Rear Sport Bumper Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Already Gone** · 11-21-2014, 08:23 PM

I am sending this original ( but very tired ) rear sport bumper for new chrome. There are a couple holes in it that know don't belong and they will be be filled and rechromed. My question is are the holes I have circled in the pics factory holes? They are perfect round and they are on the edge chrome but I cant see a need for them as the bumper mounts with 4 bolts along the centre of the bumper. If they aren't original holes I will get them filled as well.

BKSS67 · 11-21-2014, 08:39 PM

It's a little off topic, but some food for thought....

I'm not sure on the availability of parts in Canada, but it would be cost prohibitive to straighten and re-chrome that bumper here. A good quality repop bumper would be about $250 plus shipping.

Is custom plating and metal work significantly cheaper in Canada?

C/10 King · 11-21-2014, 08:43 PM

Quote:

Originally Posted by Already Gone

I am sending this original ( but very tired ) rear sport bumper for new chrome. There are a couple holes in it that know don't belong and they will be be filled and rechromed. My question is are the holes I have circled in the pics factory holes? They are perfect round and they are on the edge chrome but I cant see a need for them as the bumper mounts with 4 bolts along the centre of the bumper. If they aren't original holes I will get them filled as well.

I don't know the answer, but I've seen holes like that before and never knew why.

**Already Gone** · 11-21-2014, 08:45 PM

Quote:

Originally Posted by BKSS67

It's a little off topic, but some food for thought....

I'm not sure on the availability of parts in Canada, but it would be cost prohibitive to straighten and re-chrome that bumper here. A good quality repop bumper would be about $250 plus shipping.

Is custom plating and metal work significantly cheaper in Canada?

No, its significantly higher ( as most things in Canada are compared to the USA ) but shipping to or from the USA, even Montana or North Dakota which my Province is attached to would be cost prohibitive.

**Already Gone** · 11-21-2014, 08:47 PM

Quote:

Originally Posted by C/10 King

I don't know the answer, but I've seen holes like that before and never knew why.

Are there holes on any of your original truck bumpers? A great thing about the hobby of 67-72's is that there is always something to learn.

**davischevy** · 11-21-2014, 10:26 PM

Yes the holes you have circled are original.

**Already Gone** · 11-21-2014, 10:42 PM

Quote:

Originally Posted by davischevy

Yes the holes you have circled are original.

Thanks for the info, now the big question, do you know what they are for ?

**NGN** · 11-21-2014, 11:18 PM

yep got them holes in my painted bumper also, I was actually thinking of putting red lights in them that work with the lights even the blinkers . but was talk out of it. before I painted it I was gonna weld tabs on the back to hold the wiring .

**michael bustamante** · 11-21-2014, 11:37 PM

I bet they are to mount bumper guards. Those 2 extensions with the rubber type stuff mounted on them
Oops nevermind. I just saw REAR bumper

**davischevy** · 11-22-2014, 12:11 AM

They have no operational purpose I know of. Maybe they were for the chrome plater to dip them.

**Already Gone** · 11-22-2014, 12:15 AM

Thanks for the replies. I guess I will leave them then.

**michael bustamante** · 11-22-2014, 12:59 PM

I just looked. My step rear bumper has em too.

oldertruckfan · 11-22-2014, 10:32 PM

does it have something to do with the bumper jack?

**davischevy** · 11-22-2014, 11:29 PM

These trucks had a screw jack, that set under the suspension, so bumper jacks don't apply.

leh72super1500 · 11-23-2014, 09:59 AM

I have two of these bumpers and can confirm that they are factory. In addition there are two adjacent notches in both of mine which I am curious about. Does anybody body have any idea what these may be for?
Thanks

oldertruckfan · 11-23-2014, 11:34 AM

just out of curiosity, if the holes are in the exact same place in the front bumper, they may be tooling holes used when forming the bumper. I've never seen the tooling for the original bumper, but it wouldn't surprise me if the front and the back bumper came from the same dies in the fabrication process

**davischevy** · 11-23-2014, 12:49 PM

You will enjoy the quality, long after you have forgotten the price.

