Did they make Big 10's in 1985? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

8t5Silverado · 08-30-2004, 10:04 PM

I think this was asked before, but I can't find the thread.

My 85 is a Heavy Half, but does that make it a Big 10?

Thanks.

**swervin ervin** · 08-30-2004, 10:17 PM

Nope, no Big 10's in 85. I'm pretty sure 80 was the last year.

How do you know your 85 is a Heavy Half? There were no Heavy Half trucks in 85. 80 was the last year for the 1/2 Ton Heavy Duty Suspension.

Greenlee · 08-30-2004, 10:20 PM

It may be the same truck, but I don't think they put the Big 10 or Heavy Half stickers on them in 85.' I think that they stopped putting the stickers on around 79.' I'm not going on anything here but my memory.

EricS76 · 08-30-2004, 10:41 PM

They stopped making heavy halfs and big 10's when the federal emission gvwr break went from 6000lbs to 8000lbs. I believe that started on the '80 model year. You could get a half ton with a gvwr over 6000lbs without the heavy half or big 10 stickers, that may be what you have. My '77 has a 6000lb gvwr, but it's not a heavy half or big 10.

8t5Silverado · 09-01-2004, 05:57 PM

My GVWR is 5600.

My build sheet shows heavy duty springs (G50) and heavy duty brakes (J55).

EricS76 · 09-01-2004, 07:00 PM

As far as I know, all the big 10/heavy halfs were over 6000gvwr. But I'm not sure about the post-80 model ones. It's possible that a previous owner bought some heavy half stickers and put them on. I've seen alot of people buy Z-71 stickers and replace the 4x4 stickers with them on the 88-98 chevys.

8t5Silverado · 09-01-2004, 10:06 PM

I don't have any stickers or anything on the truck, I was just going off of the buildsheet.

**swervin ervin** · 09-01-2004, 10:46 PM

Quote:

Originally Posted by 8t5Silverado

My build sheet shows heavy duty springs (G50) and heavy duty brakes (J55).

My 85 came with G51 rear suspension which is the extra capacity, and J55 heavy duty brakes, but it's not a heavy half.

cliffsta · 09-01-2004, 11:11 PM

yeah im pretty sure GM discontinued the heavy half series in 80.

EricS76 · 09-02-2004, 09:11 AM

Ok then, the big 10 and heavy half was just a package that came with heavy duty springs to get your gvwr over 6000lbs. It also came with big 10 or heavy half stickers on the truck. Since your truck is less than 6000lbs, doesn't have the stickers, and is a post-80 model, it's very doubtful that it's either a heavy half or big 10.

80BIG10 · 09-02-2004, 09:37 AM

EricS76...I just saw that you are from the Llano way. I drive through Llano at least once a month. My wifes family is from Mason. Any pics of the truck?

And I do believe that 1980 was the last year of the "BIG10" and "HEAVY HALF". Now they may have had those options avialabe but not as those specific models.

80BIG10 · 09-02-2004, 09:50 AM

This is from.... http://www.chuckschevytruckpages.com/73-87specs.html

From 1973 - 1980 Chevy trucks had a 13 digit VIN#. From 1981 - 1987 Chevy Trucks used a 17 digit VIN#. If your 1973 - 1987 body style has a VIN# located on the dashboard, with 17 digits, then it is between 1981 and 1987 model. If your truck has the VIN# on the dash, but it is not 17 digits, then it is a 1979 or 1981 model. From 1973 - 1978 Chevy Trucks had the VIN# on a plate, mounted to the driver's door jamb. Your VIN# can also be found on the factory options decal, located in the glove box. The decal lists all the RPO's (Regular Production Options) your truck came from the factory equipped with. If the 4th digit of your VIN # is a 4, then your truck is a "Heavy Half" ton, also known as a "Big 10".

EricS76 · 09-02-2004, 06:12 PM

Quote:

Originally Posted by 80BIG10

EricS76...I just saw that you are from the Llano way. I drive through Llano at least once a month. My wifes family is from Mason. Any pics of the truck?

And I do believe that 1980 was the last year of the "BIG10" and "HEAVY HALF". Now they may have had those options avialabe but not as those specific models.

No picts get. I usually only drive it on the weekends. If you see a stock "santa fe tan" fleetside longbed that looks pretty rough, that's it. I haven't started the body work on it yet.

8t5Silverado · 09-02-2004, 06:45 PM

Thanks for the info guys.

08-30-2004, 10:04 PM	#1
8t5Silverado Mudslides 'r my specialty Join Date: Dec 2003 Location: STL Posts: 1,106	Did they make Big 10's in 1985? I think this was asked before, but I can't find the thread. My 85 is a Heavy Half, but does that make it a Big 10? Thanks. __________________ Always on the lookout for old cars and parts...(20s, 30s, 40s, 50s, 60s, etc.) http://www.cardomain.com/memberpage/500339

08-30-2004, 10:17 PM	#2
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	Nope, no Big 10's in 85. I'm pretty sure 80 was the last year. How do you know your 85 is a Heavy Half? There were no Heavy Half trucks in 85. 80 was the last year for the 1/2 Ton Heavy Duty Suspension. __________________ Mike 1985 Chevy C-10

08-30-2004, 10:41 PM	#4
EricS76 Registered User Join Date: May 2004 Location: Llano,TX Posts: 113	They stopped making heavy halfs and big 10's when the federal emission gvwr break went from 6000lbs to 8000lbs. I believe that started on the '80 model year. You could get a half ton with a gvwr over 6000lbs without the heavy half or big 10 stickers, that may be what you have. My '77 has a 6000lb gvwr, but it's not a heavy half or big 10. __________________ ‘66 Chevy C-10, long bed fleetside, 350, 3 on the tree, 4-7 drop. '77 chevy C-10 Custom Deluxe, 350, SM465 4 speed, flatbed. '80 jeep CJ-5. ‘14 Chevy 1500 Z71… Last edited by EricS76; 08-30-2004 at 10:46 PM.

