Bus Collection: 1957 GM 4104, 1948 4151 and 1948 3751 Silversides

Here is my 1957 General Motors Coach (GMC) PD-4104 on the left then a 1948 GM PD-4151 in the center and a 1948 GMC PD 3751 on the right.

We take the 4104 on the longer trips and the two older buses we take to local antique truck and equipment shows. I am currently working on another 3751 that I am modifying to be powered by a Mack engine and using a six speed Allison transmission.

Bus Collection: 1957 GM 4104, 1948 4151 and 1948 3751

I now own five GM silversides in all and have done extensive work and research on the mechanics of this model bus. If anyone would like any information I may have, feel free to contact me.


Here's a video of a restored and running PD-3751 bus with smooth shifting running in the Netherlands:

Below is a video of a very similar restored 1947 version of the venerable PD-4151 Silverside:

Two videos of a similar and well restored General Motors PD 4104 bus:

Two videos of John Leslie's nicely restored and maintained GMC PD-4104 motorhome conversion.

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Your Comments

Don | Jun 24, 2010 | 6:17 pm

I am looking for good sources for parts for my 1969 GMC TDH3301 "Baby Fishbowl". I know it is classified to be a light duty bus and has limited parts interchange with the bigger newlook busses. Anyone have any ideas?

Originally posted on January 29, 2009 12:24:55 AM EST

Henry Markwart | Jun 24, 2010 | 6:17 pm

Great web site. It harkens back to the time when driving silversides was a major part of my livelyhood.

Originally posted on February 24, 2009 10:47:30 PM EST

Mark Chadwell | Jun 24, 2010 | 6:18 pm

Need Mufflers(Dual System) for GM PD4104. Or when to purchase.

Please advise

Originally posted on March 31, 2009 7:09:28 PM EDT

dave Waxon | Jun 24, 2010 | 6:19 pm

I have a 1948 silverside and i am looking for some parts .I am looking for all 4 side marker lights glass lense , front light up dog,and side window weatherstriping .

Originally posted on July 18, 2009 9:33:53 PM EDT

dave Waxon | Jun 24, 2010 | 6:19 pm

call me at 612-701-4213 email me at

Originally posted on July 18, 2009 9:36:19 PM EDT

debbie stegen-peck | Jun 24, 2010 | 6:20 pm

Also have 1948 GMC "STUBBY" bus conversion for sale.

Originally posted on July 22, 2009 1:26:04 PM EDT

debbie stegen-peck | Jun 24, 2010 | 6:21 pm

Would love to have someone else want to buy my yard art. It needs a new home with loving parents. D*

Originally posted on October 6, 2009 8:51:04 PM EDT

d.stegen-peck | Jun 24, 2010 | 6:22 pm

yes, someone should my like bus.......

Originally posted on October 27, 2009 9:47:24 PM EDT

Larry Lyon | Jun 24, 2010 | 6:22 pm

Looking for side windows for 4104. e lefts and 1 right

Originally posted on January 18, 2010 7:46:33 PM EST

Clint Dinkel | Jun 24, 2010 | 6:23 pm

Have a 1952 silverline coast to coast with the detroit deisel but im needing a generator and some other parts for it and cant find them anywere could anyone help me?... i just bought the bus and am needing help to locate parts feel free to call me at (620)212-0375 or E-mail me thank you

Originally posted on March 9, 2010 11:31:46 PM EST

Steve | Jun 24, 2010 | 6:24 pm

I have a 1974 GMC NewLook (Fish bowl) and I am trying to source out a kingpin. Does anyone have any leads on parts?

Originally posted on April 24, 2010 9:24:43 PM EDT

Curtis Taylor | Jun 24, 2010 | 6:25 pm

I would like to know if his GMC 4104 is for sale and how is it on fuel and transportation as far as mechanics and dependability. I lso was wandering if it would be a great chose for a quartet to do a lot of traveling in?

Originally posted on May 11, 2010 4:38:57 PM EDT

Tim | Jun 24, 2010 | 6:26 pm

I would consider selling the 4104. Email me.

