68 K20 Dash Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

68K20 · 12-09-2006, 01:59 AM

Got another question for the endless cornucopia of knowledge that is known as this forum and its members.

I have a 68 K20 with the Tach and speed warning dash. It has four holes in it, and I am wondering what the correct use of the holes is. The reason I ask is that LMC pictures differ from what I have in my truck. Check out the pic and tell me if what I have is stock or been rearranged. Thanks folks.

hogrocket · 12-09-2006, 03:28 AM

On a 68 the wiper-washer knob should be where your lights are and the lights should be below that. The choke should be where your wiper-washer switch is, on the right side. At least that's how it was on my 68 c20. The choke would not work mounted on the left side - unless the cable was ran through some kind of custom pulley setup. M

chevguy7 · 12-09-2006, 05:12 AM

I have a 70 C10 and my wipers are where you marked it on the picture. Maybe they moved it around and that is why there is a hole on the left side. It is just a guess but could the chock possibly belong where in the upper right corner where its marked wipers? Just a guess.

Longhorn Man · 12-09-2006, 06:20 AM

in 69, they moved things around, headlights in the upper left, wipers in the upper right.
Before that, it was as hogrocket described.

looks tome like someone found a speedwarning tach inst panel out of a 69 and installed it on your 68. (69 was the last year for speed warning)

*wolfthing2000* · 12-09-2006, 09:22 AM

I am just curious why if choke is on left that the cable would need a custom pully set-up???

msgross · 12-09-2006, 10:17 AM

my 68 K-10 has four holes... Wiper upper left, lights on lower left, choke (mine was deleted with the "GM" cover plate, engine had divorced choke) on upper right, and manual throttle on lower right.

68K20 · 12-09-2006, 11:10 AM

Quote:

Originally Posted by msgross

my 68 K-10 has four holes... Wiper upper left, lights on lower left, choke (mine was deleted with the "GM" cover plate, engine had divorced choke) on upper right, and manual throttle on lower right.

Is the "GM" coverplate you speak of, still availble from any source? I wish I didn't have the extra hole in the dash.

68K20 · 12-09-2006, 11:13 AM

On a side note, does anybody know what it takes to get the speed warning to work? I hate having a gizmo that doesn't do anything.

**Palf70Step** · 12-09-2006, 11:37 AM

You can always get a new dash bezel for a 69 up gauge cluster and that will rid you of the extra hole. As far as how to get the speed warning to work, that I don't know. I would just ignore the thing anyways

msgross · 12-09-2006, 12:29 PM

Here is the GM plate that was covering my choke hole (that sounds weird!) I think that it was original...Only seen a few floating around though. The back piece screws from the back of the bezel.

Rod · 12-09-2006, 10:53 PM

Looks like its not a speedwarning speedhead from the pic.

Slammed70 · 12-09-2006, 11:46 PM

Why were looking at your dash....whats that little box thing bolted up under the dash to the left of your steering wheel?

My truck has that, I was gonna take it off but when I unscrewed the hardline on the back of it. Ans when I did...some fluid (Im assuming) brake fluid started to leak. So I snugged it back up and walked away.

GMCMAX · 12-09-2006, 11:56 PM

Looks like the old style trailer brake controller under the dash.

68K20 · 12-10-2006, 11:11 AM

Quote:

Originally Posted by GMCMAX

Looks like the old style trailer brake controller under the dash.

Yep that is exactly what that is, but I hope to remove it next weekend, It was causing a wierd problem (could'nt shut engine off while foot was on the brake), and it is also in the way of the parking brake.

msgross · 12-10-2006, 11:15 AM

after reading your original post I see that I should clarify my dash in the 68. My fourth hole is under your wiper hole....that's where the manual throttle is.

68K20 · 12-10-2006, 11:16 AM

Quote:

Originally Posted by Rod

Looks like its not a speedwarning speedhead from the pic.

Here is a better pic of the speedo.

