Tandem Lock - The 1947 - Present Chevrolet & GMC Truck Message Board Network

uk72step · 11-19-2004, 09:09 AM

Hi Guys,

Bought a 72 stepside a few months back, having loads of fun with it. Was just wonderign about something. On the fuel gauge cluster there are two lamps (one on right at around 4 clock,which has never illuminated) one at 7 clock says tandem lock.

What is the 'tandem lock' (she's a two wheel drive so that rules out any 4 wheel drive thingys which I thought maybe something to do with diff locks)
and what is the other lamp?

Cheers
Lee

Sweet72 · 11-19-2004, 09:34 AM

Maybe your instrument cluster came out of a dump truck or motorhome with tandem rear wheels. Just a guess though.

72gord · 11-19-2004, 10:02 AM

Yup Sweet...that cluster was in a big truck from the factory...or at least the fuel guage.

Longhorn Man · 11-19-2004, 10:47 AM

Think of it as a brake warning light.

uk72step · 11-19-2004, 11:48 AM

Thanks Guys :-)
Planning on doing some work and getting a refurbed gauge set, hence the question as the ones in the catalogues only have the brake and fuel warning lights...
Maybe it just had idiot lights on it before and it was changed at some point for convenience.
Might just keep it as a novelty feature.....

Longhorn Man · 11-19-2004, 12:29 PM

nope, the base model dummy light inst panel uses the same guages as the optional acc guage equipped ones. That fuel guage is defenately out of a 67 - 72 C/40 or bigger.

11-19-2004, 09:09 AM	#1
uk72step outta the car velocityboy Join Date: Nov 2004 Location: Scotland Posts: 112	Tandem Lock Hi Guys, Bought a 72 stepside a few months back, having loads of fun with it. Was just wonderign about something. On the fuel gauge cluster there are two lamps (one on right at around 4 clock,which has never illuminated) one at 7 clock says tandem lock. What is the 'tandem lock' (she's a two wheel drive so that rules out any 4 wheel drive thingys which I thought maybe something to do with diff locks) and what is the other lamp? Cheers Lee

11-19-2004, 09:34 AM	#2
Sweet72 Registered User Join Date: Nov 2003 Location: Alexandria, VA Posts: 1,534	Maybe your instrument cluster came out of a dump truck or motorhome with tandem rear wheels. Just a guess though. __________________ '72 GMC SWB C1500 Custom, frame-off in progress. 383 SBC, 9:1CR, Comp Cams XE262H, Scat internal balanced crank, Eagle SIR 6" rods, Keith Black dish pistons, Dart Iron Eagle 72/180 heads, Weiand Stealth intake, Stewart stage I water pump, Holley 4bbl vac sec, TH350 with B&M Shift Improver Kit. 12 bolt positraction. Last edited by Sweet72; 11-19-2004 at 09:42 AM.

11-19-2004, 10:02 AM	#3
72gord Never enough time!! Join Date: Mar 2004 Location: sw Wisconsin Posts: 601	Yup Sweet...that cluster was in a big truck from the factory...or at least the fuel guage.

11-19-2004, 10:47 AM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Think of it as a brake warning light.

11-19-2004, 11:48 AM	#5
uk72step outta the car velocityboy Join Date: Nov 2004 Location: Scotland Posts: 112	Thanks Guys :-) Planning on doing some work and getting a refurbed gauge set, hence the question as the ones in the catalogues only have the brake and fuel warning lights... Maybe it just had idiot lights on it before and it was changed at some point for convenience. Might just keep it as a novelty feature.....

11-19-2004, 12:29 PM	#6
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	nope, the base model dummy light inst panel uses the same guages as the optional acc guage equipped ones. That fuel guage is defenately out of a 67 - 72 C/40 or bigger.



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