So when in 1972 did GM start installing single wall tops? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**DeadheadNM** · 03-22-2016, 11:09 PM

My May 1972 Flint built Blazer has a single wall top (and speaker installed in the dash like a pickup). I suspect 1x wall tops were available in 72 only and were installed in the latter part of the MY but maybe that's not correct.

I'm curious for those who have K5s originally equipped with 1x wall tops, what month your K5 was built, Flint or St Louis built, and does your K5 have the speaker in the dash like a pickup?

We could also uncover who has the last K5 assembled for the 72 MY

**GMC-YA68** · 03-23-2016, 12:34 AM

How do you find the month?

**Beau2a** · 03-23-2016, 01:01 AM

My '72 Jimmy was assembled in March in Flint. #12,592. Also, no speaker in dash.

**Beau2a** · 03-23-2016, 01:03 AM

Mine also has a single wall top.

**GMC-YA68** · 03-23-2016, 04:52 PM

My Jimmy was from Flint (don't know the month?) Has single wall, center speaker and was #16,322.

JJH Jimmy · 03-23-2016, 07:03 PM

My 72 Jimmy 15,914 was built in Flint has a single wall top and center speaker in the dash.

**7D2N** · 03-23-2016, 07:54 PM

Single wall, speaker in dash, Flint and production #74,017 for my Blazer.

**DeadheadNM** · 03-23-2016, 10:26 PM

Sequence #s: great idea: My May 1972 Flint is 171,904 1x wall, in-dash speaker.

Soon to be mine 72 St. Louis 72 Blazer has sequence # 161,583 has a 2x wall top and speaker under the dash - not sure month of manufacture yet but sold new in March 1972

Thanks for posting, keep 'em coming.

**DeadheadNM** · 03-27-2016, 09:54 AM

Any St Louis built K5s originally equipped with 1x wall tops?

SS Tim · 03-28-2016, 01:20 PM

Here is a link to my previous post on the CC3 single wall top release information dated 01/72, for anyone that missed it.
http://67-72chevytrucks.com/vboard/s...&postcount=230

Since it was a supplemental release, survey of actual installations is an excellent idea. Based on the GM information single wall tops are expected on some mid to late 72MY units and I would be very suspect of earlier 72MY and down units.

**DeadheadNM** · 03-28-2016, 09:42 PM

Tim thanks so much for posting that. Really eager to see some St. Louis K5s w 1x wall tops that show Flint wasn't the only plant where GM was installing them. There certainly is precedent for plant specific variation though.

ClassicStyle · 03-28-2016, 10:22 PM

My 72 is a flint, delivery date of May, single wall top. My last blazer was built in flint as well, single wall top as well, unsure delivery date

**DeadheadNM** · 03-29-2016, 10:58 PM

Flint 148559 single wall top unknown location of speaker

ls1nova71 · 03-30-2016, 12:02 AM

My '72 blazer was built in St Louis, but had a double wall top. The holes to mount it looked to have been hand drilled, not very well, and the factory cage nuts for the single wall were in place, but filled with seam sealer before paint. Cant imagine they would put those in if they didn't put single walls on some of them? Also, mine doesn't have a speaker in the dash.

**DeadheadNM** · 03-30-2016, 10:31 PM

Thanks for posting! It seems the case that other (most?) 72s were outfitted w bed rails to accomodate either top regardless of which style, which is another interesting detail.

Senorx · 03-31-2016, 03:20 PM

Subscribed. Great thread, Pete.

**DeadheadNM** · 04-01-2016, 02:32 PM

Thanks!

Another: Jimmy 1972 CST 1x wall top w speaker in the dash Flint #514983

**DeadheadNM** · 05-30-2016, 10:15 AM

1972 Flint Blazer w a 2x top and sequence # 107636 (looks to be original to the truck), unknown speaker location. Early production 72 before switch to 1x wall?

Still no convincing 1x top equipped 1972 K5 from St. Louis.

**DeadheadNM** · 07-28-2016, 11:45 PM

Here's a flint built Jimmy assembled in August 1971 for the 72 MY w a double wall top. From eBay, not my notes on the pics.

Also lacks speaker vent atop the dash indicating an below dash speaker - seems the pattern w 2x wall tops.

**DeadheadNM** · 07-28-2016, 11:46 PM

More

**lolife99** · 07-29-2016, 12:13 AM

Great thread.

**DeadheadNM** · 08-08-2016, 10:02 PM

Quote:

Originally Posted by lolife99

Great thread.

Thanks Kieth. Ttt for more data.

