So when in 1972 did GM start installing single wall tops? - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

chad75 · 08-14-2016, 03:19 PM

Why did they switch to single wall? Cheaper?

**DeadheadNM** · 08-14-2016, 10:47 PM

Quote:

Originally Posted by chad75

Why did they switch to single wall? Cheaper?

Wish I knew for certain. I'd speculate that the double wall tops were sagging and required the owner of a CST to remove the rear panels before top removal (a pita) so GM tried a new design ahead of the 73 model year. Thus far the data shows that single wall tops were used for only a portion of the 72 MY and only on K5s built at flint.

**DeadheadNM** · 08-17-2016, 11:17 PM

Flint built 1x wall 126497

**DeadheadNM** · 08-17-2016, 11:18 PM

one more

**DeadheadNM** · 08-17-2016, 11:26 PM

Switch from 2x wall to 1x wall at Flint some where between sequence #'s 7,636 and 12,592.

**DeadheadNM** · 09-05-2016, 11:09 AM

Another early 1972 MY Flint built Blazer (sequence 102567) with 2x wall top and a speaker below the dash:

**DeadheadNM** · 03-15-2017, 11:45 PM

A first for the record???

St Louis built 72 Blazer seq # 146724 that looks to be a near survivor and has a 1x wall top. On the hunt for additional St Louis built k5s that have the reasonable expectation of being originally outfitted with a 1x wall top.

Link to more pics: http://www.ebay.com/itm/1972-Chevrol...FYx1Cl&vxp=mtr

**DeadheadNM** · 03-15-2017, 11:49 PM

One by one on the iPad....

**DeadheadNM** · 03-15-2017, 11:50 PM

Another...

**DeadheadNM** · 03-15-2017, 11:52 PM

More...

**DeadheadNM** · 03-15-2017, 11:53 PM

Uno mas...

**BlazerBill** · 03-22-2017, 07:42 PM

I believe that 72 was the only year, that had double wall. With the ribbing running side to side. That's the way my three were configured. 69 4wd, 71 4wd
72 2wd highlander grapefruit yellow w/avocado cst.
Just a theory.

**DeadheadNM** · 07-24-2018, 09:59 PM

Here's a transition Flint built Blazer that has a single wall top and lacks speaker holes atop the dash so uses a below dash speaker. This truck has a November assembly month per the blue door vin decal. Sequence # 127656

Any single wall St Louis survivors?

**DeadheadNM** · 07-24-2018, 10:01 PM

...

**DeadheadNM** · 07-24-2018, 10:02 PM

More....

2006gmcdmax · 07-24-2018, 10:09 PM

Here's my tag, built June of 72. Single wall top and speaker on the top of the dash just like the pickups.

**DeadheadNM** · 07-24-2018, 10:20 PM

Quote:

Originally Posted by 2006gmcdmax

Here's my tag, built June of 72. Single wall top and speaker on the top of the dash just like the pickups.

Thanks for posting. June is late in the model year - makes me wonder who on the board has the last 72 that rolled off the assembly line...

**DeadheadNM** · 07-24-2018, 10:03 PM

Top...

**DeadheadNM** · 08-03-2019, 11:16 AM

Clean looking 2wd on eBay (https://www.ebay.com/itm/1972-Chevro...temCondition=4) - Flint built 1x wall top w speaker below the dash. Looks reasonably unmolested. Not best image of the dash top.

Sequence # 156067

**BlazerBill** · 08-03-2019, 01:08 PM

My Blazer has a build date of 3/72 with swt and the radio speaker up under the dash between the defrost vents. Has a higher vin number, can that even be possible ???

**DeadheadNM** · 08-03-2019, 05:51 PM

Thanks for posting. If the ochre is correct, it suggests the switch to an internal dash speaker like a pickup happened between 156067 and 165204 at Flint.

The double wall top was dropped for a single wall top. Later in the model year, the traditional K5 dash was phased out for the pickup style with a speaker grill. Interesting.

**richard2717** · 08-04-2019, 09:14 AM

Pete
I have or had 3 72' Flint Blazers. Spids below. One came with a double wall the other two are or were single wall. Only the DW Blazer still has the blue door tag but I can't make out the date on it. The other one has been painted over. All three did not have speaker grill in top of dash.

.

**DeadheadNM** · 08-04-2019, 09:31 AM

Helpful info - thanks for posting. Let me guess, SPID for sequence # 111983 was the 2x wall example?

Your info would narrow down the dash change to between 160889 - 165204

**richard2717** · 08-04-2019, 09:41 AM

Quote:

Originally Posted by DeadheadNM

Helpful info - thanks for posting. Let me guess, SPID for sequence # 111983 was the 2x wall example?

Your info would narrow down the dash change to between 160889 - 165204

Correct the olive green one is the 2x

**DeadheadNM** · 08-04-2019, 10:06 AM

Quote:

Originally Posted by richard2717

Correct the olive green one is the 2x

That narrows the switch from double wall tops to single wall tops between sequence numbers 111,983 - 112,592. These numbers must be within a day or so of each other in terms or rolling off the line as finished vehicles.

08-14-2016, 03:19 PM	#1
chad75 Registered User Join Date: Dec 2014 Location: Yuma, AZ Posts: 58	Re: So when in 1972 did GM start installing single wall tops? Why did they switch to single wall? Cheaper?

