1986 GMC Pickup - The 1947 - Present Chevrolet & GMC Truck Message Board Network

George Taylor · 01-14-2003, 01:12 PM

Hi guys,I hope someone can answer these questions for me,I can't seem to find anyone who can.I have a 1986 1500 Sierra GMC Pickup truck,I would like to change it to a Sierra Granda inside and out,I would like to get a new seat,front bumper,dash cover and floor mats for it,Does anyone know where I can go to get these,I am also having problems with the gas mileage,I only get 12 miles to a gallon with it right now,Can I put an overdrive R-4 Transin in it to get better gas mileage? I have a 305-3speed in it already it is all original.

BigRed · 01-14-2003, 01:18 PM

Welcome George. You can get all the parts from a vendor like LMC. There are others too though. Check out this link of my website to see some of these vendors. http://www.shelbournes.net/trucksite/links.htm

As far as the gas mileage problem, you may want to post that in the 73-87 Message Board forum for more response. The 700r4 will help with the gas mileage if you drive alot of highway miles. However, it could also be a carb issue. I wish I could get 12 mpg!

George Taylor · 01-14-2003, 01:24 PM

Yeah,That's what I was thinking but wasn't sure.

Grim Reaper · 01-14-2003, 03:38 PM

12 mpg for a carb is about right. Only way to improve is with Fuel injection and Over drive.

George Taylor · 01-14-2003, 05:37 PM

okay,Thank you!

George Taylor · 01-14-2003, 05:38 PM

How can you put fuel injection in an early modle chevy with a 305 ?

BigRed · 01-14-2003, 05:43 PM

Edelbrock and other mfg's make kits but they're not cheap. You can look at www.summitracing.com or www.jegs.com or www.edelbrock.com for some of the kits.

BigRed · 01-14-2003, 05:45 PM

Here's one example:

http://store.summitracing.com/partdetail.asp?part=24001

George Taylor · 01-14-2003, 06:06 PM

Dang,Your right they aren't cheap! I guess if you have that kind of money it's a great thing to do.But I can't,I'm going to have to deal with out.

George Taylor · 01-14-2003, 06:11 PM

I just want to thank you for your time.It's hard to find anyone to talk to you about anything around here..lol

Grim Reaper · 01-14-2003, 06:52 PM

This guy is a lot cheaper then that Holly junk and a better system to boot. All stock GM parts with chip taylored to your engine if you can provide him the information.
http://www.customefis.com/ Tell him the guy for ColoradoK5 sent you.

gchemist · 01-14-2003, 08:44 PM

If you want GM fuel injection TBI and TPI are very affordable. Checkout this TBI installation. He did it under $350 after selling some parts off his carb engine. My choice is TPI. There are plenty of part off Camaros, Firebirds and Corvettes. Checkout www.ebaymotors.com for TPI parts.

I get 12 MPG with the tailgate up. If I remove it or add a tonneau cover I average up to 16-18 MPG!! All with a 305/700R4/3.08 rear and 255/60R15 tires.

George Taylor · 01-14-2003, 11:38 PM

Thanks for the help guys!!

86k10 · 02-03-2003, 12:52 AM

Hey George, you can probably tell by my name what I drive. Anyway, it was originally equipped with a 305 and a 700 r4 trans, and normal mileage for it was about 16 or 17 on a fairly long drive, but I did a check to see how much better the 4th gear was for mileage and it only made a 1 mpg difference. It depends on what gears you have. I had 3.08 and that was to high for the 4 speed trans. Now it has a 455 Olds with the original 700R4 trans, 4.10 gears and still gets around 16 or 17. So I think I would check your carb out first, cause you got to remember the 305 has no power if it's running to slow, and that I can say from experience. Let me know how it turns out.

01-14-2003, 01:12 PM	#1
George Taylor Registered User Join Date: Jan 2003 Location: Houston Tx Posts: 13	1986 GMC Pickup Hi guys,I hope someone can answer these questions for me,I can't seem to find anyone who can.I have a 1986 1500 Sierra GMC Pickup truck,I would like to change it to a Sierra Granda inside and out,I would like to get a new seat,front bumper,dash cover and floor mats for it,Does anyone know where I can go to get these,I am also having problems with the gas mileage,I only get 12 miles to a gallon with it right now,Can I put an overdrive R-4 Transin in it to get better gas mileage? I have a 305-3speed in it already it is all original.