Originally posted on May 11, 2010 7:36:03 PM EDT

Kathleen | Aug 03, 2010 | 3:55 pm

I have a 1948 3751 for sale. Bus on the outside, RV on the inside. Sound and ready to roll.

william galloway | Sep 28, 2010 | 5:12 pm

i have a 1958 gm 4104 for sale in side great it runs its the BOS on the elec. short box nead to be replace cell is 605 412 0340 call any time make offer

william galloway | Oct 21, 2010 | 10:57 am

e mail me i still have itmy cell not working or call 308 765 9533 his names norman he will tell me the bus is lic. ins

Pat Robinson | Nov 19, 2010 | 9:40 am

I need a front emblem to a 1947 Silversides. Anyone know where I might find one?

Steven Pettis | Nov 25, 2010 | 8:45 pm

I have a 1960 GM4104 for sale. The tires (11R/22.5) are only about 1year old. The starter and clutch are only about 2 years old (probably less than 100 hours on both). The 671 Detroit engine still runs like it was the first day it ever ran. It has a roof mount RV A/C. New 110 electrical Rv connections and wiring will run off a generator or RV plug or 15a 110v connection. It sports a very comfortable adjustable Air-Ride seat * two 8ft benches *a small eating-sitting *area a paritition wall for a restroom (nothing inside)* 4 bunks* a built-in couch* a birch-wood cabinet (in the back) *and overhead birch-wood cabinets (in the back). RADIATOR NEEDS REPAIR email for info and I will send pics on request

Steven Pettis | Nov 25, 2010 | 8:47 pm


william galloway | Dec 14, 2010 | 2:56 pm

my new cell 308 672 8875

rob | Jan 09, 2011 | 8:28 pm

I would love to be able to afford one of these one day, spend my summers traveling with my wife and daughter. I think the silversides are such incredible pieces of art. thanks for posting this site.

Jesse | Jan 18, 2011 | 4:13 pm

I have a 1948 GM Greyhound PD 4151 Interior was converted to Motor Home - shower, stove, sink, bathroom, refridgerator, bedroom, cabinets etc. It's in pretty good condition, It has been used and the engine ran fine, However, It has been sitting for a while and needs some engine work to get it running again.

Jim | Jan 23, 2011 | 10:42 am

I'm looking for parts for a '59 4104. Rear baggage door, rear electric door and fenderwell body panels. I could make the body panels off of a good side piece if it is dimentionaly correct.

william galloway | Jan 29, 2011 | 9:30 am

people i nead help i have 1958 gmc 4104 the electric box on the side fride the model is 1118416 12volt 160 amp the break lights are not working this bus way donated to me of being homeless and health problems it sat for better 7 yrs i got it to run its tag and inc. i would be geat ful on this help e mail me at

philippe mes | Apr 06, 2011 | 2:14 am

looking for a VERY GOOD silverside
to be exported to europe
exteriour must be 100% original and complete
technicaly VERY GOOD


Leo Plamondon | Jun 14, 2011 | 5:15 pm

Just interested in your buses as I drove courier 50 500 flxible bus with a straight eight motor twin coach prevot .
Small company in Trail BC this was in 1960 Brings back memories I now retired Leo Plamondon

bo wright | Jun 20, 2011 | 5:11 pm

i have a54 gmc 4104 like new and i love it its nice to know there other folks that feels the same way

Richard Vadnais | Jun 28, 2011 | 11:12 am

I have a 1957 GMC 4104 for sale. Best offer... I started to convert. Needs injectors put back in, I was going to test them just didn't yet. It also needs new front glass. I also have a 58 but want one of them to live in (some day). Can call me at 719-689-9023 or e-mail me at ...
Thanks for looking at this, nice site!!!

Andre Apergis | Jun 30, 2011 | 7:40 am

Hi i love all of your buses And i have a bus a 1957grayhound bus i own and i was going to try too nake it look sharp but i have been to sick to work on it and i dont want it to jest sit there if you no someone hoo wants to buy a good runing bus call me or email me ph 727 484 5291 it need tlc but a dam good runing bus

Tom Merchant | Aug 23, 2011 | 2:17 am

I have a 1947 GM 3751 Silversides that I need both windshields for. Does anyone know where I can purchase the two windshields?

