3 character GM chassis (suspension?) codes

[NOSOK]

Adding parts to my rockauto cart to refresh my suspension and noticed a lot of the products have fitment descriptions with 3 character alpha-numerics like "6tb,7tb,6tf,... etc".

Are these RPO codes? They don't seem familiar and nothing comes up when I plug them into an RPO decoder.

 

[Fless]

Yes, they're RPO codes.

 

[gooffeyguy]

Yes, they are listed at the end of your RPO sticker in the glove box. They represent spring codes

 

[NOSOK]

Thanks. I should've searched the full RPO list I have but I was getting conflicting results on google.

 

[Sparksalot]

Thanks. I should've searched the full RPO list I have but I was getting conflicting results on google.

Beware, the full list is very very long.

 

[NOSOK]

Beware, the full list is very very long.

Yeah I just pasted them into google sheets so I could search them easier/lookup my own RPO codes. 14k total (with some duplicates), probably why they didn't show readily before.

I thought it'd be more helpful to know all my RPO codes, but it doesn't seem to be the case [yet]. For example I have YD5 and YD6 spring codes, but I can't find matching products for those codes on the parts sites.

 

[Sparksalot]

Yeah I just pasted them into google sheets so I could search them easier/lookup my own RPO codes. 14k total (with some duplicates), probably why they didn't show readily before.

I thought it'd be more helpful to know all my RPO codes, but it doesn't seem to be the case [yet]. For example I have YD5 and YD6 spring codes, but I can't find matching products for those codes on the parts sites.

I ended up doing the customer service thing with chevy to decode both of mine. Some of the codes have been helpful to cross reference, but I haven't really found a direct look up on most.

 

[Joseph Garcia]

Get an RPO code listing for your year and model of your truck, and that will cut the list down to a more manageable size. I cannot remember where I obtained mine, but it was probably at a GM web site. I've attached mine, so that you can see what it looks like.