2018 Denali 4x4 with 6.2 dies with no warning, need help

survivor · September 6, 2019

Engine hot or cold, say backing out of parking spot, just dies. Cruising down highway, slow down for curve, dies.

Brought to dealer, cannot find any issue. Says there is no code showing up. Occasionally the CEL will just flash and go away.

Truck has ZERO modifications, 27K mi and beside what I would consider too much slack or clunk in the rear differential all is well.

1SLOW1500 · September 6, 2019

There has to be a code history for it even if there is no light on.

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jay webb · September 6, 2019

there is a bulletin regarding loss of power/dash/radio power asst with having electrical issues with:

battery

battery cables

grounds.

#18-NA-161: Steering Jerks Or Kicks Back / Reduced Power Steering Assist / Engine Stall / No Start / Service Stabilitrak / IPC / Radio / HVAC Goes Blank Various DTCs - (Oct 22, 2018)

GMC	Sierra 1500	2014	2014
	Sierra	2015	2018
	Sierra Limited	2019	2019
	sierra 2500/3500	2019	2019
	Yukon Models	2015	2019

Some customers may comment on one or more of the following conditions:

Reduced or loss of power steering assist (only LD models equipped with electric power steering)
Steering wheel jerks or kicks back when turning
Service Stabilitrak message with warning chime
Engine stall
IPC going blank or inoperative
Radio/ICS going blank
HVAC going blank
Hood ajar message and/or dome lamps flash when shifting into reverse
Alarm sounds when locking doors or door locks cycling
Wipers continue to run for a short time after turning off and then stop/park in the incorrect location

Some technicians may find one or more of the following DTC’s set:

B1325, B124B, B1
24C, B127B, B127E, C0544, C0710, C0800, P0513, U0020, U0073, U0077, U0078, U0100, U0101, U0102, U0121, U0126, U0131, U0140, U0155, U0164, U0415, U0422, U0428, U0452, U1509, U150F and/or U15E1

Cause 1	This condition may be caused by battery cables with high resistance and/or loose connections at the: Positive or negative battery cables Battery fuse block
Cause 2	This condition may be caused by a poor BCM ground at G218.
Cause 3	This condition may be caused by a shorted B+ Battery cable (3) at the Starter Solenoid caused by: A loose starter shield contacting the starter battery cable terminal ring. A starter cable ring terminal that has been mis-installed and/or rotated when installed on the starter solenoid.
Cause 4	This condition may be caused by a discharged or faulty battery.

TXGREEK · September 6, 2019

there is a bulletin regarding loss of power/dash/radio power asst with having electrical issues with:
battery
battery cables
grounds.
#18-NA-161: Steering Jerks Or Kicks Back / Reduced Power Steering Assist / Engine Stall / No Start / Service Stabilitrak / IPC / Radio / HVAC Goes Blank Various DTCs - (Oct 22, 2018)

GMC
Sierra 1500
2014
2014

Sierra
2015
2018

Sierra Limited
2019
2019

sierra 2500/3500
2019
2019

Yukon Models
2015
2019

Some customers may comment on one or more of the following conditions:

Reduced or loss of power steering assist (only LD models equipped with electric power steering)

Steering wheel jerks or kicks back when turning

Service Stabilitrak message with warning chime

Engine stall

IPC going blank or inoperative

Radio/ICS going blank

HVAC going blank

Hood ajar message and/or dome lamps flash when shifting into reverse

Alarm sounds when locking doors or door locks cycling

Wipers continue to run for a short time after turning off and then stop/park in the incorrect location
Some technicians may find one or more of the following DTC’s set:

B1325, B124B, B1

24C, B127B, B127E, C0544, C0710, C0800, P0513, U0020, U0073, U0077, U0078, U0100, U0101, U0102, U0121, U0126, U0131, U0140, U0155, U0164, U0415, U0422, U0428, U0452, U1509, U150F and/or U15E1

Cause 1
This condition may be caused by battery cables with high resistance and/or loose connections at the:

Positive or negative battery cables

Battery fuse block

Cause 2
This condition may be caused by a poor BCM ground at G218.

Cause 3
This condition may be caused by a shorted B+ Battery cable (3) at the Starter Solenoid caused by:

A loose starter shield contacting the starter battery cable terminal ring.

A starter cable ring terminal that has been mis-installed and/or rotated when installed on the starter solenoid.

Cause 4
This condition may be caused by a discharged or faulty battery.

You’re absolutely correct, same thing happened to my wife’s Escalade, turned out it was the negative cable needing replacement. The connector crimped onto the cable wasn’t crimped tight enough causing engine shut off. It’s a scary situation but easily remedied. Good luck

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survivor · September 7, 2019

The truck is for my son, and I told him to check cables, connections and so on. But not so thoroughly. This will be done in the morning.

Went to the dealer, but who know what they did, or likely didnt do.

TXGREEK · September 7, 2019

The truck is for my son, and I told him to check cables, connections and so on. But not so thoroughly. This will be done in the morning.

Went to the dealer, but who know what they did, or likely didnt do.

Here’s what was done on my 18 Sierra, the same thing that was wrong with my Escalade.

It’s a common problem with GM, replacing the negative cable tends to fix it. It’s a cheap start with high results

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survivor · September 7, 2019

Just did the grounds under the upper dash. Both were clean, tight, and no interference from anything. Loosened them and tightened back just for the heck of it.

Ground cable next

TXGREEK · September 7, 2019

Just did the grounds under the upper dash. Both were clean, tight, and no interference from anything. Loosened them and tightened back just for the heck of it.

Ground cable next

The actual pc that clamps onto the battery cable itself may not be clamped down enough and has been a problem for years

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