Rod · 12-10-2006, 12:39 PM

Feel around or take it out and look at the back of the cluster. The cluster has to have a stud which the white wire here in the picture attaches too. That stud is insulated from the cluster because that's a live powered wire when activated.
There is a fuse in that fuse holder also in the harness also.
The buzzer is also connected all to that single wire harness which is needed to active the speedwarning buzzer. The buzzer is set off by the red speedo needle touching a contact point on the white needle. The white needle is adjusted to whatever speed you want it to warn you. The buzzer mounts to the firewall above the column. I have seen them on the other side of the column compared to the pic "solver" posted of the mounting position. The red thick wire of the harness connects to the fuse box. As for the plug in position in the fuse box...I've seen it in the unfused position. It has its own fuse in circuit, so it's not that much a concern. First thing I'd check would be the harness circuit and see if a buzzer is there.

Longhorn Man · 12-10-2006, 01:17 PM

probably just unplugged

12-09-2006, 01:59 AM	#1
68K20 Noobie McNoobster Join Date: Nov 2006 Location: SoAZ Posts: 68	68 K20 Dash Question Got another question for the endless cornucopia of knowledge that is known as this forum and its members. I have a 68 K20 with the Tach and speed warning dash. It has four holes in it, and I am wondering what the correct use of the holes is. The reason I ask is that LMC pictures differ from what I have in my truck. Check out the pic and tell me if what I have is stock or been rearranged. Thanks folks. __________________ The Stable: 1968 Chevy K20 w/tilt, working AM/FM, AC and 350/350/205 w/Disk Brakes 1990 Chevy V2500 Suburban 2005 Kawi KLR650 1983 Honda Goldwing GL1100 Standard (Naked) 1995 Miata M Fortes Fortuna adiuvat Last edited by 68K20; 12-09-2006 at 01:59 AM.

12-09-2006, 03:28 AM	#2
hogrocket Junior Member Join Date: Apr 2006 Location: San Diego Posts: 100	Re: 68 K20 Dash Question On a 68 the wiper-washer knob should be where your lights are and the lights should be below that. The choke should be where your wiper-washer switch is, on the right side. At least that's how it was on my 68 c20. The choke would not work mounted on the left side - unless the cable was ran through some kind of custom pulley setup. M

12-09-2006, 05:12 AM	#3
chevguy7 Registered User Join Date: Oct 2006 Location: Washington Posts: 316	Re: 68 K20 Dash Question I have a 70 C10 and my wipers are where you marked it on the picture. Maybe they moved it around and that is why there is a hole on the left side. It is just a guess but could the chock possibly belong where in the upper right corner where its marked wipers? Just a guess.

12-09-2006, 06:20 AM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: 68 K20 Dash Question in 69, they moved things around, headlights in the upper left, wipers in the upper right. Before that, it was as hogrocket described. looks tome like someone found a speedwarning tach inst panel out of a 69 and installed it on your 68. (69 was the last year for speed warning)

12-09-2006, 09:22 AM	#5
wolfthing2000 Account Suspended Join Date: Oct 2004 Posts: 1,276	Re: 68 K20 Dash Question I am just curious why if choke is on left that the cable would need a custom pully set-up???

12-09-2006, 10:17 AM	#6
msgross Registered User Join Date: Jul 2006 Location: Central PA Posts: 12,201	Re: 68 K20 Dash Question my 68 K-10 has four holes... Wiper upper left, lights on lower left, choke (mine was deleted with the "GM" cover plate, engine had divorced choke) on upper right, and manual throttle on lower right. Last edited by msgross; 12-09-2006 at 10:19 AM.

