Master Cylinder Cap Identification
 

I believe the wording on this cap "USE DELCO BRAKE FLUID" / "SERVICE WITH DELCO PARTS" was use in 1967 and 1968 but I am not 100% sure. Can you help me with the years and car models this cap was used. Thank you.

----That's the cap that is on my 19,000 original mile 67!....Bill S

Any other models or years this master cylinder cap was used on besides Bill's 1967.

My 3/13/1968 Z/28 has the same lid......Joe

Jan '67 Corvette, Jan and April '67 disc brake Chevelle's same cap here

I believe that is correct for both 67 &68. The SAE script J1703 began after Dec of 68 in the 69 model year.

Here's a quote from Kurt S from CRG;

Both have: Service With Delco Parts

Version 1 has: Use Delco Brake Fluid
67 & 68 cars &
11D
12B
01C
03B

Version 2 has: Use Delco SAE J1703 Brake Fluid
01C
03E
07A
09D
09C

So apparently there was a transition in mid-69 when both were used.

Curious what the early built 67's used prior to 11D

Close, but not just ’67–’68.
That Delco cap shows up across ’67 - early ’70s GM cars (Camaro, Chevelle, Nova, etc.), so it’s not year-specifi.