New Vintage Gauge LS swap 6.0
 

I need your help gentlemen. OK here is my problem I have a 1971 GMC 1500 and I did an LS swap to a 6.0 LQ9 from a Cadillac Escalade and now I am unable to get my aftermarket tack from LMC made by New Vintage Gauge Part # 38-8179 - GAUGE CLUSTER to work. I can get a signal, but it only reads as a 4 cylinder engine? Not sure where to go with this now?
Thanks

Re: New Vintage Gauge LS swap 6.0
 

You have to change a setting in the tune to compensate for it. I can't remember off the top of my head what it is so I will move your thread to the LS Swaps Forum. They will know.

LockDoc

Re: New Vintage Gauge LS swap 6.0
 

Pop the backcap...should have selector ...:chevy:

Re: New Vintage Gauge LS swap 6.0
 

I wish I could pop the back off but its an OEM style tack

Re: New Vintage Gauge LS swap 6.0
 

OK here is a post I made in an older thread.

I don't know what an l33 is or what ECM/PCM it uses but on my '67 with a stock tach dash & LS1 with the 411 PCM I just hooked the tach wire from the PCM to the tach output post on the back of the tach and changed the PCM resolution from 6 to 3 in the tune. Seems to work OK....

Here is what lsnova said in another post:

Quote:
Depends on what year your PCM is, but generally the 2003 and newer will need the pull up resistor. Also you'll have to change the tach resolution from 6 to 3 in the tune to make it read correctly since LS motors use a 4 cylinder signal, otherwise it will read half of what it's running (on a V8 tach). Other than that, just hook up the ignition wire like it was originally and hook the signal wire, the one that went to the coil, to the tach output out of the PCM, generally a white wire at C2 10, but that may depend on year and application.

LockDoc

Re: New Vintage Gauge LS swap 6.0
 

We still cant get LMC 38-7991 to work call them to see who makes them and they tell me they don't know

Re: New Vintage Gauge LS swap 6.0
 

So turns out the gauges I had were bad : ( so time to find some new ones..

Re: New Vintage Gauge LS swap 6.0
 

Auto meter!

Re: New Vintage Gauge LS swap 6.0
 

I have been looking at New Vintage Gauges

http://newvintageusallc.mybigcommerce.com/73021-03/