08-17-2016, 11:17 PM	#3
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,424	Re: So when in 1972 did GM start installing single wall tops? Flint built 1x wall 126497 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

08-17-2016, 11:18 PM	#4
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,424	Re: So when in 1972 did GM start installing single wall tops? one 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

08-17-2016, 11:26 PM	#5
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,424	Re: So when in 1972 did GM start installing single wall tops? Switch from 2x wall to 1x wall at Flint some where between sequence #'s 7,636 and 12,592. __________________ 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

09-05-2016, 11:09 AM	#6
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,424	Re: So when in 1972 did GM start installing single wall tops? Another early 1972 MY Flint built Blazer (sequence 102567) with 2x wall top and a speaker below the dash: 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

03-15-2017, 11:45 PM	#7
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,424	Re: So when in 1972 did GM start installing single wall tops? A first for the record??? St Louis built 72 Blazer seq # 146724 that looks to be a near survivor and has a 1x wall top. On the hunt for additional St Louis built k5s that have the reasonable expectation of being originally outfitted with a 1x wall top. Link to more pics: http://www.ebay.com/itm/1972-Chevrol...FYx1Cl&vxp=mtr 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; 03-15-2017 at 11:56 PM.

03-15-2017, 11:49 PM	#8
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,424	Re: So when in 1972 did GM start installing single wall tops? One by one on the iPad.... 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

03-15-2017, 11:50 PM	#9
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,424	Re: So when in 1972 did GM start installing single wall tops? Another... 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

03-15-2017, 11:52 PM	#10
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,424	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

03-15-2017, 11:53 PM	#11
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,424	Re: So when in 1972 did GM start installing single wall tops? Uno mas... 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

03-22-2017, 07:42 PM	#12
BlazerBill Senior Member Join Date: Apr 2013 Location: Northern ca. Wine country Posts: 405	Re: So when in 1972 did GM start installing single wall tops? I believe that 72 was the only year, that had double wall. With the ribbing running side to side. That's the way my three were configured. 69 4wd, 71 4wd 72 2wd highlander grapefruit yellow w/avocado cst. Just a theory.

07-24-2018, 09:59 PM	#13
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,424	Re: So when in 1972 did GM start installing single wall tops? Here's a transition Flint built Blazer that has a single wall top and lacks speaker holes atop the dash so uses a below dash speaker. This truck has a November assembly month per the blue door vin decal. Sequence # 127656 Any single wall St Louis survivors? 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; 07-24-2018 at 10:04 PM.

07-24-2018, 10:01 PM	#14
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,424	Re: So when in 1972 did GM start installing single 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

07-24-2018, 10:02 PM	#15
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,424	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

07-24-2018, 10:09 PM	#16
2006gmcdmax Registered User Join Date: Oct 2014 Location: St. Paul Minnesota Posts: 195	Re: So when in 1972 did GM start installing single wall tops? Here's my tag, built June of 72. Single wall top and speaker on the top of the dash just like the pickups. Attached Images



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07-24-2018, 10:03 PM	#18
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,424	Re: So when in 1972 did GM start installing single wall tops? Top... 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

08-03-2019, 11:16 AM	#19
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,424	Re: So when in 1972 did GM start installing single wall tops? Clean looking 2wd on eBay (https://www.ebay.com/itm/1972-Chevro...temCondition=4) - Flint built 1x wall top w speaker below the dash. Looks reasonably unmolested. Not best image of the dash top. Sequence # 156067 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

08-03-2019, 01:08 PM	#20
BlazerBill Senior Member Join Date: Apr 2013 Location: Northern ca. Wine country Posts: 405	Re: So when in 1972 did GM start installing single wall tops? My Blazer has a build date of 3/72 with swt and the radio speaker up under the dash between the defrost vents. Has a higher vin number, can that even be possible ??? Attached Images

08-03-2019, 05:51 PM	#21
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,424	Re: So when in 1972 did GM start installing single wall tops? Thanks for posting. If the ochre is correct, it suggests the switch to an internal dash speaker like a pickup happened between 156067 and 165204 at Flint. The double wall top was dropped for a single wall top. Later in the model year, the traditional K5 dash was phased out for the pickup style with a speaker grill. Interesting. __________________ 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; 08-03-2019 at 06:05 PM.

08-04-2019, 09:14 AM	#22
richard2717 Equal opportunity joke ofender Join Date: Oct 2011 Location: Eastern Shore of MD Posts: 10,097	Re: So when in 1972 did GM start installing single wall tops? Pete I have or had 3 72' Flint Blazers. Spids below. One came with a double wall the other two are or were single wall. Only the DW Blazer still has the blue door tag but I can't make out the date on it. The other one has been painted over. All three did not have speaker grill in top of dash. . Attached Images __________________ Members I have met. Dually Jams, OlBlue60, ScottH, Tommyboy24, Dujobo, Warbucket, 2003 Silverado, Notsolo, my90k5, 6t727t2, Special-K ,Jack_71C10, tabarcus,72blazer_mud_bogger,pwdcougar,RSavage,EricSean,1Rippen6,invicta455,tennaragtop71,arks, Kendal,Bennett68C10, Perpendicular, Chainsawman, McGeesCustomMinis,ShortbedClayton,longblue72,6768chevylover,Tim71,Travisarmenta,Ol' Drippy,fleetmitch,georgieb51,Dave,bcnya2,Dadsburb https://paypal.me/6772GMtruckparts Most women like the strong, silent type… Fortunately for me, my wife prefers the out-of-shape, mouthy type.

08-04-2019, 09:31 AM	#23
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,424	Re: So when in 1972 did GM start installing single wall tops? Helpful info - thanks for posting. Let me guess, SPID for sequence # 111983 was the 2x wall example? Your info would narrow down the dash change to between 160889 - 165204 __________________ 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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