Factory brake booster equipment

[402Bowtie]

Is there any scenario a 67-72 truck would have a factory brake booster without listing the J70 RPO code for brake booster equipment? In other words, if J70 is not listed on the SPID, is it safe to assume the truck did not come with factory brake booster? Are there 71-72 models with manual disc brakes?

[Bigdav160]

My '72 came with power brakes and there is no call out on the spid for power assist

[specialtyretail]

Our 72 is manual disc brakes. Thanks, Fred.

[FirstOwner69]

My '69 CST was built without power brakes. When I bought the truck new, part of the deal was that the dealer install power brakes. The installation looks like what the factory was installing.

[weim55]

I'm certain 71/72 half tons all come standard with manual disc brakes and I've owned a few that were equipped as such. Since you bring it up I'm wondering if the larger trucks say a camper special three-quarter ton or a one ton Dually might come with power brakes standard as part of a package?

Steve weim55 Colorado

[FirstOwner69]

Not sure about later years, but my '69 mentioned in post 4 is a 3/4 ton.

[71CHEVYSHORTBED402]

My 71 Custom Deluxe shows J70 (HYDRO BRAKE BOOSTER) on the SPID, but my 72 Super doesn't, which doesn't strike me unusual for a Super, it probably falls under "YE9". Odds are it's on the Super's build sheet, but I have to remove the seat to see it.

[402Bowtie]

Originally Posted by specialtyretail

Our 72 is manual disc brakes. Thanks, Fred.

That settles that. Thanks Fred!

Originally Posted by Bigdav160

My '72 came with power brakes and there is no call out on the spid for power assist

Originally Posted by FirstOwner69

My '69 CST was built without power brakes. When I bought the truck new, part of the deal was that the dealer install power brakes. The installation looks like what the factory was installing.

These two comments are interesting. I asked the question because I was interested in buying a '72 C20 Cheyenne Super today. The owner said it had power brakes, but when I looked at the SPID, there was no mention of RPO J70. However, after viewing the truck in person, it appears to have a stock booster in place.

Originally Posted by weim55

I'm certain 71/72 half tons all come standard with manual disc brakes and I've owned a few that were equipped as such. Since you bring it up I'm wondering if the larger trucks say a camper special three-quarter ton or a one ton Dually might come with power brakes standard as part of a package?

Steve weim55 Colorado

Yeah, perhaps. I'm wondering the same. EDIT: Turns out you were correct Steve....see post #9.

Originally Posted by 71CHEVYSHORTBED402

My 71 Custom Deluxe shows J70 (HYDRO BRAKE BOOSTER) on the SPID, but my 72 Super doesn't, which doesn't strike me unusual for a Super, it probably falls under "YE9". Odds are it's on the Super's build sheet, but I have to remove the seat to see it.

Are you saying your '72 super has the brake booster but no J70 code?



So I ended up buying the truck. Besides the brake booster oddity...there are two other things that seem odd:
1) The "SUPER" fender emblems are mounted above the Cheyenne emblems. I would normally think this is a PO hackjob, but I'm not sure...the fenders (and actually the entire truck) appear original--paint and all. YE9 is Cheyenne Super equipment is listed on the SPID. And glovebox VIN matches door jamb VIN with rosette rivets.
2) It also has dual horns, but no indication of RPO U08 for dual horns. I need to take a closer look to see if they are mounted in stock locations, but I think they were at first glance.

Once I get the truck home in the next week or so, I will post some pics. Here is a (poor) pic of the SPID, with the options cut off listed below.

A11 tinted glass
F60 HD front spring
G60 Auxiliary Spring EQ
M20 4spd trans
VF1 Chrome Bumper-Rear
YE9 Cheyenne super

[FirstOwner69]

Upon further review... the Vehicle Information Kits for 1971s and 1972s on the GM Heritage Center website indicate that power brakes were included on C-20s and C-30s and optional on C-10s.

[402Bowtie]

Originally Posted by FirstOwner69

Upon further review... the Vehicle Information Kits for 1971s and 1972s on the GM Heritage Center website indicate that power brakes were included on C-20s and C-30s and optional on C-10s.

I learned something new today! Thank you for sharing that!

[FirstOwner69]

Originally Posted by 402Bowtie

I learned something new today!

So did I!!!

[402Bowtie]

Originally Posted by 71CHEVYSHORTBED402

My 71 Custom Deluxe shows J70 (HYDRO BRAKE BOOSTER) on the SPID, but my 72 Super doesn't, which doesn't strike me unusual for a Super, it probably falls under "YE9". Odds are it's on the Super's build sheet, but I have to remove the seat to see it.

Is your '72 a C20 or C30? ....which would match up with FirstOwner69's info in post #9.

[71CHEVYSHORTBED402]

Originally Posted by 402Bowtie

I learned something new today! Thank you for sharing that!

Very cool, power brakes on a C10 is an option. To answer your question above, Yes, my 72 C-20 Super does not show J70 on the SPID.