ok i have a 06 LS with gray cloth and its a manual. I have a 06 LT thats wrecked with 5081 miles on it it has power every thing, butons on the steering wheel, pw, pdl, pm, seven speeker pioneer radio system, abs, heated seats and fog lights and the insterment clusterand the pcm and bcm.

so i took the complete wiring harness out of the dash and the other was the body wiring 2 differnt harness and swiched every thing over.with the door locks pw regs both door harness. got up at 7.00 am -finshed at 2 am there was 2 people " working.


finshed now !! this is what i have pw-pdl-pm-heated seats -7 speaker pioner stereo radio
buttons on steering wheel- white gauges- spedo that goes to 140 insted of one that goes to 120

every thing works great but the car wont start now fuel pump runs ing is on but no cranking any sugestions i left the car on for 20 min. to set the IGN control module same thing chased every wire all are pluged in except for the abs and the curtin air bags i dident want those but i still can put them in and the abs unit.

so what could be keeping it from starting

 

No idea. WIsh I could help you.

 

I wish i could have the pcm/bcm and tranny and pedals out of that car

 

Oh jesus.

Did you install any modules from the LT? If you installed the BCM or PCM from the LT into your car you're going to need a security relearn at least. That's a dealership only thing at this point.

Best advice I can give is tow it to the dealer and bend over. Or go back to stock and tow it to the dealer and have a security relearn done.

 

yea i did all of them

 

so how do you do a securty relearn? can i just fix this wih a scan tool? i changed every thing except pcm and i have the other the
LT has the top speed programed to 125 and the LS has it programed to 105.

so can you just get rid of the pass code thing.

 

Swap the harnesses and all the parts and mudules and then get it reflashed to match a car that was produced with those options

 

Security relearn can be done with scan tool

 

how on the scan tool and what kind. as far as swiching the harness and module i did complete swaps except for the engine and it harness

 

bump

 

The security relearn can only be done with a Tech 2 and a CANdi module along with an available GM Service Programming System terminal and the required off-car power adapter. So if you work at a dealer or you work at a shop with a Tech 2, CANdi module and SPS, tow it there and program it.

As for the speed limiter thing, I think this can be overcome by just reprogramming the PCM with the same options your car came with, but changing the tire size to the 205/55-16. The overall tire height between the 195/60-15s and the 205/55-16s are the exact same. So the only reason I see GM would offer that option during programming would be to change the speed limiter.

My LT had a speed limiter of 107, but I reprogrammed it with the wider tire size in hopes of bumping that limiter. I haven't tested the top speed yet, but the PCM took the program just fine and has been working perfect for two weeks.

P.S. There are a few DTC diagnostic software improvements that've been released for the 2.2 Cobalts. They prevent false codes from setting.

 

thanks for the info malaclypse ive talked with you before

so im taking it to the dealer today for the relearn they said it would be 100.00 to do this and every thing would be fine. so 100.00 and 30 labor hrs for power evevy thing thats a good deal for me. ill show pics of before and after and during install on a scale of 1 to 10 this project was a 8 in all. well its off to the dealer for the relearn

 

well i have bad news now gm cant get it to work at all with there scan tool. they dont know why and cant help me . i dont under stand why it wont work i changed every thing from a working running car. both harness,except engine harness every thing was swiched over and i dont under stand why it doesent work. any ideas here?? well it looks like im going to have to switch it all back then take it to them again for the security reflash i hope it takes any info about this would be nice..

 

any info here about this would be nice

 

i got the car back from gm and they cant fix it and the scan tool wont read any thing thats what they said but when i picked the car up and unlocked the door the alarm started going off and it dident do that before and i cant make it shut up. in less i un hook the battery.

i need info about this prob. please can any one help me???????? ps. ive read and done every step in the service manual about this and called every gm service department in my area they all said it should be working. and it should have taken the security reflash with no probs.

