Brake Powermaster Unit

[thomas g. warner]

While at the recent Kingston, Canada Rally of the GMC Heritage Cruisers I
saw several coaches with Powermaster brake units installed. The owners of
the coaches were high on praise for the units and the tremendous stopping
power of the add on. I was told that they can still be bought at NAPA.

My GMC Motorhomes International Newsletter parts Interchange Index lists the
Power Master Unit as a GMC part # 18018236. It also says they were used on
GM cars 1985-1986(see #34, page 4). I do not have this #34 reference. does
anybody know what GM cars used them???

 

[bartz paul]

If you go to your local GM parts department, they can look up the part
number and even print out all the applications for you.

Paul Bartz

> -----Original Message-----
> From: CHill113 [SMTP:CHill113]
> Sent: Wednesday, June 03, 1998 8:56 PM
> To: gmcmotorhome
> Subject: Re: GMC: Brake Powermaster Unit
>
> Yes, I believe it was the large Buick, Oldsmobile, and possibly
> Pontiac station wagons, around 1985. I have had the powermaster for a
> number of years.
>
> My first one was from a salvage yard.
>
> If you go this route, be sure to replace the accumulator and the
> pressure switch (use the gray pressure switch). Eventually this unit
> developed an internal pressure leak and would 'short cycle'. I'm not
> much at fixing things, so I bought a new unit from GM.
>
> You will need to buy an adapter plate to use where it fastens on to
> the firewall. (Unless someone has devised another way) Marvin Peck,
> 8019 Colgate, Houston, TX 77061 phone 713-643-4442. designed and sells
> the adapters. As I recall the cost is not out of line.
>
> Justin