how do you tell the year of the engine - The 1947 - Present Chevrolet & GMC Truck Message Board Network

GMC70c20 · 03-30-2012, 10:20 AM

I have a lq4 that I bought fomr a junk yard a couple years ago, when I got it I was told it was out of a 2006 van. I need to know how do you tell the year of the engine? is there a casting number somewhere on the block if so where is it? I know its a genIII block, it has the cps in the back of the engine and has 317 heads on it. It also had a dead head injection system on it. I was under the impresion they when to genIIII in 2006, but that was the suposed year of this engine I'm confused.

gringoloco · 03-30-2012, 10:25 AM

Vans did weird stuff when compared to the truck and passenger car lines. Yours probably still has dive by cable, as well. Why the need to know what year, other than curiosity? I'm in for his one, too, as I have no idea how to tell specific model years outside of the different build configurations. You'd think there would be a decipherable code stamped somewhere...

ls1nova71 · 03-30-2012, 01:53 PM

If you ha e the PCM its in there. Also if you have the harness, there is usually a tag by the PCM connectors that has a build date on it.
There are subtle changes through the years like the returnless fuel rail that became standard on all but the flex fuel trucks in 2004, and DBW standard in 2003. But that's trucks, I belive vans went DBW in 2006 so yours should be DBW.
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GMC70c20 · 03-30-2012, 09:09 PM

its drive by cable, I have the harness and ecm i'lle have to check there. I was looking at a set of arp main studs and the years were 99-04.

Super73 · 03-30-2012, 09:18 PM

Look on the front of the block under the water pump. There is a clock looking deal and if memory serves you can tell from that.

Kim57 · 03-30-2012, 11:27 PM

My LS2 has a vin number stamped just behind the head on the drivers side. I called a local dealer and gave them the number and they told what year my engine was.
Kim

gringoloco · 03-31-2012, 08:56 AM

Good info on the VIN. Pretty sure mine is a crate motor replacement, so no luck there. I have found that some also have date codes stamped below the casting numbers and above the coolant sensor port on the cylinder heads...
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03-30-2012, 10:20 AM	#1
GMC70c20 Registered User Join Date: Feb 2003 Location: Iowa Posts: 974	how do you tell the year of the engine I have a lq4 that I bought fomr a junk yard a couple years ago, when I got it I was told it was out of a 2006 van. I need to know how do you tell the year of the engine? is there a casting number somewhere on the block if so where is it? I know its a genIII block, it has the cps in the back of the engine and has 317 heads on it. It also had a dead head injection system on it. I was under the impresion they when to genIIII in 2006, but that was the suposed year of this engine I'm confused. __________________ 1970 c20 converted to c10 sleeper 1979 c20 the wood hauler 1991 honda civic daily driver spray and pray baby

03-30-2012, 10:25 AM	#2
gringoloco A guy with a truck Join Date: Sep 2005 Location: Germany, for now Posts: 5,921	Re: how do you tell the year of the engine Vans did weird stuff when compared to the truck and passenger car lines. Yours probably still has dive by cable, as well. Why the need to know what year, other than curiosity? I'm in for his one, too, as I have no idea how to tell specific model years outside of the different build configurations. You'd think there would be a decipherable code stamped somewhere... __________________ -Chris Instagram _elgringoloco_ '70 Short-Wide How to: Ruin a perfectly good C10 ‘70 Blazer ConversionHow To: Ruin a Perfectly Good 4wd '72 Highlander How To: Ruin a Perfectly Good K/5 (SOLD) '72 Blazer 2WD How to: Ruin a perfectly good Blazer (SOLD) '05 Yukon Daily Driven (not so stock) Yukon (SOLD) ‘07 Yukon Denali (daily) Members met list: SCOTI, darkhorse970, 67cheby, 67cheby'sGirl, klmore, porterbuilt, n2billet, Fastrucken, classicchev, Col Clank, GSFMECH, HuggerCST, Spray-Bomb, BACKYARD88, 5150, fine69, fatbass, smbrouss70, 65StreetCruiser, GAc10boy

03-30-2012, 01:53 PM	#3
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,118	Re: how do you tell the year of the engine If you ha e the PCM its in there. Also if you have the harness, there is usually a tag by the PCM connectors that has a build date on it. There are subtle changes through the years like the returnless fuel rail that became standard on all but the flex fuel trucks in 2004, and DBW standard in 2003. But that's trucks, I belive vans went DBW in 2006 so yours should be DBW. Posted via Mobile Device __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html

03-30-2012, 09:09 PM	#4
GMC70c20 Registered User Join Date: Feb 2003 Location: Iowa Posts: 974	Re: how do you tell the year of the engine its drive by cable, I have the harness and ecm i'lle have to check there. I was looking at a set of arp main studs and the years were 99-04. __________________ 1970 c20 converted to c10 sleeper 1979 c20 the wood hauler 1991 honda civic daily driver spray and pray baby

03-30-2012, 09:18 PM	#5
Super73 Registered User Join Date: Nov 2007 Location: Bay Area, Ca Posts: 2,841	Re: how do you tell the year of the engine Look on the front of the block under the water pump. There is a clock looking deal and if memory serves you can tell from that. __________________ ------Motor---------------Bottle 60'---1.53---------------1.41 1/8---6.58 @ 105.92----5.87 @ 118.41 1/4---10.38 @ 126.97----9.24 @ 142.49

03-30-2012, 11:27 PM	#6
Kim57 Registered User Join Date: Aug 2007 Location: Corona, California Posts: 7,998	Re: how do you tell the year of the engine My LS2 has a vin number stamped just behind the head on the drivers side. I called a local dealer and gave them the number and they told what year my engine was. Kim __________________ My build thread http://67-72chevytrucks.com/vboard/s...d.php?t=283107

03-31-2012, 08:56 AM	#7
gringoloco A guy with a truck Join Date: Sep 2005 Location: Germany, for now Posts: 5,921	Re: how do you tell the year of the engine Good info on the VIN. Pretty sure mine is a crate motor replacement, so no luck there. I have found that some also have date codes stamped below the casting numbers and above the coolant sensor port on the cylinder heads... Posted via Mobile Device __________________ -Chris Instagram _elgringoloco_ '70 Short-Wide How to: Ruin a perfectly good C10 ‘70 Blazer ConversionHow To: Ruin a Perfectly Good 4wd '72 Highlander How To: Ruin a Perfectly Good K/5 (SOLD) '72 Blazer 2WD How to: Ruin a perfectly good Blazer (SOLD) '05 Yukon Daily Driven (not so stock) Yukon (SOLD) ‘07 Yukon Denali (daily) Members met list: SCOTI, darkhorse970, 67cheby, 67cheby'sGirl, klmore, porterbuilt, n2billet, Fastrucken, classicchev, Col Clank, GSFMECH, HuggerCST, Spray-Bomb, BACKYARD88, 5150, fine69, fatbass, smbrouss70, 65StreetCruiser, GAc10boy



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