2017 GS won’t start

Reply Subscribe

Thread Tools

Search this Thread

Apr 10, 2019 | 11:57 PM

#21

Iceman2000

Thread Starter

Instructor

Joined: May 2014

Posts: 178

Likes: 38

From: Virginia Beach

Awesome! Thanks, Laser....there are no pin numbers at the connector, but base on the wire color order I should be able to figure it out..

Last edited by Iceman2000; Apr 11, 2019 at 12:24 AM.

Apr 11, 2019 | 10:11 AM

#22

Osman

Racer

Joined: Apr 2009

Posts: 308

Likes: 89

From: Belmont Ontario

i had same symptoms when i put my engine back in... everything you are describing.. turned out i forgot one of big grounds that goes on driver side engine, right under headers... i had it tucked in with brake lines and just didn't see it..

Apr 11, 2019 | 02:59 PM

#23

laserdude2215

Burning Brakes

Joined: Nov 2016

Posts: 1,192

Likes: 438

From: San Dimas CA

Pinouts.

Attached Images

Cnx Pinout.PDF (152.5 KB, 103 views)

Apr 11, 2019 | 03:51 PM

#24

Iceman2000

Thread Starter

Instructor

Joined: May 2014

Posts: 178

Likes: 38

From: Virginia Beach

Thanks, because the sequence by color was not working at all. I also found a damaged L/F brake sensor, which I’m ordering from the dealership.

Apr 11, 2019 | 04:19 PM

#25

laserdude2215

Burning Brakes

Joined: Nov 2016

Posts: 1,192

Likes: 438

From: San Dimas CA

Once you get the GMLAN connected (the stuff shown in post #19), it should start.

Apr 12, 2019 | 11:29 AM

#26

Iceman2000

Thread Starter

Instructor

Joined: May 2014

Posts: 178

Likes: 38

From: Virginia Beach

Laser, where can I purchase the first schematic your sent?

Apr 12, 2019 | 01:27 PM

#27

laserdude2215

Burning Brakes

Joined: Nov 2016

Posts: 1,192

Likes: 438

From: San Dimas CA

Helm 2017 Service Info

Apr 12, 2019 | 05:47 PM

#28

Iceman2000

Thread Starter

Instructor

Joined: May 2014

Posts: 178

Likes: 38

From: Virginia Beach

Thanks! All connected but still no start...verifying continuity of all that soldering to insure no disconnects.

Corvette Stories

The Best of Corvette for Corvette Enthusiasts

10 Ugly Corvettes That We Still Kinda Love

Joe Kucinski

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

Brett Foote

10 Things Every Corvette Owner Needs (2026 Edition)

Michael S. Palmer

8 Most "Only Corvette Owners Understand" Quirks and Problems

Pouria Savadkouei

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Joe Kucinski

How Much Horsepower Every Corvette Engine "LOST" in 1972

Joe Kucinski

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Michael S. Palmer

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Joe Kucinski

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Joe Kucinski

8 Coolest Corvette Pace Cars (and Replicas) of All Time

Verdad Gallardo

Apr 12, 2019 | 05:50 PM

#29

Iceman2000

Thread Starter

Instructor

Joined: May 2014

Posts: 178

Likes: 38

From: Virginia Beach

Helm wiring diagram is on-point and straight forward.

Apr 12, 2019 | 06:07 PM

#30

laserdude2215

Burning Brakes

Joined: Nov 2016

Posts: 1,192

Likes: 438

From: San Dimas CA

Try your scan tool.

Apr 12, 2019 | 06:24 PM

#31

Iceman2000

Thread Starter

Instructor

Joined: May 2014

Posts: 178

Likes: 38

From: Virginia Beach

U0073
U0100
U0101

Using truck for jump; no battery issue....

Last edited by Iceman2000; Apr 12, 2019 at 06:48 PM.

Apr 12, 2019 | 07:42 PM

#32

laserdude2215

Burning Brakes

Joined: Nov 2016

Posts: 1,192

Likes: 438

From: San Dimas CA

Those are GMLAN codes. Probably history codes from the cut harness. Clear the codes and check again.

Edit: I just noticed that there is another white wire.

EBCM Pin 20 connects to Power Steering Control Module Pin 5. Wire color is WH.
EBCM Pin 33 connects to Power Steering Control Module Pin 4. Wire color is L-BU/YE.

Maybe you have a couple of the white wires swapped around.

Last edited by laserdude2215; Apr 12, 2019 at 08:24 PM.