Tom Merchant | Aug 23, 2011 | 2:21 am

I have a 1947 GM 3751 Silversides that I need both windshields for. Does anyone know where I can purchase the two windshields? Please send any replies to me at Thanks.

chad | Aug 26, 2011 | 2:05 pm

I have a 1941 pdg 4101 silver side, does any one know of any 40 or 41s still out their? this is # 176 of 224 and i cant fine any others like her,or any info on this one thanks for the help. chad

chad | Aug 26, 2011 | 2:18 pm

any glass for the old buses can be cut by your local glass shop its just laminated safety glass,make a wood or plastic pattern that they can also comes in bronze and grey tint if you need tinted glass this is much better then an applied tint

Bob Gaudette | Sep 02, 2011 | 2:23 pm

I have a 1957 GMC 4104 with a detroit 671. Does any one know where I can find a fan hub insulator. The original is made of hard rubber and slides on the crank shaft and the fan slides on over it. Any help would be appreciated. Thank You.

Bernie | Sep 08, 2011 | 8:04 pm

Hey bus fan
I just got my 1959 PD 4104 and very proud of it, it run and sound realy nice.

I am looking for 2 passenger side cargo door maybe some one know where there is a couple or even one.

Keep Smillling

ROGER SMITH | Sep 29, 2011 | 6:34 pm


Bob Gaudette | Oct 05, 2011 | 2:45 pm

I have a 1957 GMC 4104 with a 671 Detroit.I need a fan hub insulator. It slides on the crank shaft and the fan bolts to it. It absorbs the vibration from the fan.Does anyone have one to sell or do you know if some-one rebuilds them or is there a replacement.

Al Bianco | Oct 31, 2011 | 4:25 pm

Hello !! Well looks like I have a sleeper in my 52 G M PD 4103 ;S/n 1462. It is a great runner with many latest maintenance technologies installed. Amsoil Lubes thru-out,90 Mm Injectors,(prox 213 HP),and 355 Gears,with 4 speed.Also installed engine revitalizer technology,and Fuel Catalyst which gets prox 12.5 MPG,weighs prox 23K#;has metric tires 235R70 Fr.,275R70 rears,(1/2 gear lower for hills),about 8 years old,70% avg.
It's conversion is Hardwood with stainless holding and sleeps 6,and carries up to 16.Storage up top is good,you know lower!!
Breaks my heart to say I cannot fund it any longer,so will offer it to an Ex H D driver who loves to crank a gear once in a while,for a reasonable price.Actually runs smoother than air ride coaches with it's 6 foot springs. I have driven/ compared to MC 5 and MC9,s and it's true.Call for much more specs:559.281.4804

C. Berry Jr. | Dec 23, 2011 | 8:31 pm


Do you still have that 4103 in your possession? I'm very interested!

Send an e-mail with pictures to

C. Berry Jr.

Tim Meeker | Feb 04, 2012 | 11:22 am

Your 4104 in the pic did you buy it in Virginia from The Virginians Quartet . From what I can see from the pic it sure looks like it . They were some friends of ours and I always enjoyed riding that bus. I have a 90 model 15 Eagle and I am just a bus junkie !!!

Tim Meeker | Feb 04, 2012 | 11:26 am

Also I had a few of the glass lens in my building if I can find them you can have them. I am in Florida right now but when I get home I will see if I can find them.
A few marker and a couple clearance lens .

ROGER SMITH | Feb 04, 2012 | 8:28 pm


Tim Meeker | Feb 04, 2012 | 10:14 pm

No I am in Florida till March
I will look for them when I get home

ROGER SMITH | Feb 05, 2012 | 5:53 am


Al Bianco | Feb 08, 2012 | 1:36 pm

Mr C Berry,Jr.
Sent you e-mail just now,and thanks for interest.
Also Need a Drivers side W/shield and some window glass sides and rear.
Has 6500 Gas gen-set running ,needs oil seal.
Remembered this later,bbut doesn't change fact it is a winner for someone who loves to shift a treasure coach of Pleasure.
All the Best, Al B

Al Bianco | Feb 08, 2012 | 1:44 pm

VIFMW Silversides Expert;
Any chance you might know of a Drivers w/Shield for a 4103??
I had a replacement installed by repair shop that broke them,and the next week some jealous person threw a rock at it .But it never complained ,and CHPatrol just shakes head when they see it.Makes it look really classic.
Thanks for help you may have. Need to know for next user. Son;son-in-law;grandson,etc.,buyer,who knows.Thanks again Al B

ROGER SMITH | Feb 08, 2012 | 7:00 pm


ROGER SMITH | Feb 08, 2012 | 7:09 pm


Les Berg | Apr 07, 2012 | 10:40 am

We're looking for a 4104 or 4106 in good mechanical condition. We don't mind unconverted or partially converted as we we'll need it to have bunks for out two kids.

