window trim, vinyl door panels, deluxe dash knobs, it's a Custom Deluxe. All the above had at least lower side trim and trim around the tail lights. If it has black vent windows and no other window trim it's a Custom

[Bucket of bolts]

Thanks for replies,have no spid .Gmc codes seem different then chev.It has no headliner and metal door panels.No Crome trim. All I can get from vin is 350 long box Fleetside . How do you know where a gmc was built or option pkg.Dash has knobs and cig lighter . Thanks for looking and advice

[kwhauck]

I've had the same problem as I've got at least three different trucks from what I've determined so far. The glovebox was definitely from another vehicle on mine. As well as on the drivers door the sticker from the same vehicle as the glovebox was taken and glued on.

[SS Tim]

Originally Posted by Bucket of bolts

Thanks for replies,have no spid .Gmc codes seem different then chev.It has no headliner and metal door panels.No Crome trim. All I can get from vin is 350 long box Fleetside . How do you know where a gmc was built or option pkg.Dash has knobs and cig lighter . Thanks for looking and advice

Assembly plant is noted in the VIN see post #4.
The "E" in the VIN simply denotes a V8 engine, it could just as easily be 307, 350 or a 400 (402) baed on the VIN alone.
as far as model goes it sounds like you have a basic "Custom" trim level. The only place to confirm that would be the SPID or a build sheet. Without either you need to do the detective work and make a best guess. Does it have fender or bed emblems?

[SS Tim]

Originally Posted by kwhauck

I've had the same problem as I've got at least three different trucks from what I've determined so far. The glovebox was definitely from another vehicle on mine. As well as on the drivers door the sticker from the same vehicle as the glovebox was taken and glued on.

Are you sure? Check the frame VIN number first. A lot of GMC trucks had color keyed glove box doors that did not match the interior paint but generally the trim instead. If the door post plate has be changed from another vehicle you likely have problems. In the US its illegal to swap data plates.

[kwhauck]

Originally Posted by SS Tim

Are you sure? Check the frame VIN number first. A lot of GMC trucks had color keyed glove box doors that did not match the interior paint but generally the trim instead. If the door post plate has be changed from another vehicle you likely have problems. In the US its illegal to swap data plates.

I'm a new owner, everything was done from previous owners as far as that is concerned. I will have to check what you have mentioned. Where would the frame vin be located at?

Thank you for your response.

[Bucket of bolts]

I've been hijacked Lol

[kwhauck]

Originally Posted by Bucket of bolts

I've been hijacked Lol

Sorry!

[70']

Look behind and under your seat, you may find the original build sheet. That's where I found mine, stuffed in the metal spring frames of the seat bottom. That will tell you everything you want to know......if it's still there.