12-09-2006, 11:13 AM	#8
68K20 Noobie McNoobster Join Date: Nov 2006 Location: SoAZ Posts: 68	Re: 68 K20 Dash Question On a side note, does anybody know what it takes to get the speed warning to work? I hate having a gizmo that doesn't do anything. __________________ The Stable: 1968 Chevy K20 w/tilt, working AM/FM, AC and 350/350/205 w/Disk Brakes 1990 Chevy V2500 Suburban 2005 Kawi KLR650 1983 Honda Goldwing GL1100 Standard (Naked) 1995 Miata M Fortes Fortuna adiuvat

12-09-2006, 11:37 AM	#9
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 47,471	Re: 68 K20 Dash Question You can always get a new dash bezel for a 69 up gauge cluster and that will rid you of the extra hole. As far as how to get the speed warning to work, that I don't know. I would just ignore the thing anyways __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! Last edited by Palf70Step; 12-09-2006 at 12:32 PM.

12-09-2006, 12:29 PM	#10
msgross Registered User Join Date: Jul 2006 Location: Central PA Posts: 12,201	Re: 68 K20 Dash Question Here is the GM plate that was covering my choke hole (that sounds weird!) I think that it was original...Only seen a few floating around though. The back piece screws from the back of the bezel. Attached Images

12-09-2006, 10:53 PM	#11
Rod Join Date: Dec 1999 Location: Eastern - Manitoba Canada, Winnipeg Posts: 4,369	Re: 68 K20 Dash Question Looks like its not a speedwarning speedhead from the pic. __________________ Senior active founding member. 70 3/4 ton GMC Suburban 4x4 250/4 spd. 71 1/2 ton Suburban Chevy 4x4, 350/350 72 Chev 1 ton tow truck 402BB w/Holmes 440 wrecker on propane 2005 FLSTSCI Harley Springer 85 FXSB Harley Lowrider 72 Triumph 650 Bonneville 5spd "Poor people don't have hobbies" Quote from wife.

12-09-2006, 11:56 PM	#13
GMCMAX Active Member Join Date: Jan 2006 Location: Lower Mid-East Ca. Posts: 326	Re: 68 K20 Dash Question Looks like the old style trailer brake controller under the dash. __________________ Never try to teach a pig to sing; it wastes your time and annoys the pig! Gets More Chicks My lugnuts require more torque than your honda makes! 68 GMC, 4X4 conversion w/73 k20 running gear and springs, 350 4spd, 4.10's, D44 powerlok front, 14BFF govlock rear, 33" tires, lifted 4".

12-10-2006, 11:15 AM	#15
msgross Registered User Join Date: Jul 2006 Location: Central PA Posts: 12,201	Re: 68 K20 Dash Question after reading your original post I see that I should clarify my dash in the 68. My fourth hole is under your wiper hole....that's where the manual throttle is.

12-10-2006, 12:39 PM	#17
Rod Join Date: Dec 1999 Location: Eastern - Manitoba Canada, Winnipeg Posts: 4,369	Re: 68 K20 Dash Question Feel around or take it out and look at the back of the cluster. The cluster has to have a stud which the white wire here in the picture attaches too. That stud is insulated from the cluster because that's a live powered wire when activated. There is a fuse in that fuse holder also in the harness also. The buzzer is also connected all to that single wire harness which is needed to active the speedwarning buzzer. The buzzer is set off by the red speedo needle touching a contact point on the white needle. The white needle is adjusted to whatever speed you want it to warn you. The buzzer mounts to the firewall above the column. I have seen them on the other side of the column compared to the pic "solver" posted of the mounting position. The red thick wire of the harness connects to the fuse box. As for the plug in position in the fuse box...I've seen it in the unfused position. It has its own fuse in circuit, so it's not that much a concern. First thing I'd check would be the harness circuit and see if a buzzer is there. Attached Images __________________ Senior active founding member. 70 3/4 ton GMC Suburban 4x4 250/4 spd. 71 1/2 ton Suburban Chevy 4x4, 350/350 72 Chev 1 ton tow truck 402BB w/Holmes 440 wrecker on propane 2005 FLSTSCI Harley Springer 85 FXSB Harley Lowrider 72 Triumph 650 Bonneville 5spd "Poor people don't have hobbies" Quote from wife. Last edited by Rod; 12-10-2006 at 12:46 PM.

12-10-2006, 01:17 PM	#18
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: 68 K20 Dash Question probably just unplugged



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