We're looking in the 'inexpensive' range - $3k to $7k and somewhere in the Pacific Northwest, though we're open to other suggestions.

I have a tech question for anyone with the expertise: We're looking at a 4106 where the conversion was started but not completed. THe problem is that the fluted siding around the windows was removed and possibly lost.

If we buy the unit, what gage and type of aluminum should be used to replace it, knowing that it's part of the bus's structure.

Also, we'd need to drive the unit about 600 miles to get it home. Will moving the bus with the siding missing risk damaging the structure of the bus?

lespaulberg{ a t }
208 three/five/three 4877

Al Bianco | Apr 07, 2012 | 11:01 am

Hello Les;
Suggest check for replacement newer style casements (Sliders)for that issue,as easier than locating,and cheaper,quicker. Also 4106 dramatically better than 4104 in all aspects including engine placement and overall better looks. Not an engineer but do not think that windows played any part in structure of chassis. That model is like mine,a 4103,which were classics in their day. Contact me when you need to service the drive train,as I can steer you onto Amsoil's products(at Cost) which will extended the life of your older components. All the best,and Happy Hannuchar /Easter .

Les Berg | Apr 07, 2012 | 11:08 am

not the windows, the _siding_ is missing. Take a look at a picture. Notice the vertical lines where the fluted siding should be - I believe those are the internal wall ribs.

Les Berg | Apr 07, 2012 | 11:12 am

Thanks for the quick reply, Al, I appreciate it. I was kind of shocked when I realized that the siding was missing on that bus. Knowing that it's a monocoque construction and that the exterior skin is a structural component of the bus itself, I'm worried about moving it, or how far it may have already been moved in this condition.

Thanks agan,

Al Bianco | Apr 07, 2012 | 11:19 am

O K see it. What is blanked out white spot? THat coach has a frame structure uni-body ,I'm Sure and probably will not affect structure from upper body.You should think twice before taking chance on finding those parts. A B C Bus in L.A. is source for older G M Coach parts,and they can steer you well,but that labor cost should be a purchase decision.Also see sign that entire drive train will need checking (leaking front wheel seal),unless maint history is avail,with documentation. Any Cancer on it? Best of luck,which is hard work,anyhow !!

Les Berg | Apr 07, 2012 | 11:36 am

yeah, I saw the wheel seal as well. I used to be diesel driveline mechanic, which meant that I worked on everything but the motors. I'm also certified in collision repair and know a bit about metalwork, so I at least know enough to ask the right questions. :)

The large white area is where the conversion was started. The two center windows were removed and covered over with sheet metal. If we buy that bus we'll remove the sheet metal and reinstall the windows, which we know are included. We're just not sure if the siding is still there - we're waiting to hear back from the owner.

My thought was that the missing siding coud be replaced with flat aluminum as long as we used the right type and thickness of aluminum to provide the same structural strength as the original metal.

Al Bianco | Apr 07, 2012 | 11:44 am

Hey, now that I think of it ,I remember seeing that done with flat sheet somewhere at arally,and no question it would be easier and less costly than orig parts. Your exper. should make it easy,but my thought---$4000.!!
Always with good history of suspension and Drive train condition. That could get costly.
You're almost there,I believe. Regards, Big Al "Mr. Filter".By-Pass Oil Filters from Amsoil.100,000 Mile oil Changes with sampling.