01-14-2003, 01:18 PM	#2
BigRed Registered User Join Date: Jun 2002 Location: DFW, TX Posts: 1,680	Welcome George. You can get all the parts from a vendor like LMC. There are others too though. Check out this link of my website to see some of these vendors. http://www.shelbournes.net/trucksite/links.htm As far as the gas mileage problem, you may want to post that in the 73-87 Message Board forum for more response. The 700r4 will help with the gas mileage if you drive alot of highway miles. However, it could also be a carb issue. I wish I could get 12 mpg! __________________ Scott Shelbourne

01-14-2003, 03:38 PM	#4
Grim Reaper Registered User Join Date: Jul 2001 Location: Atlanta GA Posts: 1,704	12 mpg for a carb is about right. Only way to improve is with Fuel injection and Over drive. __________________ Grim-Reaper 70 Pontiac LeMans Sport Convertible, worlds longest resto in progress Looking for 71-72 2wd Blazer or Jimmy Project

01-14-2003, 05:43 PM	#7
BigRed Registered User Join Date: Jun 2002 Location: DFW, TX Posts: 1,680	Edelbrock and other mfg's make kits but they're not cheap. You can look at www.summitracing.com or www.jegs.com or www.edelbrock.com for some of the kits. __________________ Scott Shelbourne

01-14-2003, 05:45 PM	#8
BigRed Registered User Join Date: Jun 2002 Location: DFW, TX Posts: 1,680	Here's one example: http://store.summitracing.com/partdetail.asp?part=24001 __________________ Scott Shelbourne

01-14-2003, 01:24 PM	#3
George Taylor Registered User Join Date: Jan 2003 Location: Houston Tx Posts: 13	Yeah,That's what I was thinking but wasn't sure.

01-14-2003, 05:37 PM	#5
George Taylor Registered User Join Date: Jan 2003 Location: Houston Tx Posts: 13	okay,Thank you!

01-14-2003, 05:38 PM	#6
George Taylor Registered User Join Date: Jan 2003 Location: Houston Tx Posts: 13	How can you put fuel injection in an early modle chevy with a 305 ?

01-14-2003, 06:06 PM	#9
George Taylor Registered User Join Date: Jan 2003 Location: Houston Tx Posts: 13	Dang,Your right they aren't cheap! I guess if you have that kind of money it's a great thing to do.But I can't,I'm going to have to deal with out.

01-14-2003, 06:11 PM	#10
George Taylor Registered User Join Date: Jan 2003 Location: Houston Tx Posts: 13	I just want to thank you for your time.It's hard to find anyone to talk to you about anything around here..lol

01-14-2003, 06:52 PM	#11
Grim Reaper Registered User Join Date: Jul 2001 Location: Atlanta GA Posts: 1,704	This guy is a lot cheaper then that Holly junk and a better system to boot. All stock GM parts with chip taylored to your engine if you can provide him the information. http://www.customefis.com/ Tell him the guy for ColoradoK5 sent you. __________________ Grim-Reaper 70 Pontiac LeMans Sport Convertible, worlds longest resto in progress Looking for 71-72 2wd Blazer or Jimmy Project

01-14-2003, 08:44 PM	#12
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	If you want GM fuel injection TBI and TPI are very affordable. Checkout this TBI installation. He did it under $350 after selling some parts off his carb engine. My choice is TPI. There are plenty of part off Camaros, Firebirds and Corvettes. Checkout www.ebaymotors.com for TPI parts. I get 12 MPG with the tailgate up. If I remove it or add a tonneau cover I average up to 16-18 MPG!! All with a 305/700R4/3.08 rear and 255/60R15 tires. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

01-14-2003, 11:38 PM	#13
George Taylor Registered User Join Date: Jan 2003 Location: Houston Tx Posts: 13	Thanks for the help guys!!

02-03-2003, 12:52 AM	#14
86k10 Registered User Join Date: Feb 2003 Location: Bertrand, Nebraska Posts: 355	Hey George, you can probably tell by my name what I drive. Anyway, it was originally equipped with a 305 and a 700 r4 trans, and normal mileage for it was about 16 or 17 on a fairly long drive, but I did a check to see how much better the 4th gear was for mileage and it only made a 1 mpg difference. It depends on what gears you have. I had 3.08 and that was to high for the 4 speed trans. Now it has a 455 Olds with the original 700R4 trans, 4.10 gears and still gets around 16 or 17. So I think I would check your carb out first, cause you got to remember the 305 has no power if it's running to slow, and that I can say from experience. Let me know how it turns out.



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