Also interesting to note that the above ochre truck (post #18) has a total of four brackets that support the rear of the rear seat - the two I have here only have two brackets: one on either corner. A topic for another post. It's possible the belt boots on a four bracket seat differ from a two bracket seat.

**DeadheadNM** · 08-13-2016, 07:58 PM

Flint built 2x wall CKE182F103505 possibly original to the Blazer; unknown speaker location.

**DeadheadNM** · 08-13-2016, 08:06 PM

Flint 1x wall CKE182F187363 unknown speaker location.

**DeadheadNM** · 08-13-2016, 08:10 PM

Flint 1x wall CKE182F186236 unknown speaker location

03-23-2016, 12:34 AM	#2
GMC-YA68 Senior Member Join Date: Mar 2004 Location: Lee's Summit, MO (KC) Posts: 742	Re: So when in 1972 did GM start installing single wall tops? How do you find the month? __________________ -Keegan- '72 Jimmy 4x4 - 5.3/4L65E/NP205 swap http://67-72chevytrucks.com/vboard/s...d.php?t=663780

03-23-2016, 01:01 AM	#3
Beau2a Senior Member Join Date: Jan 2016 Location: Enumclaw WA Posts: 267	Re: So when in 1972 did GM start installing single wall tops? My '72 Jimmy was assembled in March in Flint. #12,592. Also, no speaker in dash.

03-23-2016, 01:03 AM	#4
Beau2a Senior Member Join Date: Jan 2016 Location: Enumclaw WA Posts: 267	Re: So when in 1972 did GM start installing single wall tops? Mine also has a single wall top.

03-23-2016, 07:03 PM	#6
JJH Jimmy Registered User Join Date: Jun 2012 Location: Schoolcraft, Michigan Posts: 928	Re: So when in 1972 did GM start installing single wall tops? My 72 Jimmy 15,914 was built in Flint has a single wall top and center speaker in the dash. __________________ 1972 GMC Jimmy 4x4 LS Swap 1985 Chevy K20 1994 GMC Yukon 2021 GMC 2500HD Duramax AT4 My "It's a Jimmy Thing" Build http://67-72chevytrucks.com/vboard/s...d.php?t=583528 Budget Build 1985 K20 http://67-72chevytrucks.com/vboard/s...d.php?t=801565 Last edited by JJH Jimmy; 03-24-2016 at 07:10 AM.

03-23-2016, 10:26 PM	#8
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,422	Re: So when in 1972 did GM start installing single wall tops? Sequence #s: great idea: My May 1972 Flint is 171,904 1x wall, in-dash speaker. Soon to be mine 72 St. Louis 72 Blazer has sequence # 161,583 has a 2x wall top and speaker under the dash - not sure month of manufacture yet but sold new in March 1972 Thanks for posting, keep 'em coming. __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland

03-22-2016, 11:09 PM	#1
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,422	So when in 1972 did GM start installing single wall tops? My May 1972 Flint built Blazer has a single wall top (and speaker installed in the dash like a pickup). I suspect 1x wall tops were available in 72 only and were installed in the latter part of the MY but maybe that's not correct. I'm curious for those who have K5s originally equipped with 1x wall tops, what month your K5 was built, Flint or St Louis built, and does your K5 have the speaker in the dash like a pickup? We could also uncover who has the last K5 assembled for the 72 MY __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland Last edited by DeadheadNM; 03-23-2016 at 09:34 AM.

03-23-2016, 04:52 PM	#5
GMC-YA68 Senior Member Join Date: Mar 2004 Location: Lee's Summit, MO (KC) Posts: 742	Re: So when in 1972 did GM start installing single wall tops? My Jimmy was from Flint (don't know the month?) Has single wall, center speaker and was #16,322. __________________ -Keegan- '72 Jimmy 4x4 - 5.3/4L65E/NP205 swap http://67-72chevytrucks.com/vboard/s...d.php?t=663780

03-23-2016, 07:54 PM	#7
7D2N Senior Member Join Date: Aug 2007 Location: Morgan County Utah Posts: 703	Re: So when in 1972 did GM start installing single wall tops? Single wall, speaker in dash, Flint and production #74,017 for my Blazer.