Tim | Apr 28, 2012 | 8:35 am

To Tim Meeker I am sorry I did not see your post sooner or I would have responded. Yes I bought the 4104 from Howard McVey in Roanoke Virgina. The bus was used buy the singing group I believe from about 1971 until we bought it in 2004. We still use it every year several times and have had no real problems. It is a very nice bus its just to new for our liking. The Silverside buses are our favorite. Tim

Ed Strong | Aug 02, 2012 | 6:52 am

I recently bought a '53 4104 that was converted some time ago. I would like to remove one of the original windows and replace it with a side panel. Do you know where I might find these side panels? Or if not what is the alternative?

Tim | Aug 02, 2012 | 9:22 am

Hi Ed I am not sure what kind of side panel you are referring to most people just make up a flat panel over the window from sheet metal. There were some fiberglass window covers made at one time but I doubt they are still available. Tim

Rick | Aug 02, 2012 | 2:48 pm

Does anyone know where to find parts for a 1959 4104 GMC Coach? Primarily we are looking for a radiator. Thanks Rick

Tim | Aug 03, 2012 | 7:02 am

Rick try Luke at US Coach. 856-767-4848

Fred Bader | Nov 08, 2012 | 9:42 am

Beautiful Buses Tim!!!!!!!!!!!!

Fred Bader | Feb 08, 2013 | 5:47 pm

Hi Al Bianco, Can you provide me with your contact info? I'd like to ask you some ?'s about Amsoil. Thank you, Fred Bader

richard thomas | Apr 04, 2013 | 7:35 pm

1948 silver side for sale,500 miles on new tires. runs great was converted to a motor home.we have had it for 16 years all orig,on out have all moved out and we only go out 1 or 2 times a year runs great very very dependable, asking 15k,we put news tires and a new frig in 2 years ago 4k worth. need pics i got lots its a sad day for us. we love this bus. its in kearney,ne.i could go on and on and on. she needs a good home some one to love her. thanks alot

Chris Lind | May 02, 2013 | 9:35 pm

I have a Domino DC122 Tourmaster (Australian built) with a 6V92 Detroit and I am looking for a GM POWERED (written in a square with wings either side) front emblem for her. Most USA built coaches had them and they were also added to Aussie built coaches - Can you help?


Chris Lind

Al Bianco | May 03, 2013 | 11:45 am

Hello; Sister has 1965 G M Model MC-5 35' Converted Coach which she lived in full time for some years,and is now putting on Market. It is equipped for full timing,with ample water and battery (solar)storage;is Solid Oak,with Queen bed and sleeper couch. All amenities ,as well. Strong 8V71 ,4 speed Manual Tranny,80% fresh Tires;Air ride ,level adjusters;low time brakes;and Highly polished body. Needs some refreshing detailing,but very sound chassis. Asking $35K OBO. Pixs available. E-mail me for particulars. This is a very rare ,desirable conversion .Thanks for sincere interest.Big Al B.

richard thomas | May 10, 2013 | 6:29 pm

we sold the 48 silver side thanks for all the interest
richard thomas

mark blair | Jun 16, 2013 | 8:02 am

looking for windshield rubber for a 1957 gm 4104pd and trying to see if there I an option to adding power steering ??

wayne miller | Jun 08, 2014 | 11:00 am

I have a 1969 blue bird motor coach was told it belonged to Mel tillis for sell

Dou Roy | Jan 13, 2015 | 9:10 pm

1957 4104 need rubber for baggage door hinges. ?? Thank you and enjoyed all your comments.

Arthur j brinkerhoff | Feb 04, 2015 | 9:39 am

Hey Dou Roy there is a fellow in NewJersey, Luke is his name, 888-262-2434 if he ain't got it, he will probably know where to get it.

James Demer | Mar 16, 2015 | 10:23 am

I am changing the muffler on my 1958 gmc 4101 it looks like the only way to get it out is taking the radiator out and going from there. I would appreciate any suggestions.

Arthur j brinkerhoff | Mar 16, 2015 | 3:48 pm

Hello James, there is a post on bus nuts that you need to look at reflects on the 4104 but there is some info on replacement mufflers, never seen a 4101 but I've herd they used that same muffler on the 6-71 for years. Good luck!

leon | Oct 25, 2015 | 12:53 pm

need voltage regulator for 3751

Sergio Bayarri | Apr 07, 2016 | 1:59 am

I am looking for a 4104 in reasonable condition. If it is in Europe all the better, otherwise we can purchase from US. We are located in southern Spain.