**Already Gone** · 11-23-2014, 01:22 PM

Quote:

Originally Posted by leh72super1500

I have two of these bumpers and can confirm that they are factory. In addition there are two adjacent notches in both of mine which I am curious about. Does anybody body have any idea what these may be for?
Thanks

That is exactly what my bumper looks like and I have the notches as well.

leh72super1500 · 11-23-2014, 02:17 PM

A possible explanation for the holes and notches may be to accommodate a factory or specific aftermarket hitch. The holes would be for not necesarily bolting the hitch on but rather to stabilize the bumper after the hitch is on.

PanelDeland · 11-23-2014, 03:30 PM

Knowing GM's penchant for interchangeability, they may be Bumper jack holes/notches. The engineers may have come up with the suspension jack, probably as a money saving item before they finalized accessories but after the bumpers were designed. Or they may have been designed in as a spot for a High Lift jack since most trucks of this era were used as work trucks.

bigdog55 · 11-23-2014, 06:56 PM

my GMC has 4 holes across the back bumper and all are used for mounting

**Tim Christian** · 11-23-2014, 07:49 PM

Those two holes are for production chroming/painting they all had these holes.

11-21-2014, 08:23 PM	#1
Already Gone 70+ ( Old Skool Club ) Join Date: Nov 2003 Location: Saskatoon, Saskatchewan ,Canada Posts: 9,068	Rear Sport Bumper Question I am sending this original ( but very tired ) rear sport bumper for new chrome. There are a couple holes in it that know don't belong and they will be be filled and rechromed. My question is are the holes I have circled in the pics factory holes? They are perfect round and they are on the edge chrome but I cant see a need for them as the bumper mounts with 4 bolts along the centre of the bumper. If they aren't original holes I will get them filled as well. Attached Images __________________ 1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021

11-21-2014, 08:39 PM	#2
BKSS67 Registered User Join Date: Feb 2009 Location: Norcal, CA Posts: 169	Re: Rear Sport Bumper Question It's a little off topic, but some food for thought.... I'm not sure on the availability of parts in Canada, but it would be cost prohibitive to straighten and re-chrome that bumper here. A good quality repop bumper would be about $250 plus shipping. Is custom plating and metal work significantly cheaper in Canada?

11-21-2014, 10:26 PM	#6
davischevy Senior Member Join Date: Sep 2008 Location: Harrison, Arkansas Posts: 9,790	Re: Rear Sport Bumper Question Yes the holes you have circled are original. __________________ other Larry Build thread, Arkansas K10 https://67-72chevytrucks.com/vboard/...=755797&page=5 The ability to speak several languages is an asset, but the ability to keep your mouth shut in any language is priceless.

11-21-2014, 11:18 PM	#8
NGN Registered User Join Date: Nov 2001 Location: Old Bridge,NJ Posts: 814	Re: Rear Sport Bumper Question yep got them holes in my painted bumper also, I was actually thinking of putting red lights in them that work with the lights even the blinkers . but was talk out of it. before I painted it I was gonna weld tabs on the back to hold the wiring .

11-21-2014, 11:37 PM	#9
michael bustamante Senior Member Join Date: Sep 2007 Location: Albuquerque NM Posts: 7,814	Re: Rear Sport Bumper Question I bet they are to mount bumper guards. Those 2 extensions with the rubber type stuff mounted on them Oops nevermind. I just saw REAR bumper __________________ 1967custom

11-22-2014, 12:11 AM	#10
davischevy Senior Member Join Date: Sep 2008 Location: Harrison, Arkansas Posts: 9,790	Re: Rear Sport Bumper Question They have no operational purpose I know of. Maybe they were for the chrome plater to dip them. __________________ other Larry Build thread, Arkansas K10 https://67-72chevytrucks.com/vboard/...=755797&page=5 The ability to speak several languages is an asset, but the ability to keep your mouth shut in any language is priceless.

11-22-2014, 12:15 AM	#11
Already Gone 70+ ( Old Skool Club ) Join Date: Nov 2003 Location: Saskatoon, Saskatchewan ,Canada Posts: 9,068	Re: Rear Sport Bumper Question Thanks for the replies. I guess I will leave them then. __________________ 1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021

11-22-2014, 12:59 PM	#12
michael bustamante Senior Member Join Date: Sep 2007 Location: Albuquerque NM Posts: 7,814	Re: Rear Sport Bumper Question I just looked. My step rear bumper has em too. __________________ 1967custom

11-22-2014, 10:32 PM	#13
oldertruckfan Registered User Join Date: Mar 2014 Location: Spring Hill Kansas Posts: 209	Re: Rear Sport Bumper Question does it have something to do with the bumper jack?