09-01-2004, 05:57 PM	#5
8t5Silverado Mudslides 'r my specialty Join Date: Dec 2003 Location: STL Posts: 1,106	My GVWR is 5600. My build sheet shows heavy duty springs (G50) and heavy duty brakes (J55). __________________ Always on the lookout for old cars and parts...(20s, 30s, 40s, 50s, 60s, etc.) http://www.cardomain.com/memberpage/500339

09-01-2004, 07:00 PM	#6
EricS76 Registered User Join Date: May 2004 Location: Llano,TX Posts: 113	As far as I know, all the big 10/heavy halfs were over 6000gvwr. But I'm not sure about the post-80 model ones. It's possible that a previous owner bought some heavy half stickers and put them on. I've seen alot of people buy Z-71 stickers and replace the 4x4 stickers with them on the 88-98 chevys. __________________ ‘66 Chevy C-10, long bed fleetside, 350, 3 on the tree, 4-7 drop. '77 chevy C-10 Custom Deluxe, 350, SM465 4 speed, flatbed. '80 jeep CJ-5. ‘14 Chevy 1500 Z71…

08-30-2004, 10:20 PM	#3
Greenlee Registered User Join Date: Jun 2004 Location: El Lago, TX Posts: 1,668	It may be the same truck, but I don't think they put the Big 10 or Heavy Half stickers on them in 85.' I think that they stopped putting the stickers on around 79.' I'm not going on anything here but my memory.

09-01-2004, 10:06 PM	#7
8t5Silverado Mudslides 'r my specialty Join Date: Dec 2003 Location: STL Posts: 1,106	I don't have any stickers or anything on the truck, I was just going off of the buildsheet. __________________ Always on the lookout for old cars and parts...(20s, 30s, 40s, 50s, 60s, etc.) http://www.cardomain.com/memberpage/500339

09-01-2004, 11:11 PM	#9
cliffsta Stepsides RULE Join Date: Jul 2004 Location: Pineville, LA Posts: 1,921	yeah im pretty sure GM discontinued the heavy half series in 80. __________________ 1981 Chevy C10 Custom Deluxe Stepside 350 V8, headers, side exhausts, 3-speed auto SOLD 1980 Chevy C10 Custum Deluxe Stepside 305 V8, Edelbrock Performer Intake, Edelbrock 1406 600CFM 4-barrel, TH350C. Bent rod. SOLD 1984 GMC Sierra Classic Longbed 6.2L Diesel SOLD 2009 Kawasaki KLX-250S too many mods for this signature 1999 Honda Accord EX 4-cylinder, 17" Motegi Wheels 215/45/17 Sumitomo tires, Tein S-Tech lowering springs, KYB GR2 shocks, Acura TL 20mm rear swaybar, debadged, blackhoused headlights, Short-Ram Intake Cardomain of the Accord

09-02-2004, 09:11 AM	#10
EricS76 Registered User Join Date: May 2004 Location: Llano,TX Posts: 113	Ok then, the big 10 and heavy half was just a package that came with heavy duty springs to get your gvwr over 6000lbs. It also came with big 10 or heavy half stickers on the truck. Since your truck is less than 6000lbs, doesn't have the stickers, and is a post-80 model, it's very doubtful that it's either a heavy half or big 10. __________________ ‘66 Chevy C-10, long bed fleetside, 350, 3 on the tree, 4-7 drop. '77 chevy C-10 Custom Deluxe, 350, SM465 4 speed, flatbed. '80 jeep CJ-5. ‘14 Chevy 1500 Z71…

09-02-2004, 09:37 AM	#11
80BIG10 3 lefts make a right Join Date: Jun 2004 Location: Texas Hill Country Posts: 150	EricS76...I just saw that you are from the Llano way. I drive through Llano at least once a month. My wifes family is from Mason. Any pics of the truck? And I do believe that 1980 was the last year of the "BIG10" and "HEAVY HALF". Now they may have had those options avialabe but not as those specific models. Last edited by 80BIG10; 09-02-2004 at 09:41 AM.

09-02-2004, 09:50 AM	#12
80BIG10 3 lefts make a right Join Date: Jun 2004 Location: Texas Hill Country Posts: 150	This is from.... http://www.chuckschevytruckpages.com/73-87specs.html From 1973 - 1980 Chevy trucks had a 13 digit VIN#. From 1981 - 1987 Chevy Trucks used a 17 digit VIN#. If your 1973 - 1987 body style has a VIN# located on the dashboard, with 17 digits, then it is between 1981 and 1987 model. If your truck has the VIN# on the dash, but it is not 17 digits, then it is a 1979 or 1981 model. From 1973 - 1978 Chevy Trucks had the VIN# on a plate, mounted to the driver's door jamb. Your VIN# can also be found on the factory options decal, located in the glove box. The decal lists all the RPO's (Regular Production Options) your truck came from the factory equipped with. If the 4th digit of your VIN # is a 4, then your truck is a "Heavy Half" ton, also known as a "Big 10".

09-02-2004, 06:45 PM	#14
8t5Silverado Mudslides 'r my specialty Join Date: Dec 2003 Location: STL Posts: 1,106	Thanks for the info guys. __________________ Always on the lookout for old cars and parts...(20s, 30s, 40s, 50s, 60s, etc.) http://www.cardomain.com/memberpage/500339



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