blkchevyz

I'm finishing up my transmission swap and just got to the point where to start it up. Put the key and the display starts saying to service abs, brakes, stability... When I try to start nothing. So I figure it's related. Anyway I think I got everything hooked up, wheel sensors and the few transmissions sensors. Any ideas?

91parkave

iTrader: (4)

go back and check the PRNDL switch you probably didnt seat the connector it happended to me when i replaced my trans also check your started and make sure all your wires are going were there supposed to and tightned

blkchevyz

That's the big connector on the top correct? That seems good, I'm taking the starter to get tested to make sure it didn't get beat around

gxp-miller-gxp

Also check and make sure everything is grounded nice and good , had similar problems when I had a ground for the tranny comes loose

blkchevyz

Everything seems good I got 4 grounds going to the trans. What would I look for If my computer is shot? Had it retuned for the transmission as well

blkchevyz

With the car off should it know what gear it's in. If I shift it it's still saying its in park

blkchevyz

Well ended up being a broken ground on the passenger side, must of broke when I jacked up the motor

gxp-miller-gxp

Glad u you figured it out , let us know how it rides

blkchevyz

feels like a new car. i can really tell my rpms dropped when cruising around, so its got a lot less slip in it... before it felt like i was driving around with a huge stall.

spy2520

iTrader: (3)

old thread, guys I need some help. Just got done swapping a transmission in a 2007 Impala SS. Everything has power, car wont start. No clicks, nothing.

So far i have:
-battery voltage
-crossed terminals on the starter and it does spin
-checked all ground connections to see if they are attached (i counted 5 total, 1 above oil pan in front, 2 on a bellhousing bolt, 2 bolted to the transmission towards the drivers side)
-checked continuity of the s-wire (purple) going to the starter
-checked starter fuse and relay
-checked all the connections that i had disconnected

Any ideas or things I should look at?

Also, with the key in the on position, should the indicated gear show up? The car owner says no, but he hasn't driven the car in months.

Ill_Born_ss

Also, with the key in the on position, should the indicated gear show up?

YES!

recheck the transmission range switch and the VSS sensor also make sure the batt terminals are tight and the body ground at the batt, if you can turn them they are not tight.

spy2520

iTrader: (3)

Battery terminals are good, I'll double check the vss, but where is the range switch?

spy2520

iTrader: (3)

Just checked, vss is plugged in, and the main plug on top the trans is in. I noticed that unlike the OP, this car doesn't say whats gear its in at all, doesn't say its in park or anything.

spy2520

iTrader: (3)

I'm warming up to the fact that this is probably not the correct trans for the car. I wasn't involved with getting it so i have no clue. Looks identical but apparently these things vary electronically.

Ill_Born_ss

Got called away yesterday... Is there any tags on the transmission if so post the numbers and I can check.

Is it your original TCM? Did you remove it?

Yes the gearshift indicator should show it does in my 06 and in my neighbors 07.

spy2520

iTrader: (3)

It does have a tag, I'll check it when I get home. You think unplugging the Trans would force limp mode and allow it to start?

spy2520

iTrader: (3)

I did not mess with the TCM at all, same one that came with the car. Gonna check the tag now.

spy2520

iTrader: (3)

my finger is covering another 0.

Ill_Born_ss

Pardon the tardiness... it is a chev trans built in 06, has the 2.93 gears as standard in the IMP.

Check all your fuses and double check that everything is tight in the fuse box.

Also a more likely secanrio is the manual shaft detent lever maybe your problem.









Go here: http://www.gmls4.com/index.php?topic=1412.0 and find G111 and with your meter test from the mount of G111 to the appropriate connector pins @ (trans internal mode K-bk/wh, starter relay bk/wh, TCM 49 bk/wh) If I remember correctly the starter relay is the same as the fuel pump relay, swap and verify them as functional.

I will post some info here in a bit (not near my scanner at the moment)

spy2520

iTrader: (3)

Thanks man, I really appreciate the help. Starter relay is the same as the rear defrost relay, I tried swapping it.