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Old 01-14-2003, 01:12 PM   #1
George Taylor
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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.
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Old 01-14-2003, 01:18 PM   #2
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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!
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Old 01-14-2003, 01:24 PM   #3
George Taylor
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Yeah,That's what I was thinking but wasn't sure.
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Old 01-14-2003, 03:38 PM   #4
Grim Reaper
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12 mpg for a carb is about right. Only way to improve is with Fuel injection and Over drive.
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Old 01-14-2003, 05:37 PM   #5
George Taylor
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okay,Thank you!
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Old 01-14-2003, 05:38 PM   #6
George Taylor
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How can you put fuel injection in an early modle chevy with a 305 ?
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Old 01-14-2003, 05:43 PM   #7
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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.
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Old 01-14-2003, 05:45 PM   #8
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Here's one example:

http://store.summitracing.com/partdetail.asp?part=24001
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Old 01-14-2003, 06:06 PM   #9
George Taylor
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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.
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Old 01-14-2003, 06:11 PM   #10
George Taylor
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I just want to thank you for your time.It's hard to find anyone to talk to you about anything around here..lol
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Old 01-14-2003, 06:52 PM   #11
Grim Reaper
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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.
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Old 01-14-2003, 08:44 PM   #12
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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.
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Old 01-14-2003, 11:38 PM   #13
George Taylor
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Thanks for the help guys!!
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Old 02-03-2003, 12:52 AM   #14
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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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