 

One quick question. Does both vehicles, yours and the wrecked one, have ABS? If not, there's a bulletin about something simular to what's happening to yours. A copy of that is below.
Hope it helps.



Subject: No Start After Engine Harness Replacement (NON-ABS) - keywords communication connector crank EBCM high inoperative inop LAN light message missing speed wiring #PIC3786B - (12/05/2006)



Models: 2005-2007 Chevrolet Cobalt

2006-2007 Chevrolet HHR

2004-2007 Chevrolet Malibu/Maxx

2007 Pontiac G5

2005-2007 Pontiac G6

2005-2006 Pontiac Pursuit (Canada only)

2006-2007 Pontiac Solstice



This PI was superseded to add 2007 Model years. Please discard PIC3786A.



The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:
You might encounter a condition of a NO START after the engine harness was replaced for another unrelated issue. You might find that you have no communication with the PCM and Possible TCM. For NON ABS equipped cars there are 2 wires that go through the EBCM to the ECM which if the vehicle is NOT equipped with ABS and the connector is left disconnected the vehicle will not run, and will cause an open circuit in high speed LAN

Note: All engine harnesses are fully content equipped.

Recommendation/Instructions:
The High speed Lan wires will have to be jumped and spliced together, making sure to match the Tan/Black (2500) to Tan/Black(2500) then Tan (2501) to Tan. (2501)

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

 

no my car does not have abs the other one does i was going to put it on but dident yet. so im going to try this thanks for the info. ill let ya know what happens.

 

Coo. Let us know if it works out ok. It seems like someone has had this problem before cuz GM knows about it

 

ok i cut and spliced the 4 wires together and still no change in whats going on but i noticed my bat is about dead so im chargng the car on a slow trickel charger.
but the alarm sounding did stop.

 

bump

 

here is my experience when it comes to vehicule wireing.... when you change any wiring, change everysingle thing that comes with it, regardless of whether or not its "looks" the same. i had an issue once with a malibu engine swap that ended in me tearing the whole interior out to change the rest of the harness going from the tail lights right up to the door locks in the front doors. It might be the same plug in, but somewhere in the circuit its different, car manufacturers often improve or change their harnesses during a production year so weather or not it looks the same change it all.

This includes everything that comes attached to it, like dome lights, fuel pumps, door latches(these usually have plug ins with sensors that tell the car that the door is closed/open) anything at all.

Make sure you didnt leave a ground unbolted. this has also happened to me resulting in scratching my head for hours till i realized i forgot to plug or bolt something in.

Basically you either need to change a part that plugs into the harness or make sure you changed everything no matter how unsignificant it may seem. Anyways... good luck, i know the feeling.

 

Wow man, hope you figure it out. Now I know not to try any of that on my LS. Of course I had the dealer add the power windows, locks and cruise when I purchased my '07. They had a big problem w/ getting the cruise to work but after a few days it was figured out.

 

i think i know what was keeping the car from starting !! i changed the tunblers in the ignition becouse i dident want to change the door locks tumblers " both sides " it was simpiler that way. are keys have chips in them that courispond with the ignition module so thats why every thing worked but it woundent start. it did not match the " ign module " so it was saying im trying to steal it. becouse i put every thing back to the way it was as far as dash wiring and body wiring and all modules steering wheel and radio and insterment cluster. but still havent bu still havent changed back the door harness the car started and every thing worked except for the speakers and door harness they have different plugs. no engine lites no security lites no problems.

so im going to try it again i have 4 days to get it right or back it goes. since ive done this 3 times now it takes me 1 1/2 hrs to get the compleate body and dash harness out. then it takes 2 1/2 to 3 hrs to put it back. as far as to make it run and check every thing to see if they work. if it all does the its time to put the inteir in for keeps.

but before i do this why couldent gm figure this out when i payed them 160.00 dollars and put every thing in the trunk that was changed. and i told them i changed the key and tumblers. but thats not a quote yet. i have to see if that was the case.