My 'new' 1970 Sierra Grande - The 1947 - Present Chevrolet & GMC Truck Message Board Network

davepl · 12-30-2011, 02:29 PM

I just bought this 1970 GMC Sierra Grande Custom Camper Longhorn, w/ 402, buckets and console, AC, and a number of other options. Got it locally from another forum member, so you might well have seen it before.

I'm sure I'll have a ton of questions, but I'll start with just a couple!

1) It has three fuel tanks (behind the seat, one filler at each side of bed). How do these work? Are they all interconnected, or where's the switch to go from one to the other? And what does the gauge show, just the main tank?

2) It has Amps-Oil-Temp gauges, but one of the little pods is empty. Is there ever a fourth small gauge, like a clock or something? Or if not, was it used on the C40/C50/C60 series for something?

3) My understanding is that the 2500 Longhorn has the one-ton frame. Other than springs, what's actually different between that and the standard half-ton?

Thanks!
Dave

bmfm64 · 12-30-2011, 02:37 PM

Good catch! I'm jealous!

**70cst** · 12-30-2011, 02:51 PM

On the buy on a well optioned and good lookin

Sicklajoie · 12-30-2011, 02:55 PM

Congrats! Sharp truck!

**RenoKeene** · 12-30-2011, 02:58 PM

Exellent truck, glad you bought it!
There should be a aux fuel tanks switch on the floor by the drivers door, not sure if the fuel guage is tied to the saddle tanks or not. My Custom Camper also had a fuel switch on the dash to the left of the guage bezel. The empty hole in the guage bezel is for a vacuum guage.
I can help you with your engine and under the hood stuff as I have the same thing but I'll leave the Longhorn stuff to those that have one.
Congrats again!

black_sheep454 · 12-30-2011, 04:47 PM

Man the interior in that truck is gorgeous.
Posted via Mobile Device

12-30-2011, 02:29 PM	#1
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	My 'new' 1970 Sierra Grande I just bought this 1970 GMC Sierra Grande Custom Camper Longhorn, w/ 402, buckets and console, AC, and a number of other options. Got it locally from another forum member, so you might well have seen it before. I'm sure I'll have a ton of questions, but I'll start with just a couple! 1) It has three fuel tanks (behind the seat, one filler at each side of bed). How do these work? Are they all interconnected, or where's the switch to go from one to the other? And what does the gauge show, just the main tank? 2) It has Amps-Oil-Temp gauges, but one of the little pods is empty. Is there ever a fourth small gauge, like a clock or something? Or if not, was it used on the C40/C50/C60 series for something? 3) My understanding is that the 2500 Longhorn has the one-ton frame. Other than springs, what's actually different between that and the standard half-ton? Thanks! Dave Attached Images __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible

12-30-2011, 02:37 PM	#2
bmfm64 Registered User Join Date: May 2011 Location: Covington, Wa Posts: 5,240	Re: My 'new' 1970 Sierra Grande Good catch! I'm jealous!

12-30-2011, 02:51 PM	#3
70cst Senior Member Join Date: Feb 2001 Location: New Madison, Ohio Posts: 21,373	Re: My 'new' 1970 Sierra Grande On the buy on a well optioned and good lookin __________________ A husband can be right...or...A husband can be happy. 67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk. 1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc JOHN 17:3...The better side of "LIFE" Remember: Everyday is a good day...Some are just gooder!

12-30-2011, 02:55 PM	#4
Sicklajoie The Niner Join Date: Nov 2010 Location: Broad Brook, CT Posts: 2,499	Re: My 'new' 1970 Sierra Grande Congrats! Sharp truck! __________________ "A good racer is one whose head is in communication with his balls." - Richie Evans 1970 C/20 - 402/TH400/3.54s - 74K miles 2003 GMC Sierra 2500 - Wheatland Yellow Niner Progression Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=697183 Classic Trucks article: https://www.motortrend.com/features/...et-c20-driven/

12-30-2011, 02:58 PM	#5
RenoKeene Florida Edition Join Date: Oct 2010 Location: Fruitland Park, FL Posts: 4,028	Re: My 'new' 1970 Sierra Grande Exellent truck, glad you bought it! There should be a aux fuel tanks switch on the floor by the drivers door, not sure if the fuel guage is tied to the saddle tanks or not. My Custom Camper also had a fuel switch on the dash to the left of the guage bezel. The empty hole in the guage bezel is for a vacuum guage. I can help you with your engine and under the hood stuff as I have the same thing but I'll leave the Longhorn stuff to those that have one. Congrats again! __________________ 70 GMC Short Stepside "Rose"-An American Beauty: Factory 402/TH400, AM/FM, AC, Tilt, Tach, Buckets, Posi, PS, PB, 3-5 Drop, Complete Resto-Rod 67 C-20 Slant Back Wrecker "Mad Max" 67 C-10 Ratrod "Step-N-Wolf" 71 Serro Scotty Sportsman camper "Scotty" 97 LT1 Z28 "The Hornet" Link to more pics of "Rose" http://67-72chevytrucks.com/vboard/a...p?albumid=1684 Check out my "Cheap Tricks" thread and add to it if you can, lots of good info there. http://67-72chevytrucks.com/vboard/s...d.php?t=489394

12-30-2011, 04:47 PM	#6
black_sheep454 Registered User Join Date: May 2011 Location: Lebanon, Mo. Posts: 1,315	Re: My 'new' 1970 Sierra Grande Man the interior in that truck is gorgeous. Posted via Mobile Device __________________ 1968 chevy lwb, getting ready to join forces with the 70 gmc 1970 gmc swb, getting ready to be a 68 chevy swb 1971 gmc lwb 2500 2wd Sierra Grande 1988 chevy 1-ton crew cab 2wd waiting for a 12v cummins



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