03-27-2016, 09:54 AM	#9
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,422	Re: So when in 1972 did GM start installing single wall tops? Any St Louis built K5s originally equipped with 1x wall tops? __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland

03-28-2016, 01:20 PM	#10
SS Tim Registered User Join Date: Aug 2010 Location: Edwards, CA Posts: 7,503	Re: So when in 1972 did GM start installing single wall tops? Here is a link to my previous post on the CC3 single wall top release information dated 01/72, for anyone that missed it. http://67-72chevytrucks.com/vboard/s...&postcount=230 Since it was a supplemental release, survey of actual installations is an excellent idea. Based on the GM information single wall tops are expected on some mid to late 72MY units and I would be very suspect of earlier 72MY and down units. __________________ Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID Blazer SPID Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders Do you have a 1972 Plaid Pickup? Plaid Blazer ** Plaid Suburban Last edited by SS Tim; 03-28-2016 at 01:26 PM. Reason: ref :csn v44 01/72 #1 pg2

03-28-2016, 09:42 PM	#11
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,422	Re: So when in 1972 did GM start installing single wall tops? Tim thanks so much for posting that. Really eager to see some St. Louis K5s w 1x wall tops that show Flint wasn't the only plant where GM was installing them. There certainly is precedent for plant specific variation though. __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland

03-28-2016, 10:22 PM	#12
ClassicStyle Registered User Join Date: Aug 2005 Location: Scottsdale, AZ Posts: 215	Re: So when in 1972 did GM start installing single wall tops? My 72 is a flint, delivery date of May, single wall top. My last blazer was built in flint as well, single wall top as well, unsure delivery date __________________ 1972 Dark blue, Cst, Highlander

03-29-2016, 10:58 PM	#13
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,422	Re: So when in 1972 did GM start installing single wall tops? Flint 148559 single wall top unknown location of speaker __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland

03-30-2016, 12:02 AM	#14
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,118	Re: So when in 1972 did GM start installing single wall tops? My '72 blazer was built in St Louis, but had a double wall top. The holes to mount it looked to have been hand drilled, not very well, and the factory cage nuts for the single wall were in place, but filled with seam sealer before paint. Cant imagine they would put those in if they didn't put single walls on some of them? Also, mine doesn't have a speaker in the dash. __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html

03-30-2016, 10:31 PM	#15
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,422	Re: So when in 1972 did GM start installing single wall tops? Thanks for posting! It seems the case that other (most?) 72s were outfitted w bed rails to accomodate either top regardless of which style, which is another interesting detail. __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland



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03-31-2016, 03:20 PM	#16
Senorx Registered User Join Date: Jan 2014 Location: South Texas Posts: 567	Re: So when in 1972 did GM start installing single wall tops? Subscribed. Great thread, Pete.

04-01-2016, 02:32 PM	#17
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,422	Re: So when in 1972 did GM start installing single wall tops? Thanks! Another: Jimmy 1972 CST 1x wall top w speaker in the dash Flint #514983 __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland

05-30-2016, 10:15 AM	#18
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,422	Re: So when in 1972 did GM start installing single wall tops? 1972 Flint Blazer w a 2x top and sequence # 107636 (looks to be original to the truck), unknown speaker location. Early production 72 before switch to 1x wall? Still no convincing 1x top equipped 1972 K5 from St. Louis. Attached Images __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland

07-28-2016, 11:45 PM	#19
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,422	Re: So when in 1972 did GM start installing single wall tops? Here's a flint built Jimmy assembled in August 1971 for the 72 MY w a double wall top. From eBay, not my notes on the pics. Also lacks speaker vent atop the dash indicating an below dash speaker - seems the pattern w 2x wall tops. Attached Images __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland Last edited by DeadheadNM; 07-29-2016 at 11:07 PM.

07-28-2016, 11:46 PM	#20
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,422	Re: So when in 1972 did GM start installing single wall tops? More Attached Images __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland

07-29-2016, 12:13 AM	#21
lolife99 67-72 parts collector,… Join Date: Nov 2002 Location: Mid-MO Posts: 22,699	Re: So when in 1972 did GM start installing single wall tops? Great thread. __________________ Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823

08-13-2016, 07:58 PM	#23
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,422	Re: So when in 1972 did GM start installing single wall tops? Flint built 2x wall CKE182F103505 possibly original to the Blazer; unknown speaker location. Attached Images __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland Last edited by DeadheadNM; 08-13-2016 at 08:11 PM.

08-13-2016, 08:06 PM	#24
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,422	Re: So when in 1972 did GM start installing single wall tops? Flint 1x wall CKE182F187363 unknown speaker location. Attached Images __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland Last edited by DeadheadNM; 08-13-2016 at 08:11 PM.

08-13-2016, 08:10 PM	#25
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,422	Re: So when in 1972 did GM start installing single wall tops? Flint 1x wall CKE182F186236 unknown speaker location Attached Images __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland

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