11-22-2014, 11:29 PM	#14
davischevy Senior Member Join Date: Sep 2008 Location: Harrison, Arkansas Posts: 9,790	Re: Rear Sport Bumper Question These trucks had a screw jack, that set under the suspension, so bumper jacks don't apply. __________________ other Larry Build thread, Arkansas K10 https://67-72chevytrucks.com/vboard/...=755797&page=5 The ability to speak several languages is an asset, but the ability to keep your mouth shut in any language is priceless.

11-23-2014, 09:59 AM	#15
leh72super1500 GMC with Blue Plaid Join Date: Oct 2009 Location: Langdon, Alberta Posts: 139	Re: Rear Sport Bumper Question I have two of these bumpers and can confirm that they are factory. In addition there are two adjacent notches in both of mine which I am curious about. Does anybody body have any idea what these may be for? Thanks Attached Images __________________ Current: 1972 GMC Super Custom 1500 402 < 73K Orig MI 2015 GMC Canyon SLT(Daily Driver) Previous: 2008 Chevrolet Colorado LT 2.9L I4 1988 Chevrolet Suburban Silverado 10 350 < 60K Orig MI 1984 GMC S-15 2.8L V6 1976 GMC Sierra Classic 2500 Camper Special 350 1980 GMC High Sierra 3500 Dually 350 4spd 1974 Chevrolet Cheyenne Super 10 Shorty 454 (Was my Dads, I wish I still had it) 1969 GMC 910 250 I6 4spd

11-23-2014, 11:34 AM	#16
oldertruckfan Registered User Join Date: Mar 2014 Location: Spring Hill Kansas Posts: 209	Re: Rear Sport Bumper Question just out of curiosity, if the holes are in the exact same place in the front bumper, they may be tooling holes used when forming the bumper. I've never seen the tooling for the original bumper, but it wouldn't surprise me if the front and the back bumper came from the same dies in the fabrication process

11-23-2014, 12:49 PM	#17
davischevy Senior Member Join Date: Sep 2008 Location: Harrison, Arkansas Posts: 9,790	Re: Rear Sport Bumper Question You will enjoy the quality, long after you have forgotten the price. __________________ other Larry Build thread, Arkansas K10 https://67-72chevytrucks.com/vboard/...=755797&page=5 The ability to speak several languages is an asset, but the ability to keep your mouth shut in any language is priceless.

11-23-2014, 02:17 PM	#19
leh72super1500 GMC with Blue Plaid Join Date: Oct 2009 Location: Langdon, Alberta Posts: 139	Re: Rear Sport Bumper Question A possible explanation for the holes and notches may be to accommodate a factory or specific aftermarket hitch. The holes would be for not necesarily bolting the hitch on but rather to stabilize the bumper after the hitch is on. __________________ Current: 1972 GMC Super Custom 1500 402 < 73K Orig MI 2015 GMC Canyon SLT(Daily Driver) Previous: 2008 Chevrolet Colorado LT 2.9L I4 1988 Chevrolet Suburban Silverado 10 350 < 60K Orig MI 1984 GMC S-15 2.8L V6 1976 GMC Sierra Classic 2500 Camper Special 350 1980 GMC High Sierra 3500 Dually 350 4spd 1974 Chevrolet Cheyenne Super 10 Shorty 454 (Was my Dads, I wish I still had it) 1969 GMC 910 250 I6 4spd

11-23-2014, 03:30 PM	#20
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,993	Re: Rear Sport Bumper Question Knowing GM's penchant for interchangeability, they may be Bumper jack holes/notches. The engineers may have come up with the suspension jack, probably as a money saving item before they finalized accessories but after the bumpers were designed. Or they may have been designed in as a spot for a High Lift jack since most trucks of this era were used as work trucks. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"



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11-23-2014, 06:56 PM	#21
bigdog55 Registered User Join Date: Oct 2013 Location: TX Posts: 122	Re: Rear Sport Bumper Question my GMC has 4 holes across the back bumper and all are used for mounting Attached Images __________________ Brian

11-23-2014, 07:49 PM	#22
Tim Christian Senior Member Join Date: Dec 1999 Location: TN/VA Posts: 6,388	Re: Rear Sport Bumper Question Those two holes are for production chroming/painting they all had these holes.

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