2007 5.3L starting system wiring????? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

tk-mpl · 01-25-2010, 02:42 AM

I have been building a 68 stepside with a 2007 5.3L/4L60 setup for to long now..LOL. I was just finishing up the wiring, I though, and now I am unsure of the starting. A little brian storm--- the PCM enables the starter when it sees everything is good. The problem I am facing is the PCM won't see the ign. input because I am running the 68 ign. switch and the 2007 ign switch feeds into the BCM and then the BCM relays the message through GMLAN high speed network. Now if I just feed the starter enable circuit from ign switch will it start.. I know I will need to dissable Passlock and other stuff, I have EFI Live to do that, but at this time I am just worried about the wiring..

Thanx for you input guys..
Trevor

eagleuh1 · 01-25-2010, 07:41 AM

I don't know about 2007, but on 2005 5.3 from suburban, it was wired so that when you went to ignition on, relay energized to supply all "ignition on" circuits on fuse panel, including the PCM. When switch was taken to start position, the starter relay was energized to send power to turn starter. No bcm interaction required . Hope this helps. What fuse,relay center and wiring harness are you using?

BustedTruck · 01-25-2010, 11:02 AM

I just looked at the starter wiring diagram for the 2007 silverado. The diagram shows its a data communication line from the BCM to the PCM like you said. I would say to bypass the starter relay & hook the starter up like the 68 originaly was hooked up. Just hook the purple wire to the solenoid & go.

tk-mpl · 01-25-2010, 01:54 PM

So you think it will start if everything has its ignition power and the starter is engaged.

OldCreek · 01-25-2010, 02:20 PM

I wired my starter directly from the blazer's original harness. The PCM just needed the constant hot and ign hot wired from my secondary fuse box. I used a 2005 Escalade PCM/6.0L set up. It starts up just fine and the computer runs the engine just fine.

tk-mpl · 01-25-2010, 02:25 PM

the only dirfference is the 2007 has a whole new operating system.. Instead of serial data it has GMLAN Network high and low speed networks..

tk-mpl · 01-25-2010, 03:17 PM

well I rewired the starter relay enable circuit to the ign. switch. I guess we will see if it works.......hopefully soon..LOL

Trevor

Wootdog · 01-25-2010, 04:04 PM

I would do a search on the hotrodlane.cc website. I believe I got the url correct. They have done alot of swaps and have the wiring diagrams on there website for mating old to new. Hope that helps.
Kerry

BustedTruck · 01-25-2010, 04:19 PM

Quote:

Originally Posted by tk-mpl

So you think it will start if everything has its ignition power and the starter is engaged.

Yeah, that should work. remember we like pictures.

tk-mpl · 01-25-2010, 06:21 PM

this is where I am at right now.. Should be a couple of weeks and maybe ready to start.. Need my fuel tank (fuelcellguy) and a MAF sensor..

tk-mpl · 01-25-2010, 06:28 PM

here's the rest of it..

tk-mpl · 01-25-2010, 11:29 PM

Interesting! This is his very proud wife and I certainly can not wait to be driving this truck on date nights in the summer. He has spent many hours in the garage, and on the computer researching so it is awesome to see this all come together. Great Job. Love your proud wife, the one that will definately be sitting right beside you... soon. XOXO

01-25-2010, 02:42 AM	#1
tk-mpl Registered User Join Date: Jan 2008 Location: Lacombe, Alberta Posts: 353	2007 5.3L starting system wiring????? I have been building a 68 stepside with a 2007 5.3L/4L60 setup for to long now..LOL. I was just finishing up the wiring, I though, and now I am unsure of the starting. A little brian storm--- the PCM enables the starter when it sees everything is good. The problem I am facing is the PCM won't see the ign. input because I am running the 68 ign. switch and the 2007 ign switch feeds into the BCM and then the BCM relays the message through GMLAN high speed network. Now if I just feed the starter enable circuit from ign switch will it start.. I know I will need to dissable Passlock and other stuff, I have EFI Live to do that, but at this time I am just worried about the wiring.. Thanx for you input guys.. Trevor __________________ 1968 short box stepside. 2007 5.3L 4L60, tuned w/EFI Live 2005 Silverado bucket seats. Dominator 2600's all around. Porterbuilt tubular control arms. Magnaflow 3" dual exhaust.

01-25-2010, 07:41 AM	#2
eagleuh1 Registered User Join Date: Jul 2009 Location: Russellville, Arkansas Posts: 1,699	Re: 2007 5.3L starting system wiring????? I don't know about 2007, but on 2005 5.3 from suburban, it was wired so that when you went to ignition on, relay energized to supply all "ignition on" circuits on fuse panel, including the PCM. When switch was taken to start position, the starter relay was energized to send power to turn starter. No bcm interaction required . Hope this helps. What fuse,relay center and wiring harness are you using?

01-25-2010, 11:02 AM	#3
BustedTruck Registered User Join Date: Dec 2006 Location: Braselton, GA Posts: 245	Re: 2007 5.3L starting system wiring????? I just looked at the starter wiring diagram for the 2007 silverado. The diagram shows its a data communication line from the BCM to the PCM like you said. I would say to bypass the starter relay & hook the starter up like the 68 originaly was hooked up. Just hook the purple wire to the solenoid & go.

01-25-2010, 01:54 PM	#4
tk-mpl Registered User Join Date: Jan 2008 Location: Lacombe, Alberta Posts: 353	Re: 2007 5.3L starting system wiring????? So you think it will start if everything has its ignition power and the starter is engaged. __________________ 1968 short box stepside. 2007 5.3L 4L60, tuned w/EFI Live 2005 Silverado bucket seats. Dominator 2600's all around. Porterbuilt tubular control arms. Magnaflow 3" dual exhaust.

01-25-2010, 02:20 PM	#5
OldCreek Registered User Join Date: Jan 2007 Location: Central Coast California Posts: 1,026	Re: 2007 5.3L starting system wiring????? I wired my starter directly from the blazer's original harness. The PCM just needed the constant hot and ign hot wired from my secondary fuse box. I used a 2005 Escalade PCM/6.0L set up. It starts up just fine and the computer runs the engine just fine. __________________ 1972 K20 Suburban 5.7/700r4/NP205 Dana 44/H052 Sold 1972 C10 5.3L/4L60E 12bolt 5Lug - Sold 1971 K5 Blazer 6.0L LQ9 4L60E NP205 Dana 44/H052!!! 1970 K3500 1ton CrewCab 8.1L/Allison1000/NP205 Dana 60/14B!!!! - Sold 1984 K10 SWB 7.4L/4L80e/NP208 Corp 10/12 bolt Sold 1988 V30 CCLB 7.4L/TH400/NP205/Dana 60/Dana 70/3.73!!! (Sold) 2003 K2500HD 8.1/Allison1000/NP263

01-25-2010, 02:25 PM	#6
tk-mpl Registered User Join Date: Jan 2008 Location: Lacombe, Alberta Posts: 353	Re: 2007 5.3L starting system wiring????? the only dirfference is the 2007 has a whole new operating system.. Instead of serial data it has GMLAN Network high and low speed networks.. __________________ 1968 short box stepside. 2007 5.3L 4L60, tuned w/EFI Live 2005 Silverado bucket seats. Dominator 2600's all around. Porterbuilt tubular control arms. Magnaflow 3" dual exhaust.

01-25-2010, 03:17 PM	#7
tk-mpl Registered User Join Date: Jan 2008 Location: Lacombe, Alberta Posts: 353	Re: 2007 5.3L starting system wiring????? well I rewired the starter relay enable circuit to the ign. switch. I guess we will see if it works.......hopefully soon..LOL Trevor __________________ 1968 short box stepside. 2007 5.3L 4L60, tuned w/EFI Live 2005 Silverado bucket seats. Dominator 2600's all around. Porterbuilt tubular control arms. Magnaflow 3" dual exhaust.

01-25-2010, 04:04 PM	#8
Wootdog Senior Member Join Date: Jan 2001 Location: Virginia Beach, Va, USA Posts: 1,676	Re: 2007 5.3L starting system wiring????? I would do a search on the hotrodlane.cc website. I believe I got the url correct. They have done alot of swaps and have the wiring diagrams on there website for mating old to new. Hope that helps. Kerry __________________ 1969 Chevelle 1990 IROC Z Convertible 2002 Silverado LT

01-25-2010, 06:21 PM	#10
tk-mpl Registered User Join Date: Jan 2008 Location: Lacombe, Alberta Posts: 353	Re: 2007 5.3L starting system wiring????? this is where I am at right now.. Should be a couple of weeks and maybe ready to start.. Need my fuel tank (fuelcellguy) and a MAF sensor.. Attached Images __________________ 1968 short box stepside. 2007 5.3L 4L60, tuned w/EFI Live 2005 Silverado bucket seats. Dominator 2600's all around. Porterbuilt tubular control arms. Magnaflow 3" dual exhaust.

01-25-2010, 06:28 PM	#11
tk-mpl Registered User Join Date: Jan 2008 Location: Lacombe, Alberta Posts: 353	Re: 2007 5.3L starting system wiring????? here's the rest of it.. Attached Images __________________ 1968 short box stepside. 2007 5.3L 4L60, tuned w/EFI Live 2005 Silverado bucket seats. Dominator 2600's all around. Porterbuilt tubular control arms. Magnaflow 3" dual exhaust.

01-25-2010, 11:29 PM	#12
tk-mpl Registered User Join Date: Jan 2008 Location: Lacombe, Alberta Posts: 353	The Proud Wife Interesting! This is his very proud wife and I certainly can not wait to be driving this truck on date nights in the summer. He has spent many hours in the garage, and on the computer researching so it is awesome to see this all come together. Great Job. Love your proud wife, the one that will definately be sitting right beside you... soon. XOXO __________________ 1968 short box stepside. 2007 5.3L 4L60, tuned w/EFI Live 2005 Silverado bucket seats. Dominator 2600's all around. Porterbuilt tubular control arms. Magnaflow 3" dual exhaust.



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